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Fruits
Volume 63 Number 3 Date 05/17/2018 REDBANDED LEAFROLLER - The spring flight has increased and egg deposition is well underway. Larvae will begin emerging next week. Sampling for the early-instar caterpillars on foliage and watersprouts is recommended 10-12 days after the first moths are trapped. Late-instar larvae and pupae can be found by searching for folded leaves. An important distinguishing feature of the RBLR larva is its uniform coloration (both the body and head are yellowish-green). Other leafrollers have black or dark heads. PLUM CURCULIO - Overwintered weevils have resumed their migration into orchards with recent warm temperatures. Early blooming varieties such as 'Gala', 'McIntosh' or 'Paulared' should be checked for evidence of feeding and oviposition during the first 14 days after petal fall. CODLING MOTH - Apple growers are reminded to place pheromone traps now to detect the first spring moths. Emergence could begin this weekend (May 19-20) in locations where nightly temperatures exceed 62°F. Daily monitoring over the next two weeks will be required to document the "biofix" or first sustained male moth capture. ROSY APPLE APHID - Egg hatch has begun and will continue for about two weeks. Scouting orchard blocks or cultivars with past aphid damage is advised starting in the week ahead. Aphid sprays should not be applied if trees are in bloom. SPOTTED TENTIFORM LEAFMINER - First-generation moths have been active since late April, and peak emergence likely occurred this week at several southern orchard locations. Populations are now transitioning into the larval stages. The optimal sample period for sapfeeder larvae is 10-14 days after a peak capture (usually 800-1,200 moths) is registered. Pheromone trap counts during the last week ranged widely from 0-1,130 moths, with the high reported from Oneida in Brown County. OBLIQUEBANDED LEAFROLLER - Larvae are appearing after overwintering under the bark of scaffold limbs and twigs. The ¼-inch, yellowish-green caterpillars with black head capsules will feed for 2-3 weeks before pupating within leaf tubes. Apple growers should set OBLR traps by early next week. -- Krista Hamilton, DATCP Entomologist 
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