Tree Fruit IPM Report August 20, 2024

Peach:

Tarnished Plant Bugs; and Other Catfacing Insects: BMSB and native catfacing insects remain very active. Some recent fruit feeding has been observed.

Scale Insects: Second generation san jose scale and white peach scale crawlers began emergence in late July and will continue through August. Late season treatments include Actara (14 day PHI); Esteem (14 day PHI), Centaur (14 day PHI), Diazinon (postharvest as per label), and Venerate (2 applications 0 day PHI).

Apples and Pears:

Diseases: Summer diseases such as fruit rots (esp. Bitter rot), and sooty blotch and fly speck are the key pests at this point. Bitter rot control has been difficult at best in recent years even where management programs have been rigorous. Summer and late season fungicides for summer diseases include: Merivon, Luna Sensation, Inspire Super, Topsin-M, captan and ziram. Experience has suggested that the addition of phosphorous acid products such as Prophyt or Rampart to captan sprays may improve control. Observations are that these phosphite products improve control of other summer diseases such as sooty blotch and flyspeck, and may help suppress scab infections where present. Bitter rot symptoms have been appearing for several weeks in southern counties. Symptoms continue to increase in sensitive varieties.

Scale Insects: San jose scale crawlers continue emergence. Actara (suppression) has a 35 Day PHI at rates effective for scale on pome fruit. Belay (suppression) has a 7 day PHI. Esteem has a 45 day PHI on Pome fruit. Centaur has a 14 day PHI. Diazinon (suppression) has a 21 day PHI with a 96 hour reentry.

Brown Marmorated Stink Bug: BMSB nymphs have been seen feeding in some apple and pear blocks. Trap captures have increased in some orchards. Effective materials include Brigade, Belay, Leverage, Mustang Max and Venerate at 2 qts.

Codling Moth (CM): The first generation codling moth timings have ended. Trap captures continue at low levels in southern county orchards. Growers with trap captures above 5 moths/trap should still use effective materials within label restrictions.

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

Tree Fruit Trap Captures – Southern Counties

Tree Fruit Trap Captures – Northern Counties