Fruit IPM Report July 29, 2025

Peach:

Diseases:  Brown rot: Brown rot is appearing in ripening fruit throughout the state. Highly effective rot materials such as DMI’s (FRAC group 3) and Strobilurins (FRAC group 11) should be applied beginning 3 – 4 weeks prior to harvest. See the NJ Commercial Tree Fruit Production Guide for more information.

Tarnished Plant Bugs; and Other Cat-facing Insects: Cat-facing insects remain active in orchards. The percent fruit injury observed remains low (average <1%).

Oriental Fruit Moth: A biofix point for OFM was set on 4/2 for southern counties and 4/17 in northern counties. See below for timings for third generation.

Figure 1. San Jose scale crawlers (orange motile insects) on peach. Photo by Dave Schmitt.

Scale Insects: Numbers of scale crawlers on traps in southern county orchards are increasing indicating the second generation has emerged (Figure 1).

Crawler emergence will continue through August. Esteem and Centaur are both good scale materials that should be applied at the start of crawler emergence. These materials should only need one application. Other options include: Assail, Belay, Actara (Group 4A): Closer (Group 4C); Sivanto (Group 4D) and Venerate. These products may need more than one application. Venerate is a good option as a pre-harvest treatment with a 0-day PHI.

Japanese Beetles: Japanese beetles and June bugs have been observed feeding on fruit throughout the state. Adults are attracted to ripening fruit. Insecticides that are effective against Japanese beetles and june bugs are products that contain imidacloprid (Admire pro and Leverage 360), Danitol, and Sevin.

Apples and Pears:

Figure 2. Bitter rot infection on maturing apple fruit.

Diseases: Various rots but mostly bitter rot is present in orchards throughout the state (Figure 2).

Research has suggested products such as Merivon, Luna Sensation, Inspire Super, Omega, and Aprovia are effective rot materials to be alternated with broad-spectrum fungicides such as captan and ziram. Phosphorous acid products such as Prophyt or Rampart can be added to captan sprays to improve control.

Brown Marmorated Stink Bugs: Brown Marmorated Stink bugs are being captured at low levels in orchards statewide. Both adults and nymphs are present. See the NJ Tree Fruit Production guide for effective materials.

Codling Moth (CM): Second generation timings are updated below. Adult male trap captures continue and increased slightly in some southern county orchards last week. Additional applications should be made if trap captures exceed 5 moths/trap.

Scale Insects: See earlier statement on scale insects in peaches.

Phenology Table: Based on annual observations made in Gloucester County.

Tree Fruit Trap Captures – Southern Counties

Tree Fruit Trap Captures – Northern Counties

Grape: Grapes are beginning veraison in southern counties. Third generation grape berry moths are actively flying and larvae have been observed feeding in grape bunches.

Figure 3. Downy mildew on the underside of a grape leaf.

Refer to the Commercial Grape Pest Control Recommendations for New Jersey for management options. Spotted lanternfly adults are now being reported in vineyards in southern NJ. Japanese beetles are actively feeding on foliage. Stink bugs have also been observed in vineyards in southern counties. Disease management continues to focus on downy mildew (Figure 3).

Blueberry: Spotted-wing drosophila trap captures remain high at an average of 52 males and 35 in Atlantic and Burlington Counties, respectively. Treatments for spotted-wing drosophila should continue on a 7-day schedule where susceptible fruit remain in the field. For management recommendations, refer to Commercial Blueberry Pest Control Recommendations for New Jersey. For weekly reports on blueberry pests and recommendations read the Rutgers Blueberry Bulletin.