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Volume 63 Number 1 Date 05/03/2018


SPOTTED TENTIFORM LEAFMINER - The first moth flight began by April 17 in southwestern Wisconsin. Counts this week were variable, with most orchards capturing relatively few STLMs and others reporting moderate weekly catches of 200-525 moths. Peak emergence or trap catch of spring adults is approaching and should occur at advanced sites during the third or fourth week of May.

EASTERN TENT CATERPILLAR - Egg hatch is underway statewide with the accumulation of 50 degree days (modified base 50°F). The characteristic tents should become increasingly visible on wild cherry, apple, flowering crabapple and other host trees in the next two weeks. Control is most effective while the larvae and tents are still small.

REDBANDED LEAFROLLER - Moths are appearing in pheromone traps across the southern and central counties. Counts since mid-April have ranged from 0-176 per trap and the first peak flight is unlikely to occur for two more weeks.

-- Krista Hamilton, DATCP Entomologist


MIDWEST STINK BUG ASSISTANT APP - Apple growers participating in the 2018 BMSB monitoring program are encouraged to download the BMSB identification app developed by the University of Minnesota Extension IPM Program, in partnership with the Minnesota Invasive Terrestrial Plants and Pests Center and Purdue University. The free app, Midwest Stink Bug Assistant, facilitates early detection and reporting of the invasive BMSB, and also helps users identify common native stink bug species. Other features include a stink bug "look alike" page to distinguish stink bugs from non-stink bugs; high-quality, high resolution images; and the option to review and report if a suspected BMSB specimen is found through the "Report Invasive" feature. Once a bug has been reported, a stink bug expert will be contacted to verify the identification. The app is available in both Apple and Android platforms.

-- Bill Hutchison, Theresa Cira and Bob Koch, UMN Extension