MN Fruit & Vegetable IPM News - Vol. 2, No. 13

Corn Earworm (CEW) & European Corn Borer (ECB): We continue to see increased CEW activity across southern Minnesota (see Fig. 1). At Blue Earth (Faribault Co.), CEW moth catch has been very high, with 362 moths caught on August 11. We harvested our third date in our sweet corn planting date trial (planted June 2) at Rosemount, MN. We found 2 ears out of 100 with early instar CEW larvae, and 1 ear out of 100 with early instar ECB larvae. The CEW moth catch during the silk stage of this corn was >2/night, and the ECB moth catch was 5-14/night. ECB activity has remained low across the state, with the exception of St. James (Watonwan Co.), where they continue to catch 30-50 moths/night.

Check current ECB and CEW trap catch data at the Weekly Moth Catch site: http://www.vegedge.umn.edu/2005/moth.htm

Cabbage Looper (CL): Cabbage looper moths continue to be caught in pheromone traps at Rosemount, MN. Plant samples this week indicated the infestation has declined to a level of 10% of plants with eggs, and 10% of the plants with small larvae.

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ACKNOWLEDGEMENTS

Co-Editors: Bill Hutchison (hutch002@umn.edu), Department of Entomology, University of Minnesota, Jeanne Ciborowski, Minnesota Department of Agriculture, Ag. Resources Management and Development Division, and Suzanne Wold-Burkness (woldx018@umn.edu), Department of Entomology, University of Minnesota

The Newsletter is published weekly from May through August, cooperatively, by the Minnesota Department of Agriculture (MDA) and the University of Minnesota (U of MN). Reports are posted on the U of MN and MDA web sites on Fridays. If you have suggestions and/or comments, please send your contributions by 4 p.m., Wednesday to Jeanne Ciborowski, 651-297-3217, jeanne.ciborowski@state.mn.us , MDA, 90 W. Plato Blvd., St. Paul, MN 55107-2094. You can access the Newsletter at the U of MN web site in htm format at: www.vegedge.umn.edu/MNFruit&VegNews/mnindex.htm and at the MDA web site in pdf format at: www.mda.state.mn.us/biocon/fruitreports/

Partial funding for this publication is provided through partnership agreements with the Minnesota Fruit and Vegetable Growers Association (MFVGA) and the United States Department of Agriculture – Risk Management Agency (RMA). These institutions are equal opportunity providers.

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Reference to products in this publication is not intended to be an endorsement to the exclusion of others which may have similar uses. Any person using products listed in this publication assumes full responsibility for their use in accordance with current manufacturer directions.

The University, including the Minnesota Extension Service, is an equal opportunity educator and employer. ©1999-2005 Minnesota Extension Service, University of Minnesota. All rights reserved. Contact copyright@extension.umn.edu for information on reproduction or use of this material.