Summer scab, rots, sooty blotch, and flyspeck are the main targets currently, and are present in orchards throughout the state. Captan plus a phosphorous acid like Prophyt or Rampart can provide good summer disease control. Add single-site products such as Topsin, Merivon, Luna Sensation, and Pristine for improved control. Consider the pre-harvest interval as we approach harvest. Time applications before rain events through the growing season according to the cover spray rule of applications every 2” of rain or 14 days, whichever comes first. 

Codling Moth (CM) trap captures have decreased compared with previous weeks, and most are below the treatment threshold. Additional treatments are not recommended unless there are more than 5 moths per trap. 

Scale crawlers are active and can be found feeding on fruit (Figure 2). Second-generation crawler emergence is estimated to be at or just past peak. Control options at this point include Assail, Belay, Actara, and Sivanto. Venerate has a 0-day PHI, making it useful for blocks near or at harvest.

Aphid populations, on average, remain below treatment levels, but are increasing as dry, hot weather continues. A treatment threshold is set at 50% of the terminals infested with live colonies. Minimize the use of pyrethroids to manage insect pests, as they can knock down beneficial organisms and predators. Research from Dr. Monique Rivera at Cornell University has demonstrated good control from Sefina for Woolly Apple Aphid in late summer. 

Brown Marmorated Stink Bugs are active in orchards statewide; however, observations of injury remain low in managed orchards. See the NJ Tree Fruit Production guide for effective materials on harvesting fruit.  

White Apple Leafhopper second-brood activity is active in South Jersey orchards. Check the undersides of 20 leaves per tree across 5 trees per block; the treatment threshold for the second brood is 2 or more leafhoppers per leaf. Feeding at this stage causes leaf mottling, and excrement can degrade fruit quality right before harvest. High adult populations can also create a major nuisance for harvest crews. If treatment is needed, thorough coverage on both upper and lower leaf surfaces is essential for effective control. Sivanto Prime, Leverage 360, and Assail are effective materials.  

Average Trap Captures in Apple – Southern Counties

Week	STLM	TABM	CM	OFM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	18	11	6	3	25	2	–
5/18/2026	16	21	3	10	54	13	–
5/25/2026	1.3	23	2	2	71	7	–
6/1/2026	378	33	3	2	49	6	0.4
6/8/2026	258	11	2	1	61	21	1.2
6/15/2026	355	4	0.6	1.5	57	13	0.8
6/22/2026	178	5	0.6	2	54	8	1.2
6/29/2026	504	0.3	0.1	0.5	27	12	0.8
7/6/2026	202	1.1	1.6	0.6	25	7.5	0.6
7/13/2026	226	0.9	1	1	33	1	1.6
7/20/2026	253	1.8	2	3	26	2.3	2.4
7/27/2026	246	1.5	5	1.6	38	2	1.6
8/3/2026	253	1.6	2	1	47	1.4	2.6
8/10/2026	NA	1	1	1	48		0.8

 

Average Trap Captures in Apple – Northern Counties

Week	STLM	TABM	CM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	13.7	1.5	1.8	12.8	1.1	–
5/18/2026	8.3	13.25	2.4	18.5	10.8	–
5/25/2026	2.2	13.75	1.2	24.5	5.1	–
6/1/2026	25.1	24.3	3.4	23.8	9.4	0.3
6/8/2026	94	22.3	0.3	24.6	18	1.4
6/15/2026	68	22.3	1	22.6	14	1.1
6/22/2026	105.9	35	0.7	27.2	8.2	0.5
6/29/2026	100	11.5	0.3	28.9	5.3	0.3
7/6/2026	50.2	7.3	0.6	26.4	5.2	0.2
7/13/2026	52.4	7	0.5	24.8	5.3	0.2
7/20/2026	69.7	2.5	0.7	27.4	4.3	0.1
7/27/2026	92.4	2	0.6	30.6	5.3	0.2
8/3/2026	78.6	1.8	0.5	2.3	2.2	0.5
8/10/2026	56.5	3.3	0.7	26.3	3.2	0.1

Brown rot has been observed in ripening fruit. Maintain coverage through harvest with highly effective rot materials: Indar, Cevya, Orius, Quash, and Tilt (FRAC group 3); and Merivon, Luna Sensation, Pristine, and Quadris Top (FRAC group 11). 

Rhizopus rot has begun appearing in the field in South Jersey as fruit reaches maturity (Figure 3). Rotted peaches look similar to brown rot but are slightly darker, leaky, and the skin slips easily from the decaying flesh underneath. Look for white, fluffy fungal growth (“whiskers”) that turns gray-to-black as fruiting bodies develop. Infection typically occurs through wounds, so minimizing insect feeding, physical injury, and other diseases before harvest is key. Pre- and postharvest treatments, along with rapid cooling after harvest, will help reduce disease incidence. Merivon and Quadris Top 2.72SC are effective materials.  

Oriental Fruit Moth (OFM) trap captures have decreased compared with previous weeks and are below the threshold at most sites. Consider treatment if trap captures are above threshold (>8 moths per trap). A few options for late in the season with low PHIs would include Assail (7-day), Baythroid XL (7-day), Danitol (3-day), Delegate (1-day), and Sevin (3-day). 

Japanese beetles are present in orchards and have been persistent this season, feeding in the tree canopy and on fruit. To prevent losses, include neonicotinoid materials such as Assail (7-day PHI), pyrethroids such as Baythroid (7-day), or premix products such as Leverage 360 (7-day). Verdepryn (IRAC 28, 7-day PHI) is also effective. 

Scale crawlers are active in orchards. See recommendations above for management options. 

Brown Marmorated Stink Bug and other catfacing insects like tarnished plant bug are active in orchards, but injury remains low.  

Lesser and greater peachtree borer trap captures have increased from previous weeks. Where high trap captures have been recorded, growers should begin preparing for post-harvest trunk applications of pyrethroids (Asana or Pounce) or chlorpyrifos, with mid-August through early September generally providing the best timing to target young larvae before they enter the tree. Apply the insecticide thoroughly to the lower trunk, root flare, scaffold crotches, and any canker areas, following label directions. 

Average Trap Captures in Peach – Southern Counties

Week	OFM	TABM	LPTB	PTB	BMSB
5/11/2026	5	10	–	–	–
5/18/2026	4	20	–	–	–
5/25/2026	2	20	31	1	–
6/1/2026	4	46	28	3	0
6/8/2026	8	13	25	3	0.75
6/15/2026	5	6	13	3	0.75
6/22/2026	6	4	23	7	1
6/29/2026	3	0.2	16	6	2
7/6/2026	5	0.6	16	4	1.3
7/13/2026	9	1.4	18	7	3.5
7/20/2026	8	2.4	12	6	2.5
7/27/2026	6	2	6	6	8
8/3/2026	3	2	13	10	1.3
8/10/2026	4	1	25	10	1

 

Average Trap Captures in Peach – Northern Counties

Week	OFM	LPTB	PTB
5/11/2026	4.4	24	0
5/18/2026	2.4	16.5	0.2
5/25/2026	0.7	8.75	0.1
6/1/2026	1.8	11	0.5
6/8/2026	0.6	8.5	0.05
6/15/2026	3.5	9.7	1.2
6/22/2026	3.4	7.4	1.6
6/29/2026	2	4.6	1.1
7/6/2026	1.7	8.5	1.8
7/13/2026	0.5	2.8	3.7
7/20/2026	2.1	1.5	2.9
7/27/2026	4.3	0.9	1.7
8/3/2026	3.8	1.5	1.2
8/10/2026	1.5	4.5	2.1

Spotted-wing drosophila (SWD) trap captures have increased (Table 1), but as harvest activities wrap up, management will shift away from controlling SWD in the field. Sanitation by removing unharvested, culled, or overripe fruit from the field will help to significantly reduce SWD pressure. 

We are keeping a close eye on sharp-nosed leafhopper (SNLH) and scale traps, since this will be your next insecticide spray.  Activity for both has increased (Tables 2 and 3), but not sufficiently to warrant treatment.   

Table 1. Spotted-Wing Drosophila and Blueberry Maggot traps 

	Spotted-wing Drosophila				Blueberry Maggot
	Atlantic County		Burlington County		Atlantic County		Burlington County
	Avg	High	Avg	High	Avg	High	Avg	High
6/6	8.99	35	2.86	7	0.03	1	0	0
6/12	9.9	46	3.7	25	0	0	0	0
6/20	10.24	48	8.22	35	0	0	0	0
6/27	6.96	78	3.6	18	0	0	0	0
7/3	29.78	273	50.9	81	0.33	27	0	0
7/10	31.2	130	86.1	177	0.15	12	0	0
7/18	28.3	110	59.3	125	0.07	5	0.16	1
7/25	40.22	227	79.1	223	0.07	6	0.06	2
7/31	52.3	199	58.8	167	0.04	2	0.04	1
8/8	64.8	341	121	226	0.01	1	0	0

  

Table 2. Sharp-nosed Leafhopper and Oriental Beetle traps 

	Sharp-nosed Leafhopper				Oriental Beetle
	Atlantic County		Burlington County		Atlantic County		Burlington County
	Avg	High	Avg	High	Avg	High	Avg	High
6/6	1.42	16	1.25	7	5.78	35	2.57	14
6/12	0.56	12	4.8	46	62	340	47	170
6/20	0.88	6	1.44	12	411	2025	403	2025
6/27	0.77	9	0.37	2	243	2025	458	2025
7/3	1.5	15	0.55	2	466.7	2025	182.7	510
7/10	1.40	14	0.33	2	396	1970	393	2025
7/18	0.98	13	0	0	191.1	2025	235	1350
7/25	1.11	7	0.11	1	64.4	340	136.6	675
7/31	0.90	5	0.25	2	27.68	132	35.3	85
8/8	0.85	18	0.3	2	15.6	65	24.3	75

 

Table 3. Scale Traps 

	Putnam		Terrapin
	Avg	High	Avg	High
5/23	36.85	230	1.8	8
5/29	65.17	352	21.2	41
6/6	136.25	402	75.25	84
6/12	164	639	96	202
6/20	102	288	85	167
6/27	45	193	32	119
7/3	41.7	315	27.5	46
7/10	16.26	74	24.6	61
7/18	6.06	25	12	24
7/25	10.5	73	11	24
7/31	12.6	64	11.3	27
8/8	20.8	135	15.3	32

Monitoring for black shadow (Figure 4) in blueberry fields showed that in fields where black shadow was observed, the average incidence was approximately 25%, with one field reaching 100%.

For recommendations for black shadow management, refer to the 2026 Rutgers Commercial Blueberry Guide. 

Grape berry moth (GBM) trap captures have declined in vineyards. Continue to monitor for damage to bunches and consider treatment when more than 10-15% of the bunches show berry webbing and GBM larval feeding injury. Be mindful of the pre-harvest interval as we approach harvest. See the Commercial Grape Pest Control Recommendations for New Jersey for management options. 

Spotted lanternfly (SLF) adults are present in vineyards. As we approach September, adult migration into vineyards will increase, at which point we consider applying materials with long residual efficacy. See this previous Plant & Pest Advisory post on Management of Spotted Lanternfly in New Jersey Vineyards.  

Spotted-Wing Drosophila male adult flies are being trapped in vineyards in southern counties (Figure 5). Monitoring efforts have shifted to grapes as veraison progresses and ripe fruit becomes vulnerable to infestation.

Disease management continues to focus mainly on downy mildew, powdery mildew, bunch rot, and black rot. Outbreaks of anthracnose fruit rot have also been observed (Figure 6). Refer to the NJ Commercial Grape Production Guide for more information on disease management options.

Summer scab, rots, sooty blotch, and flyspeck are the main targets at this time and are present in orchards throughout the state (Figure 1). Captan plus a phosphonate-based acid like Prophyt can slow scab development and provide good summer disease control. Add FRAC 7 and 11 single-site products, such as Merivon, Luna Sensation, and Pristine, for improved control. Consider the pre-harvest interval as harvest approaches. Also, read labels and consider restrictions on the number of applications for FRAC 7 + 11 fungicides. Time applications before rain events through the growing season according to the cover spray rule of applications every 2” of rain or 14 days, whichever comes first.

As terminal shoot growth sets, fire blight infection will slow. Pruning of blighted shoots should be done in dry weather, cutting 8 to 12 inches below diseased wood. Pruning tools should be sanitized after each cut by dipping them into a 10 percent bleach solution.

Codling Moth (CM) trap captures increased from the previous weeks. Additional treatments are not recommended unless there are more than 5 moths per trap.

Scale crawlers are active and can be found feeding on fruit (Figure 2). Control options at this point include Assail, Belay, and Venerate (0-day PHI; Make two applications 7 days apart, starting a week after crawler emergence).

Aphid populations, on average, remain below treatment levels. A treatment threshold is set at 50% of the terminals infested with live colonies. Minimize the use of pyrethroids to manage insect pests, as they can knock down beneficial organisms and predators. Research from Dr. Monique Rivera at Cornell University has demonstrated good control from Sefina for Woolly Apple Aphid in late summer.

Brown Marmorated Stink Bug adults and nymphs are being captured in orchards statewide. See the NJ Tree Fruit Production guide for effective materials on harvesting fruit.

Dogwood borer continues to be caught in pheromone-baited traps in orchards. Chemical control is not recommended at this time. If trap counts have been high in your orchard blocks, consider mating disruption (i.e., Isomate DWB) for next season, which has been very effective in reducing larval infestations. NOTE: multiyear treatment is recommended for optimal efficacy.

Average Trap Captures in Apple – Southern Counties

Week	STLM	TABM	CM	OFM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	18	11	6	3	25	2	–
5/18/2026	16	21	3	10	54	13	–
5/25/2026	1.3	23	2	2	71	7	–
6/1/2026	378	33	3	2	49	6	0.4
6/8/2026	258	11	2	1	61	21	1.2
6/15/2026	355	4	0.6	1.5	57	13	0.8
6/22/2026	178	5	0.6	2	54	8	1.2
6/29/2026	504	0.3	0.1	0.5	27	12	0.8
7/6/2026	202	1.1	1.6	0.6	25	7.5	0.6
7/13/2026	226	0.9	1	1	33	1	1.6
7/20/2026	253	1.8	2	3	26	2.3	2.4
7/27/2026	246	1.5	5	1.6	38	2	1.6

 

Average Trap Captures in Apple – Northern Counties

Week	STLM	TABM	CM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	13.7	1.5	1.8	12.8	1.1	–
5/18/2026	8.3	13.25	2.4	18.5	10.8	–
5/25/2026	2.2	13.75	1.2	24.5	5.1	–
6/1/2026	25.1	24.3	3.4	23.8	9.4	0.3
6/8/2026	94	22.3	0.3	24.6	18	1.4
6/15/2026	68	22.3	1	22.6	14	1.1
6/22/2026	105.9	35	0.7	27.2	8.2	0.5
6/29/2026	100	11.5	0.3	28.9	5.3	0.3
7/6/2026	50.2	7.3	0.6	26.4	5.2	0.2
7/13/2026	52.4	7	0.5	24.8	5.3	0.2
7/20/2026	69.7	2.5	0.7	27.4	4.3	0.1
7/27/2026	92.4	2	0.6	30.6		0.2

Foliar diseases, including Fabraea leaf spot and summer rots, should be managed to protect fruit as we approach harvest. FRAC 7 and 11 fungicides provide good control. Consider the pre-harvest interval (PHI) as we approach harvest. Also, read labels and consider restrictions on the number of applications for FRAC 7 and 11 fungicides. Topsin (FRAC 1) is also a good option for control with a 1-day PHI.

Where fire blight is present, it is appropriate to prune out infected shoots. Prune out strikes on dry, cooler days, cut back 8-12” back into healthy tissue, and sterilize pruners between cuts.

Pear psylla populations have decreased compared to previous weeks. If adult psylla are present, options for control include Actara, Assail, and Belay (IRAC group 4A); Sivanto Prime (IRAC group 4D); Delegate (IRAC Group 5); and products containing abamectin (IRAC group 6).

Brown rot incidence remains low, but where fruit is present, rot has been observed (Figure 3). If you are harvesting fruit, this would be a good week to use one of your stronger single-site materials with a low PHI: Indar, Cevya, Orius, Quash, and Tilt (FRAC group 3); and Merivon, Luna Sensation, Pristine, and Quadris Top (FRAC group 11).

Oriental Fruit Moth (OFM) trap captures have decreased, and flight activity should be ending. Consider treatment if trap captures are above threshold (>8 moths per trap). A few options for late in the season with low PHIs would include Assail (7-day), Baythroid XL (7-day), Danitol (3-day), Delegate (1-day), and Sevin (3-day).

Japanese beetles are present in orchards and have been persistent this season, feeding in the tree canopy and on fruit. To prevent losses, include neonicotinoid materials such as Assail (7-day PHI), pyrethroids such as Baythroid (7-day), or premix products such as Leverage 360 (7-day). Verdepryn (IRAC 28, 7-day PHI) is also effective.

Scale crawlers are active in orchards. Options at this point include Assail, Belay (Group 4A), and the bioinsecticide Venerate. These products may provide some late-season suppression where fruit damage is observed. Venerate has a 0-day PHI, making it useful for blocks near or at harvest.

Brown Marmorated Stink Bug nymphs and adults are active and increasing in orchards. Late-season and pre-harvest control options include Assail (7-day PHI), Brigade (14-day), Danitol (3-day), Leverage 360 (7-day), and Venerate (0-day).

Lesser and greater peachtree borer trap captures continued to decline this week, although adults remain active, and egg laying is ongoing (Figure 4). Newly hatched larvae feed on the bark before boring into the lower trunk and root crown, where they overwinter and can weaken or kill trees. Growers should begin preparing for post-harvest trunk applications of pyrethroids (Asana or Pounce) or chlorpyrifos, with mid-August through early September generally providing the best timing to target young larvae before they enter the tree. Apply the insecticide thoroughly to the lower trunk, root flare, scaffold crotches, and any cankered areas, following label directions.

Average Trap Captures in Peach – Southern Counties

Week	OFM	TABM	LPTB	PTB	BMSB
5/11/2026	5	10	–	–	–
5/18/2026	4	20	–	–	–
5/25/2026	2	20	31	1	–
6/1/2026	4	46	28	3	0
6/8/2026	8	13	25	3	0.75
6/15/2026	5	6	13	3	0.75
6/22/2026	6	4	23	7	1
6/29/2026	3	0.2	16	6	2
7/6/2026	5	0.6	16	4	1.3
7/13/2026	9	1.4	18	7	3.5
7/20/2026	8	2.4	12	6	2.5
7/27/2026	6	2	6	6	8

 

Average Trap Captures in Peach – Northern Counties

Week	OFM	LPTB	PTB
5/11/2026	4.4	24	0
5/18/2026	2.4	16.5	0.2
5/25/2026	0.7	8.75	0.1
6/1/2026	1.8	11	0.5
6/8/2026	0.6	8.5	0.05
6/15/2026	3.5	9.7	1.2
6/22/2026	3.4	7.4	1.6
6/29/2026	2	4.6	1.1
7/6/2026	1.7	8.5	1.8
7/13/2026	0.5	2.8	3.7
7/20/2026	2.1	1.5	2.9
7/27/2026	4.3	0.9	1.7

Spotted-wing drosophila (SWD) adults continue to be captured in monitoring traps (Table 1). SWD remains the primary target for insecticide applications.

Blueberry maggot is present, but is managed when controlling for SWD (Table 1). For management recommendations for SWD in blueberry and other berry crops, reference Rutgers Cooperative Extension Factsheet FS1246 and SWD Insecticides for Berries.

Table 1. Spotted-Wing Drosophila and Blueberry Maggot traps

	Spotted-wing Drosophila				Blueberry Maggot
	Atlantic County		Burlington County		Atlantic County		Burlington County
	Avg	High	Avg	High	Avg	High	Avg	High
6/6	8.99	35	2.86	7	0.03	1	0	0
6/12	9.9	46	3.7	25	0	0	0	0
6/20	10.24	48	8.22	35	0	0	0	0
6/27	6.96	78	3.6	18	0	0	0	0
7/3	29.78	273	50.9	81	0.33	27	0	0
7/10	31.2	130	86.1	177	0.15	12	0	0
7/18	28.3	110	59.3	125	0.07	5	0.16	1
7/25	40.22	227	79.1	223	0.07	6	0.06	2
7/31	52.3	199	58.8	167	0.04	2	0.04	1

 

Sharp-nosed leafhopper trap counts remain low (Table 2).

Oriental beetle adult flight activity continues to decrease (Table 2).

Table 2. Sharp-nosed Leafhopper and Oriental Beetle traps

	Sharp-nosed Leafhopper				Oriental Beetle
	Atlantic County		Burlington County		Atlantic County		Burlington County
	Avg	High	Avg	High	Avg	High	Avg	High
6/6	1.42	16	1.25	7	5.78	35	2.57	14
6/12	0.56	12	4.8	46	62	340	47	170
6/20	0.88	6	1.44	12	411	2025	403	2025
6/27	0.77	9	0.37	2	243	2025	458	2025
7/3	1.5	15	0.55	2	466.7	2025	182.7	510
7/10	1.40	14	0.33	2	396	1970	393	2025
7/18	0.98	13	0	0	191.1	2025	235	1350
7/25	1.11	7	0.11	1	64.4	340	136.6	675
7/31	0.90	5	0.25	2	27.68	132	35.3	85

 

Scales crawler activity of both terrapin scale and Putnam scale slightly increased (Table 3). Monitoring will continue throughout the fall to detect the emergence of the second crawler generation and determine the appropriate timing for pesticide applications. Continued monitoring will help ensure that management recommendations are based on current pest activity and that insecticide applications are made when crawlers are most susceptible. Scale infestations on fruit remain low (Table 4).

Table 3. Scale Traps

	Putnam Scale		Terrapin Scale
	Avg	High	Avg	High
5/23	36.85	230	1.8	8
5/29	65.17	352	21.2	41
6/6	136.25	402	75.25	84
6/12	164	639	96	202
6/20	102	288	85	167
6/27	45	193	32	119
7/3	41.7	315	27.5	46
7/10	16.26	74	24.6	61
7/18	6.06	25	12	24
7/25	10.5	73	11	24
7/31	12.6	64	11.3	27

 

Table 4. Scale Infestation on Fruit

	Scale % infestation on fruit
	Avg	High
6/12	0.13	2.1
6/20	0.19	5.7
6/27	0.06	1.5
7/3	0.06	1.8
7/10	0.07	3.1
7/18	0.02	0.9
7/25	0	0
7/31	0.006	0.1

 

The IPM team continues to observe anthracnose and Alternaria. For recommendations on fungicide products, refer to the 2026 Commercial Blueberry Pest Control Recommendations for New Jersey or https://extension.rutgers.edu/sites/default/files/2026-03/bb-v42n01.pdf.

	% Mummy Berry Infested Fruit		% Anthracnose Infested Fruit		% Alternaria Infested Fruit
	Avg	High	Avg	High	Avg	High
6/20	0.03	0.9	0.06	2.5	0.004	0.7
6/27	0.007	0.3	0.08	2.2	0.07	3
7/3	0.005	0.2	0.227	4.1	0.07	1.2
7/10	0.002	0.1	0.20	2.5	0.13	3
7/18	0.001	0.1	1.23	13.1	0.43	9.3
7/25	0	0	0.42	2	0.11	0.6
7/31	0	0	0.89	9.7	0.05	0.3

 

Weeds

Last week, the IPM team monitored 88 fields for weed pressure. The predominant weed species observed across production fields were nutsedge and goosegrass followed by marestail and barnyard grass. This was the last week for assessing weed pressure in the fields.  Based on current field conditions, postemergence herbicide selections should prioritize products with strong activity on annual grass species while considering the existing weed spectrum within individual fields. Refer to the 2026 Rutgers Blueberry Commercial Guide for management recommendations. 

Grape berry moth (GBM) continues to be captured in pheromone-baited traps in vineyards. Where populations have been managed, no further treatment should be needed, particularly as insecticide management shifts to other pests. Monitor for damage to bunches and consider treatment when 10% or more of the bunches show berry webbing and GBM larval feeding injury. See the Commercial Grape Pest Control Recommendations for New Jersey for management options.

Spotted lanternfly (SLF) adults are present in vineyards. As we approach September, adult migration into vineyards will increase, at which point we consider applying materials with long residual efficacy. See this previous Plant & Pest Advisory post on Management of Spotted Lanternfly in New Jersey Vineyards.

Spotted-Wing Drosophila trap counts continue to remain high in blueberries in southern counties. Monitoring efforts have shifted to grapes as veraison progresses and ripe fruit becomes vulnerable to infestation.

Grape root borer (GRB) adults are active and flying in vineyards. Monitoring traps indicate the presence of GRB in the area, but only scouting around the bases of vines will indicate the presence of GRB in the vineyard. Adult moths will lay eggs July-August. Larvae will enter the soil and migrate to the roots, where they feed and cause damage. Dr. Anne Nielsen and the IPM team will be monitoring vineyards throughout the state to assess GRB population pressure in NJ.

Grapes are beginning veraison in southern counties. Disease management continues to focus mainly on downy mildew (Figure 5), as well as powdery mildew, bunch rot, and black rot, but disease observations have been minimal. Refer to the NJ Commercial Grape Production Guide for more information on disease management options.

Various rots, but mostly bitter rot, are present in orchards throughout the state (Figure 1). Broad-spectrum fungicides, such as captan and ziram, are effective. Captan alone may not adequately suppress severe summer disease pressure. Adding single-site products such as Merivon, Luna Sensation, Pristine, Omega, and Aprovia may improve control. The addition of phosphonate products such as ProPhyt or Rampart to captan sprays can improve control of rots and other summer diseases, including sooty blotch and flyspeck. Time applications before rain events through the growing season according to the cover spray rule of applications every 2” of rain or 14 days, whichever comes first.

Codling Moth (CM): Trap captures are increasing in some orchards, but on average, counts remain low for the second generation of codling moth. If you have applied your 2nd-generation insecticides and your trap counts are low (less than 5 moths per trap), additional treatments are not needed. 

Scale: Crawlers are active and can be monitored by wrapping black electrical tape covered with double-sided sticky tape around branches with previous scale infestations. Use a hand lens to detect crawlers on the tape. Control options during crawler emergence include Esteem (2 applications/year; 45-day PHI); Centaur (1 application/year; 14-day PHI); Diazinon 50W (2 applications/year; 21-day PHI); and Venerate (0-day PHI; Make two applications 7 days apart starting a week after crawler emergence). Neonicotinoids will have some suppression.  

Woolly Apple Aphid (WAA); Green Apple (Spirea) Aphids (GAA): Populations on average remain below treatment levels. A treatment threshold is set at 50% of the terminals infested with live colonies. Predation by lady beetles and other predators and parasitoids has been observed and can help to maintain pest populations below damaging thresholds. Scout in known hotspots for WAA colonies now. Minimize the use of pyrethroids to manage insect pests, as they can knock down beneficial organisms and predators. Research from Dr. Monique Rivera at Cornell University has demonstrated good control from Sefina for WAA in late summer. 

Brown Marmorated Stink Bugs: Brown Marmorated Stink Bugs are being captured in orchards statewide. Both adults and nymphs are present (Figure 2). See the NJ Tree Fruit Production guide for effective materials on harvesting fruit.

Dogwood borer: On average, moth captures in pheromone traps continue to decrease. If trap captures remain high in your orchard blocks, consider a coarse trunk application of Assail before August.  

Average Trap Captures in Apple – Southern Counties

Week	STLM	TABM	CM	OFM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	18	11	6	3	25	2	–
5/18/2026	16	21	3	10	54	13	–
5/25/2026	1.3	23	2	2	71	7	–
6/1/2026	378	33	3	2	49	6	0.4
6/8/2026	258	11	2	1	61	21	1.2
6/15/2026	355	4	0.6	1.5	57	13	0.8
6/22/2026	178	5	0.6	2	54	8	1.2
6/29/2026	504	0.3	0.1	0.5	27	12	0.8
7/6/2026	202	1.1	1.6	0.6	25	7.5	0.6
7/13/2026	226	0.9	1	1	33	1	1.6
7/20/2026	253	1.8	2	3	26	2.3	2.4

Average Trap Captures in Apple – Northern Counties

Week	STLM	TABM	CM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	13.7	1.5	1.8	12.8	1.1	–
5/18/2026	8.3	13.25	2.4	18.5	10.8	–
5/25/2026	2.2	13.75	1.2	24.5	5.1	–
6/1/2026	25.1	24.3	3.4	23.8	9.4	0.3
6/8/2026	94	22.3	0.3	24.6	18	1.4
6/15/2026	68	22.3	1	22.6	14	1.1
6/22/2026	105.9	35	0.7	27.2	8.2	0.5
6/29/2026	100	11.5	0.3	28.9	5.3	0.3
7/6/2026	50.2	7.3	0.6	26.4	5.2	0.2
7/13/2026	52.4	7	0.5	24.8	5.3	0.2
7/20/2026	69.7	2.5	0.7	27.4	4.3	0.1

• Foliar diseases should be managed with Mancozeb or Ziram, plus a single-site fungicide, to maintain pressure and inoculum at low levels, protecting fruit and maintaining a healthy orchard going into the next season.  

• Where fire blight is present, it is appropriate to prune out infected shoots. Prune out strikes on dry, cooler days, cut back 8-12” back into healthy tissue, and sterilize pruners between cuts.  

Pear psylla: Adult populations have decreased compared to previous weeks. If adult psylla are present, options for control include Actara, Assail, and Belay (IRAC group 4A); Sivanto Prime (IRAC group 4D); Delegate (IRAC Group 5); and products containing abamectin (IRAC group 6).  

Brown rot: Brown rot incidence remains low, but where fruit is present,rot has been observed (Figure 3).Highly effective rot materials include DMI’s Indar, Cevya, Orius, Quash, and Tilt (FRAC group 3), and Strobilurin materials including Merivon, Luna Sensation, Pristine, and Quadris Top (FRAC group 11), which should be applied beginning 3 – 4 weeks prior to harvest. 

Figure 3. Brown rot developing on ripening peach.

Oriental Fruit Moth (OFM): A biofix point for OFM was set on 4/2 for southern counties and 4/15 in northern counties. See below for timings for the third generation. Consider treatment if trap captures are above threshold (>8 moths per trap). 

OFM 3rd Generation Timing
		Insecticide Type
County/Region	Degree Days  by 7/28 base 45	Conventional  2100-2200  2450-2500	Intrepid/Rimon  2000-2100  2350-2450	Diamides/Virus  2025-2150  2375-2450
Gloucester – Southern	2640	1st –past  2nd –past	1st –past  2nd –past	1st –past  2nd –past
Middlesex – Northern	2429	1st – past  2nd – 7/29-7/31	1st – past  2nd – 7/25-7/29	1st – past  2nd – 7/27-7/29

 

Japanese Beetles: Japanese beetles have been observed feeding significantly on foliage and fruit. Products containing imidacloprid (Admire Pro, Leverage 360) are effective and may be warranted to protect fruit through harvest.  

Scale: Crawlers are active in orchards. Esteem is a good scale material that has a 14-day PHI for stone fruit. Centaur is also effective, has a 14-day PHI, and can be used only once during the growing season. Venerate has shown efficacy as a pre-harvest treatment against scale and has a 0-day PHI. If using Venerate to control scale insects, make 2 applications 7 days apart, starting a week after crawler emergence. 

Tarnished plant bugs and other catfacing insects: Insects are active, but new fruit feeding injury has been minimal.   

Brown Marmorated Stink Bugs: Nymphs and adults are active. See the NJ Tree Fruit Production guide for effective materials.  

Mites: Mite pressure can increase due to hot, dry weather from previous weeks. If leaf damage from high infestation is heavy enough, defoliation can occur, and next year‘s crop can be affected. Consider treatment if more than 10 mites per leaf are observed. The 2026 Southeastern Peach, Nectarine, and Plum Pest Management and Culture Guide has a good summary of miticides labeled for spider mite control on pages 31-32. Consider the pre-harvest interval and colony size/life stages of the mite present. Limit miticide use to one application per material class per season.

Peachtree Borers: Trap captures of both lesser peachtree borer and peachtree borer continued to decline this week, although adults remain active, and egg laying is ongoing. Newly hatched larvae feed on the bark before boring into the lower trunk and root crown, where they overwinter and can weaken or kill trees (Figure 4). Growers should begin preparing for post-harvest trunk applications, with mid-August through early September generally providing the best timing to target young larvae before they enter the tree. Trunk sprays containing chlorpyrifos (Lorsban), esfenvalerate (Asana XL), and permethrin (Pounce) are recommended for borer control. Apply the insecticide thoroughly to the lower trunk, root flare, scaffold crotches, and any cankered areas, following label directions.

 

Average Trap Captures in Peach – Southern Counties

Week	OFM	TABM	LPTB	PTB	BMSB
5/11/2026	5	10	–	–	–
5/18/2026	4	20	–	–	–
5/25/2026	2	20	31	1	–
6/1/2026	4	46	28	3	0
6/8/2026	8	13	25	3	0.75
6/15/2026	5	6	13	3	0.75
6/22/2026	6	4	23	7	1
6/29/2026	3	0.2	16	6	2
7/6/2026	5	0.6	16	4	1.3
7/13/2026	9	1.4	18	7	3.5
7/20/2026	8	2.4	12	6	2.5

Average Trap Captures in Peach – Northern Counties

Week	OFM	LPTB	PTB
5/11/2026	4.4	24	0
5/18/2026	2.4	16.5	0.2
5/25/2026	0.7	8.75	0.1
6/1/2026	1.8	11	0.5
6/8/2026	0.6	8.5	0.05
6/15/2026	3.5	9.7	1.2
6/22/2026	3.4	7.4	1.6
6/29/2026	2	4.6	1.1
7/6/2026	1.7	8.5	1.8
7/13/2026	0.5	2.8	3.7
7/20/2026	2.1	1.5	2.9

Spotted-wing drosophila: Trap captures increased in both Atlantic and Burlington Counties. SWD remains the primary target for insecticide applications (Table 1). For management recommendations for SWD in blueberry and other berry crops, reference Rutgers Cooperative Extension Factsheet FS1246 and SWD Insecticides for Berries. 

Blueberry maggot: Traps continue to capture adults in low numbers, particularly in fields where picking and pesticide applications have slowed. 

Table 1. Spotted-Wing Drosophila and Blueberry Maggot traps 

	Spotted-wing Drosophila				Blueberry Maggot
	Atlantic County		Burlington County		Atlantic County		Burlington County
	Avg	High	Avg	High	Avg	High	Avg	High
6/6	8.99	35	2.86	7	0.03	1	0	0
6/12	9.9	46	3.7	25	0	0	0	0
6/20	10.24	48	8.22	35	0	0	0	0
6/27	6.96	78	3.6	18	0	0	0	0
7/3	29.78	273	50.9	81	0.33	27	0	0
7/10	31.2	130	86.1	177	0.15	12	0	0
7/18	28.3	110	59.3	125	0.07	5	0.16	1
7/25	40.22	227	79.1	223	0.07	6	0.06	2

Sharp-nosed leafhopper: Trap counts remain low (Table 2).  

Oriental beetle: Adult flight activity has decreased (Table 2). 

Table 2. Sharp-nosed Leafhopper and Oriental Beetle traps 

	Sharp-nosed Leafhopper				Oriental Beetle
	Atlantic County		Burlington County		Atlantic County		Burlington County
	Avg	High	Avg	High	Avg	High	Avg	High
6/6	1.42	16	1.25	7	5.78	35	2.57	14
6/12	0.56	12	4.8	46	62	340	47	170
6/20	0.88	6	1.44	12	411	2025	403	2025
6/27	0.77	9	0.37	2	243	2025	458	2025
7/3	1.5	15	0.55	2	466.7	2025	182.7	510
7/10	1.40	14	0.33	2	396	1970	393	2025
7/18	0.98	13	0	0	191.1	2025	235	1350
7/25	1.11	7	0.11	1	64.4	340	136.6	675

 

Scales: Crawler activity of both terrapin scale and Putnam scale slightly increased (Table 3). Monitoring will continue throughout the fall to detect the emergence of the second crawler generation and determine the appropriate timing for pesticide applications. Continued monitoring will help ensure that management recommendations are based on current pest activity and that insecticide applications are made when crawlers are most susceptible. Scale infestations on fruit decreased from previous weeks (Table 4). For scale management, target the second generation of crawlers with post-harvest applications of diazinon or pyriproxyfen (Esteem). 

Table 3. Scale Traps 

	Putnam Scale		Terrapin Scale
	Avg	High	Avg	High
5/23	36.85	230	1.8	8
5/29	65.17	352	21.2	41
6/6	136.25	402	75.25	84
6/12	164	639	96	202
6/20	102	288	85	167
6/27	45	193	32	119
7/3	41.7	315	27.5	46
7/10	16.26	74	24.6	61
7/18	6.06	25	12	24
7/25	10.5	73	11	24

 Table 4. Scale Infestation on Fruit 

	Scale % infestation on fruit
	Avg	High
6/12	0.13	2.1
6/20	0.19	5.7
6/27	0.06	1.5
7/3	0.06	1.8
7/10	0.07	3.1
7/18	0.02	0.9
7/25	0	0

The IPM team continues to observe anthracnose and Alternaria, likely associated with mechanical damage caused by picking machine activity.  

For recommendations on fungicide products, refer to:  

• the 2026 Commercial Blueberry Pest Control Recommendations for New Jersey 

• https://extension.rutgers.edu/sites/default/files/2026-03/bb-v42n01.pdf 

 

	% Mummy Berry Infested Fruit		% Anthracnose Infested Fruit		% Alternaria Infested Fruit
	Avg	High	Avg	High	Avg	High
6/20	0.03	0.9	0.06	2.5	0.004	0.7
6/27	0.007	0.3	0.08	2.2	0.07	3
7/3	0.005	0.2	0.227	4.1	0.07	1.2
7/10	0.002	0.1	0.20	2.5	0.13	3
7/18	0.001	0.1	1.23	13.1	0.43	9.3
7/25	0	0	0.42	2	0.11	0.6

 

Weeds

Last week, the IPM team monitored 86 fields for weed pressure. The predominant weed species observed across production fields were crabgrass and goosegrass. Based on current field conditions, postemergence herbicide selections should prioritize products with strong activity on annual grass species while considering the existing weed spectrum within individual fields. Refer to the 2026 Rutgers Blueberry Commercial Guide: https://njaes.rutgers.edu/pubs/publication.php?pid=e265 . 

Grape berry moth (GBM): Third-generation adult moths continue to be captured in pheromone traps placed in the vineyard. The timing to apply control for third-generation GBM is 1620-1710 DD from the biofix date of wild grape bloom (5/19 for Gloucester County). Consult the Grape berry moth NEWA model for the most accurate forecasting for your area. Consider treatment when 10% or more of the bunches show berry webbing and GBM larval feeding injury. To determine the percent injury, examine 10 bunches on 5 vines in 4 locations. Often, the greenish-brown larvae can be found inside the berry. See the Commercial Grape Pest Control Recommendations for New Jersey for management options. 

Spotted lanternfly (SLF): Adult SLF are present in vineyards. See this previous Plant & Pest Advisory post on Management of Spotted Lanternfly in New Jersey Vineyards.  

Grape root borer (GRB): Adults are active and flying in vineyards. Monitoring traps indicate the presence of GRB in the area, but only scouting around the bases of vines will indicate the presence of GRB in the vineyard. Adult moths will lay eggs July-August. Larvae will enter the soil and migrate to the roots, where they feed and cause damage. Dr. Anne Nielsen and the IPM team will be monitoring vineyards throughout the state to assess GRB population pressure in NJ. 

Monitoring for downy mildew and powdery mildew in NJ vineyards continues, but disease observations have been minimal. Botrytis has been observed. See the NJ Commercial Grape Production Guide for more information on disease management options. 

• Rots have been observed on fruit in southern and northern NJ counties (Figure 1).
  

  Figure 1. Bitter rot infection on maturing apple fruit.

  Broad-spectrum fungicides, such as captan and ziram, are effective. Captan alone may not adequately suppress severe summer disease pressure. Adding single-site products such as Merivon, Luna Sensation, Pristine, Omega, and Aprovia may improve control. The addition of phosphonate products such as ProPhyt or Rampart to captan sprays can improve control of rots and other summer diseases, including sooty blotch and flyspeck.

• Time applications ahead of the next rain event, where your fungicide coverage may be depleted.
• Where fire blight is present, it is appropriate to prune out infected shoots. Do not cut out infections during wet weather, as bacteria can spread through water. The recommendation is to cut back to last year’s growth, at least 12” back into healthy tissue, and to sterilize pruners between cuttings.
• Maintain coverage of captan, manzate, or ziram before rain events through the growing season according to the cover spray rule of applications every 2” of rain or 14 days, whichever comes first, to reduce the spread of foliar diseases, including Marssonina Blotch, Glomerella Leaf Spot, and Frogeye Leaf Spot. Foliar diseases can contribute to inoculum build-up in the orchard and significant defoliation of the canopy if left untreated.

Codling Moth (CM): Trap captures are increasing in some orchards, but on average, counts remain low for the second generation of codling moth. If you have applied your 2nd-generation insecticides and your trap counts are low (less than 5 moths per trap), additional treatments are not needed.

Scale: Second-generation San Jose scale typically emerges about mid-July. We have observed an increase in crawler activity at some locations. Monitor crawler activity by wrapping black electrical tape covered with double-sided sticky tape around branches with previous scale infestations (Figure 2).

Use a hand lens to detect crawlers on the tape. Control options during crawler emergence include Esteem (2 applications/year; 45-day PHI); Centaur (1 application/year; 14-day PHI); Diazinon 50W (2 applications/year; 21-day PHI); and Venerate (0-day PHI; Make two applications 7 days apart starting a week after crawler emergence). Neonicotinoids will have some suppression.

Woolly Apple Aphid (WAA); Green Apple (Spirea) Aphids (GAA): Populations on average remain below treatment levels. A treatment threshold is set at 50% of the terminals infested with live colonies. Predation by lady beetles and other predators and parasitoids has been observed and can help to maintain pest populations below damaging thresholds. Scout in known hotspots for WAA colonies now. Minimize the use of pyrethroids to manage insect pests, as they can knock down beneficial organisms and predators. Research from Dr. Monique Rivera at Cornell University has demonstrated good control of Sefina for WAA in late summer.

Brown Marmorated Stink Bugs: Brown Marmorated Stink Bugs are being captured in orchards statewide. Both adults and nymphs are present. See the NJ Tree Fruit Production guide for effective materials on harvesting fruit.

Dogwood borer: On average, moth captures in pheromone traps continue to decrease. If trap captures continue to be high in your orchard blocks, consider a coarse trunk application of Assail before August.

Average Trap Captures in Apple – Southern Counties

Week	STLM	TABM	CM	OFM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	18	11	6	3	25	2	–
5/18/2026	16	21	3	10	54	13	–
5/25/2026	1.3	23	2	2	71	7	–
6/1/2026	378	33	3	2	49	6	0.4
6/8/2026	258	11	2	1	61	21	1.2
6/15/2026	355	4	0.6	1.5	57	13	0.8
6/22/2026	178	5	0.6	2	54	8	1.2
6/29/2026	504	0.3	0.1	0.5	27	12	0.8
7/6/2026	202	1.1	1.6	0.6	25	7.5	0.6
7/13/2026	226	0.9	1	1	33	1	1.6

 

Average Trap Captures in Apple – Northern Counties

Week	STLM	TABM	CM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	13.7	1.5	1.8	12.8	1.1	–
5/18/2026	8.3	13.25	2.4	18.5	10.8	–
5/25/2026	2.2	13.75	1.2	24.5	5.1	–
6/1/2026	25.1	24.3	3.4	23.8	9.4	0.3
6/8/2026	94	22.3	0.3	24.6	18	1.4
6/15/2026	68	22.3	1	22.6	14	1.1
6/22/2026	105.9	35	0.7	27.2	8.2	0.5
6/29/2026	100	11.5	0.3	28.9	5.3	0.3
7/6/2026	50.2	7.3	0.6	26.4	5.2	0.2
7/13/2026	52.4	7	0.5	24.8	5.3	0.2

 

• Foliar diseases should be managed with Mancozeb or Ziram, plus a single-site fungicide, to maintain pressure and inoculum at low levels, protecting fruit and maintaining a healthy orchard going into the next season.
• Where fire blight is present, it is appropriate to prune out infected shoots. Prune out strikes on dry, cooler days, cut back 8-12” back into healthy tissue, and sterilize pruners between cuts.

Pear psylla: Adult populations have decreased compared to previous weeks. If adult psylla are present, options for control include Actara, Assail, and Belay (IRAC group 4A); Sivanto Prime (IRAC group 4D); Delegate (IRAC Group 5); and products containing abamectin (IRAC group 6).

• 

  Figure 3. Declining peach trees due to environmental stress.

   

  Brown rot is appearing in ripening fruit throughout the state. Highly effective rot materials include DMI’s Indar, Cevya, Orius, Quash, and Tilt (FRAC group 3), and Strobilurin materials including Merivon, Luna Sensation, Pristine, and Quadris Top (FRAC group 11), which should be applied beginning 3 – 4 weeks prior to harvest.

• There have been reports of declining peach trees exhibiting yellowing foliage, gummosis, and bark splitting. Several samples have been submitted to the Rutgers Plant Diagnostic Laboratory. There has been one report of Cytospora canker and some insect borer injury observed, but overall the damage and decline have been attributed to weather extremes, including drought and significant fluctuations in temperature that have made certain varieties or trees in certain low-lying locations more vulnerable to abiotic stress, and insect and disease injury (Figure 3). The recommendation is to maintain proper irrigation and fertilization and prune out any visible cankers. Be mindful of pruning practices and avoid mechanical damage to trees to minimize injury.

Oriental Fruit Moth (OFM): A biofix point for OFM was set on 4/2 for southern counties and 4/15 in northern counties. See below for timings for the third generation. Consider treatment if trap captures are above threshold (>8 moths per trap).

OFM 3rd Generation Timing Insecticide Type County/Region Degree Days by  7/20 base 45 Conventional 2100-2200 2450-2500 Intrepid/Rimon 2000-2100 2350-2450 Diamides/Virus 2025-2150 2375-2450 Gloucester – Southern 2406 1st –past 2nd – 7/22-7/24 1st –past 2nd – 7/18-7/22 1st –past 2nd – 7/19-7/22 Middlesex – Northern 2201 1st – 7/16-7/20 2nd – 7/28-7/30 1st – past 2nd – 7/25-7/28 1st – 7/15-7/18 2nd – 7/26-7/28

Japanese Beetles: Japanese beetles have been observed feeding significantly on foliage and fruit. Products containing imidacloprid (Admire Pro, Leverage 360) are effective and may be warranted to protect fruit through to harvest.

Scale: Second-generation White Peach Scale crawlers should emerge sometime this week or next. Second-generation San Jose Scale crawlers emerge about 7/17 +/- 8 days. Esteem is a good scale material that has a 14-day PHI for stone fruit. Centaur is also effective, has a 14-day PHI, and can be used only once during the growing season. Venerate has shown efficacy as a pre-harvest treatment against scale and has a 0-day PHI. If using Venerate to control scale insects, make 2 applications 7 days apart, starting a week after crawler emergence.

Tarnished plant bugs and other catfacing insects: Insects are active, but new fruit feeding injury has been minimal.

Brown Marmorated Stink Bugs: Nymphs are active, and numbers continue to increase in orchards statewide. See the NJ Tree Fruit Production guide for effective materials.

Mites: Outbreaks of mites have been observed in a few orchards as a result of hot and dry weather from the previous week. If left unchecked, mites can build up to the point where leaf bronzing is visible by mid- to late July. If leaf damage is heavy enough, next year‘s crop can even be affected. Consider treatment if more than 10 mites per leaf are observed. Control options include Apollo, Savey, Envidor, Nealta, and Nexter. Try to limit miticide use to one application per material class per season.

Average Trap Captures in Peach – Southern Counties

Week	OFM	TABM	LPTB	PTB	BMSB
5/11/2026	5	10	–	–	–
5/18/2026	4	20	–	–	–
5/25/2026	2	20	31	1	–
6/1/2026	4	46	28	3	0
6/8/2026	8	13	25	3	0.75
6/15/2026	5	6	13	3	0.75
6/22/2026	6	4	23	7	1
6/29/2026	3	0.2	16	6	2
7/6/2026	5	0.6	16	4	1.3
7/13/2026	9	1.4	18	7	3.5

 

Average Trap Captures in Peach – Northern Counties

Week	OFM	LPTB	PTB
5/11/2026	4.4	24	0
5/18/2026	2.4	16.5	0.2
5/25/2026	0.7	8.75	0.1
6/1/2026	1.8	11	0.5
6/8/2026	0.6	8.5	0.05
6/15/2026	3.5	9.7	1.2
6/22/2026	3.4	7.4	1.6
6/29/2026	2	4.6	1.1
7/6/2026	1.7	8.5	1.8
7/13/2026	0.5	2.8	3.7

 

Scouting was conducted last week across 75 conventional and organic blueberry fields in Burlington and Atlantic Counties. Monitoring of developing fruit indicated an overall decrease in pest activity, including feeding and oviposition by leafrollers, plum curculio, and cherry and cranberry fruitworms.

Aphids: Populations have declined significantly compared with previous weeks, likely due to recent weather conditions and the hardening of new shoot growth.

Spotted-wing drosophila: Trap captures slightly decreased in both Atlantic and Burlington Counties. SWD remains the primary target for insecticide applications (Table 1). For management recommendations for SWD in blueberry and other berry crops, reference Rutgers Cooperative Extension Factsheet FS1246 and SWD Insecticides for Berries.

Blueberry maggot: Adults are also present at low numbers, particularly in fields where picking and pesticide applications have slowed down.

Table 1. Spotted-Wing Drosophila and Blueberry Maggot traps

	Spotted-Wing Drosophila				Blueberry Maggot
	Atlantic County		Burlington County		Atlantic County		Burlington County
	Avg	High	Avg	High	Avg	High	Avg	High
6/6	8.99	35	2.86	7	0.03	1	0	0
6/12	9.9	46	3.7	25	0	0	0	0
6/20	10.24	48	8.22	35	0	0	0	0
6/27	6.96	78	3.6	18	0	0	0	0
7/3	29.78	273	50.9	81	0.33	27	0	0
7/10	31.2	130	86.1	177	0.15	12	0	0
7/18	28.3	110	59.3	125	0.07	5	0.16	1

 

Sharp-nosed leafhopper: Trap counts remain low (Table 2). 

Oriental beetle: Adults are actively in flight (Table 2).

Table 2. Sharp-nosed Leafhopper and Oriental Beetle traps

	Sharp-nosed Leafhopper				Oriental Beetle
	Atlantic County		Burlington County		Atlantic County		Burlington County
	Avg	High	Avg	High	Avg	High	Avg	High
6/6	1.42	16	1.25	7	5.78	35	2.57	14
6/12	0.56	12	4.8	46	62	340	47	170
6/20	0.88	6	1.44	12	411	2025	403	2025
6/27	0.77	9	0.37	2	243	2025	458	2025
7/3	1.5	15	0.55	2	466.7	2025	182.7	510
7/10	1.40	14	0.33	2	396	1970	393	2025
7/18	0.98	13	0	0	191.1	2025	235	1350

 

Scales: Crawler activity of both terrapin scale and Putnam scale declined over the past week (Table 3). Monitoring will continue throughout the fall to detect the emergence of the second crawler generation and determine the appropriate timing for pesticide applications. Continued monitoring will help ensure that management recommendations are based on current pest activity and that insecticide applications are made when crawlers are most susceptible. Scale infestations on fruit also decreased last week (Table 4). For scale management, target the second generation of crawlers with post-harvest applications of diazinon or pyriproxyfen (Esteem).

 

Table 3. Scale Traps

	Putnam Scale		Terrapin Scale
	Avg	High	Avg	High
5/23	36.85	230	1.8	8
5/29	65.17	352	21.2	41
6/6	136.25	402	75.25	84
6/12	164	639	96	202
6/20	102	288	85	167
6/27	45	193	32	119
7/3	41.7	315	27.5	46
7/10	16.26	74	24.6	61
7/18	6.06	25	12	24

 

Table 4. Scale Infestation on Fruit

	Scale % infestation on fruit
	Avg	High
6/12	0.13	2.1
6/20	0.19	5.7
6/27	0.06	1.5
7/3	0.06	1.8
7/10	0.07	3.1
7/18	0.02	0.9

 

The IPM team continues to observe anthracnose and Alternaria, likely associated with mechanical damage caused by picking machine activity.

For recommendations on fungicide products, refer to:

• the 2026 Commercial Blueberry Pest Control Recommendations for New Jersey
• https://extension.rutgers.edu/sites/default/files/2026-03/bb-v42n01.pdf

	% Mummy Berry Infested Fruit		% Anthracnose Infested Fruit		% Alternaria Infested Fruit
	Avg	High	Avg	High	Avg	High
6/20	0.03	0.9	0.06	2.5	0.004	0.7
6/27	0.007	0.3	0.08	2.2	0.07	3
7/3	0.005	0.2	0.227	4.1	0.07	1.2
7/10	0.002	0.1	0.20	2.5	0.13	3
7/18	0.001	0.1	1.23	13.1	0.43	9.3

 

Grape berry moth (GBM): Third-generation GBM is actively flying and laying eggs. The next timing to apply control for GBM is 1620-1710 DD from the biofix date of wild grape bloom (5/19 for Gloucester County). As of July 20, we are currently at 1659 DD (base 47.14°F) in Gloucester County. Consult the Grape berry moth NEWA model for the most accurate forecasting for your area. Consider treatment when 10% or more of the bunches show berry webbing and GBM larval feeding injury. To determine the percent injury, examine 10 bunches on 5 vines in 4 locations. Often, the greenish-brown larvae can be found inside the berry. See the Commercial Grape Pest Control Recommendations for New Jersey for management options.

Spotted lanternfly (SLF): Adult SLF were observed in southern county vineyards this week (Figure 4).

See this previous Plant & Pest Advisory post on Management of Spotted Lanternfly in New Jersey Vineyards.

Japanese beetle (JB): Pressure remains high throughout the state with considerable defoliation at some vineyards. See the NJ Commercial Grape Production Guide for more information on insecticides effective for JB.

Grape root borer (GRB): Adults are active and flying in vineyards. Monitoring traps indicate the presence of GRB in the area, but only scouting around the bases of vines will indicate the presence of GRB in the vineyard (Figure 5).

Adult moths will lay eggs July-August. Larvae will enter the soil and migrate to the roots, where they feed and cause damage. Dr. Anne Nielsen and the IPM team will be monitoring vineyards throughout the state to assess GRB population pressure in NJ.

 

• Botrytis has been observed in developing bunches.
• Incidence of downy mildew and powdery mildew has been low in NJ vineyards.
• See the NJ Commercial Grape Production Guide for more information on disease management options.

• Hot, humid weather will increase the risk of fruit rots, including white rot, bitter rot, black rot, sooty blotch, and flyspeck. Bitter rot symptoms have been observed in southern and northern NJ counties. 
• There is likely to be significant shoot vigor this growing season if there is little to no crop load. Cultural control practices will help address excessive growth and minimize the impact of disease in orchards: prune to improve air circulation, thin fruit clusters to reduce humidity and inoculum buildup, and cut out cankers that serve as inoculum sources. 
• Broad-spectrum fungicides, such as captan and ziram, are effective. Captan alone may not adequately suppress severe summer disease pressure. Adding single-site products such as Merivon, Luna Sensation, Pristine, Omega, and Aprovia may improve control. The addition of phosphonate products such as ProPhyt or Rampart to captan sprays can improve control of rots and other summer diseases, including sooty blotch and flyspeck.  
• Where fire blight is present, it is appropriate to prune out infected shoots. Do not cut out infections during wet weather, as bacteria can spread through water. The recommendation is to cut back to last year’s growth, at least 12” back into healthy tissue, and to sterilize pruners between cuttings.  
• Maintain coverage of captan, manzate, or ziram before rain events through the growing season according to the cover spray rule of applications every 2” of rain or 14 days, whichever comes first, to reduce the spread of foliar diseases, including Marssonina Blotch, Glomerella Leaf Spot, and Frogeye Leaf Spot. Foliar diseases can contribute to inoculum build-up in the orchard and significant defoliation of the canopy if left untreated. 

Codling Moth (CM): On average, trap captures remain low for the second generation of codling moth in orchards. Consider management if >5 moths are caught per trap. 

	Codling Moth Degree Day Timing – Second Generation
		Application and Insecticide Type
County Area	Biofix	Rimon:  75-100DD + 14-17 days later		Intrepid  1150 + 1450 DD  Diamides – Altacor, Voliam mixes: (150-200 DD)		Madex  1250 DD + every 7-9 days during brood hatch (later if first spray is an IGR)	Standard Insecticides -  Delegate, Avaunt, OP’s, carbamates, pyrethroids  1250 DD + 1550 DD
DD				1150	1450	1250	1250	1550
Southern	April 20	N/A	N/A	past	past	past	past	7/13
Northern	May 5	N/A	N/A	past	7/14	past	past	7/17

 

Scale: Crawlers continue to be active; however, on average, activity has decreased. Control options during crawler emergence include Neonicotinoids (suppression only), Sivanto, Esteem, and Centaur. See also the scale discussion under the peach section.  

Woolly Apple Aphid (WAA); Green Apple (Spirea) Aphids (GAA): Populations on average remain below treatment levels. A treatment threshold is set at 50% of the terminals infested with live colonies. Predation by lady beetles and other predators and parasitoids has been observed and can help to maintain pest populations below damaging thresholds. Scout in known hotspots for WAA colonies now. Minimize the use of pyrethroids to manage insect pests that can knock down beneficial organisms and predators. Research from Dr. Monique Rivera at Cornell University has demonstrated good control of Sefina for WAA in late summer. 

Potato leafhopper (PLH): Where adults and nymphs are present, consider treatment, particularly on young, non-bearing fruit trees. The preferred materials for leafhopper control include Actara, Admire, Assail, Belay, Endigo, and Voliam Flexi. 

Dogwood borer: Moth captures in pheromone traps continue to decrease. If trap captures continue to be high in your orchard blocks, consider a coarse trunk application of Assail before August.  

 

Average Trap Captures in Apple – Southern Counties  

Week	STLM	TABM	CM	OFM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	18	11	6	3	25	2	–
5/18/2026	16	21	3	10	54	13	–
5/25/2026	1.3	23	2	2	71	7	–
6/1/2026	378	33	3	2	49	6	0.4
6/8/2026	258	11	2	1	61	21	1.2
6/15/2026	355	4	0.6	1.5	57	13	0.8
6/22/2026	178	5	0.6	2	54	8	1.2
6/29/2026	504	0.3	0.1	0.5	27	12	0.8
7/6/2026	202	1.1	1.6	0.6	25	7.5	0.6

 

Average Trap Captures in Apple – Northern Counties  

Week	STLM	TABM	CM	DWB	AMBROSIA BEETLE	BMSB
5/11/2026	13.7	1.5	1.8	12.8	1.1	–
5/18/2026	8.3	13.25	2.4	18.5	10.8	–
5/25/2026	2.2	13.75	1.2	24.5	5.1	–
6/1/2026	25.1	24.3	3.4	23.8	9.4	0.3
6/8/2026	94	22.3	0.3	24.6	18	1.4
6/15/2026	68	22.3	1	22.6	14	1.1
6/22/2026	105.9	35	0.7	27.2	8.2	0.5
6/29/2026	100	11.5	0.3	28.9	5.3	0.3
7/6/2026	50.2	7.3	0.6	26.4	5.2	0.2