Fruit IPM Report for Week of 6/22/2026

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. See the New Jersey Commercial Tree Fruit Production Guide for more information.

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: Where psylla adults are still being found, 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). Other options include Movento (IRAC Group 23). The addition of 0.25-1 gal of summer oil may improve control. Avoid applying oil at high temperatures, and do not mix with captan. Be sure to read and follow the label instructions for adding penetrants to products.

Bacterial spot: This disease is still present in some orchards and can be found on developing fruit (Figure 6).

Figure 6. Bacterial spot on developing peach fruit.

Peach scab: Maintain good coverage with captan or other effective fungicides until July in orchards where scab was previously an issue.

Brown Rot: Most growers should rely on a captan-based program for mid-season covers, followed by better materials during the last 3 weeks pre-harvest when fruit is present. See the NJ Commercial Tree Fruit Production Guide for more information.

Oriental Fruit Moth (OFM): A biofix point for OFM was set on 4/7 for southern counties and 4/15 in northern counties. Treatment timings targeting the second generation are shown in the table below.

Japanese Beetles: Japanese beetles have been observed feeding in orchards. Products containing imidacloprid (Admire Pro, Leverage 360) are effective and have a short preharvest interval.

Scale: Crawler emergence is active in orchards across the state. If crawlers are present, treatment options include Movento, Esteem, Centaur, Sivanto, and neonicotinoids (for suppression only). Movento, Esteem, and Centaur should be applied at the start of crawler emergence.

Thrips: We continue to observe moderate thrips activity in orchards throughout the state. Delegate or Entrust at the highest labeled rate are the usual recommended materials for thrips present in stone fruit. Lannate also has activity on thrips. These materials all have short PHI’s and may be applied close to harvest where injury is observed.

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

Lesser and Greater Peach Tree Borers: We continue to trap high numbers of both species. If this has been a historical pest in your orchard, mating disruption is recommended. Continue monitoring and managing as usual in problem blocks with mating disruption or trunk sprays.

Average Trap Captures in Peach – Southern Counties

Average Trap Captures in Peach – Northern Counties

Scouting was conducted last week across 180 commercial and organic blueberry fields in Burlington and Atlantic Counties. Field evaluations focused primarily on inspecting fruit for insect injury and assessing aphid infestations on new vegetative terminals. Aphid populations increased compared with the previous week, although average colony sizes remain low, with approximately 1–5 aphids per infested shoot (Table 1).

Table 1: Aphid Infestation on New Terminals

Trap Monitoring

Although spotted-wing drosophila trap captures remain low compared to previous years, SWD remains the primary target for insecticide applications at this time (Table 2). For management recommendations for SWD in blueberry and other berry crops, reference Rutgers Cooperative Extension Factsheet FS1246 and SWD Insecticides for Berries.

Table 2. Spotted-Wing Drosophila and Blueberry Maggot Traps

Table 3. Sharp-nosed Leafhopper and Oriental Beetle Traps

Scale: We continue to monitor scale crawler activity for both terrapin scale and Putnam scale. We observed a decline in crawler activity (Table 4) and scale infestations on fruit (Table 5).

Table 4. Scale Traps

Table 5. Scale infestation on fruit

The IPM team has observed anthracnose on ‘Duke’ blueberries, as well as mummy berry and Alternaria fruit rot. Alternaria incidence can increase due to injuries from mechanical harvesting, which create entry points for infection.

For blueberry production and management recommendations, please reference the recently revised 2026 Commercial Blueberry Pest Control Recommendations for New Jersey.

We continue to capture Grape berry moth in pheromone traps, which have slightly increased in number, indicating adults are actively in flight. Applications for GBM using Intrepid or Diamides should be made at 810 DD base 47°F from wild grape or native grape varieties (Concords were at trace bloom on 5/19 in southern counties). Other effective materials can be applied a few days later. We are past the projected treatment window as predicted by the NEWA Grape Berry Moth model; however, you can monitor bunches to determine if further treatment is needed. Check especially on edge rows near the woods. If 5% of clusters show damage, then treatment is justified.

Japanese beetle pressure is increasing in vineyards throughout the state. Vines with well-developed canopies can withstand some Japanese beetle pressure, but where vines are stressed and vigor is reduced, see the NJ Commercial Grape Production Guide for more information on insecticides effective against this pest.