Search Results for: spotted lanternfly

Peach:

Oriental Fruit Moth: A biofix point for OFM was set on 4/2 in southern counties, and on 4/17 in northern counties. The third generation timings are over in all regions. Additional treatments should be made if trap captures are over 6 moths per trap.

Scale Insects: Scale crawler emergence is past peak and declining. White Peach scale has a third generation in September and San Jose scale may have a third generation in October. 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.

Apples and Pears:

Diseases: Summer scab, rots and sooty blotch and fly speck are the main targets at this time. Captan plus a phosphorous acid like Prophyt can slow scab development as well as provide good summer disease control. Merivon and Luna Sensation are effective materials for summer diseases to use close to harvest.

Figure 1. Brown marmorated stink bug first instar nymphs recently emerged from egg masses. Photo by Kaitlin Quinn.

Brown Marmorated Stink Bugs: Brown Marmorated Stink bugs are present at low to moderate levels in orchards statewide (Figure 1). See the NJ Tree Fruit Production guide for effective materials.

Codling Moth (CM): A biofix was set for CM on April 28^th in southern counties, and April 30 in Northern counties. Second generation treatments according to the degree day model are now over. Additional treatments should be made if trap captures are over 5 moths/trap. Some orchards have had continuing trap captures above threshold.

Scale Insects: For San Jose scale see the peach section above.

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

Tree Fruit Trap Captures – Southern Counties

Tree Fruit Trap Captures – Northern Counties

Grapes:

Diseases: Grapes are beginning veraison in southern counties. Disease management continues to focus on downy mildew (Figure 2), and also powdery mildew, bunch rot, and black rot. Refer to the NJ Commercial Grape Production Guide for information on control.

Figure 2. Downy mildew on grape.

Grape Berry Moth: The timing for the third generation is past. In some hot summers a fourth generation may occur; however no further treatments should be needed, especially where insecticides are being applied for Spotted lanternfly.

Spotted Lanternfly: Spotted lantern fly adults are now appearing in vineyards. As we move into September adult migration will increase and at that point growers should apply materials with long residual efficacy. More information on biology and control can be found from Penn State.

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.

For weekly reports on blueberry pests and recommendations read the Rutgers Blueberry Bulletin.

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.