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Corn
Volume 60 Number 1 Date 04/23/2015 BLACK CUTWORM - Moths first arrived in the state three weeks ago, appearing in traps in Columbia and Dane counties on April 1. Counts since then have been low and no significant migration has been noted. The 2015 monitoring network consisting of 42 traps across Buffalo, Columbia, Dane, Dodge, Dunn, Eau Claire, Grant, Iowa, Jackson, Jefferson, Lafayette, Monroe, Pepin, Pierce, Rock and Waukesha counties has thus far registered a cumulative total of only 33 moths. A projection of peak corn cutting dates will be determined once the first sustained capture of nine or more moths in two nights is documented. TRUE ARMYWORM - Counts in black light and pheromone traps have been low as of April 22. The first moths of the 2015 season were registered at Janesville from April 8-14, which was one week earlier than their April 21 arrival date last year. Another 12 moths were captured this week. Cover crops and spring-killed alfalfa will provide attractive oviposition sites for migrant moths arriving next month, as will small grains. No-tillage fields previously in sod or with small grain cover crops that were not burned down with herbicides early enough in spring usually experience greater problems with true armyworm relative to conventional tillage fields. -- Krista Hamilton, DATCP Entomologist 
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