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Corn
Volume 60 Number 2 Date 04/30/2015 BLACK CUTWORM - The annual black cutworm migration has to date yielded only 42 moths in 42 traps, with a cumulative high count of 18 moths reported from Janesville in Rock County. The moths originated in the south-central U.S. and were carried into the state on storm fronts beginning April 1. Based on the very low number of moths arriving this month, the risk of cutworm damage to emerging corn appears low for now. This forecast could change with an influx of moths in early May. The map below summarizes moth counts for the period of April 23-29. EUROPEAN CORN BORER - According to the results of last fall's survey, the overwintered generation of larvae should produce an extremely small flight of moths next month. The annual European corn borer survey documented a statewide average of only 0.03 borer per plant or three per 100 plants, tying 2012 for the lowest fall population in the last 73 years. Pupation is likely to begin by May 2 in the Janesville and Spring Green areas of southern Wisconsin. -- Krista Hamilton, DATCP Entomologist 
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