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Fruits
Volume 60 Number 3 Date 05/07/2015 SPOTTED TENTIFORM LEAFMINER - Moths of the spring flight have been active for five or more weeks, and peak emergence has occurred at several orchard sites. Populations are now transitioning into the larval stages. The optimal sample period for first generation sapfeeder larvae is 10-14 days after a peak capture is registered. Pheromone trap counts for the period of April 30-May 6 ranged widely from 0-1,085 moths, with the high count reported from Edgar in Marathon County. REDBANDED LEAFROLLER - Larvae are emerging in areas of the state where 228 degree days (simple base 45°F) have accumulated, including much of southern Wisconsin. The first RBLR caterpillars generally appear around petal fall, which is when scouting should commence. Treatments specifically for this apple pest and the STLM are usually not required. CODLING MOTH - The first sustained capture of moths on consecutive nights, referred to as the "biofix", is anticipated in the next two weeks. Daily monitoring of traps is advised until the biofix date is established. OBLIQUEBANDED LEAFROLLER - Pheromone traps should be in place to detect the first OBLR moths of the season. Larvae have resumed activity after overwintering under the bark of scaffold limbs and twigs and will first appear as ¼-inch, yellowish-green caterpillars with black head capsules feeding on blossoms and shoots. Early signs of feeding should be evident next week. -- Krista Hamilton, DATCP Entomologist 
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