MN Fruit & Vegetable IPM News - Vol. 1, No. 5

Even though it has been wet, and we have been experiencing cooler temperatures, degree days (DD) continue to accumulate, and insects are continuing to feed and develop. Therefore, once it warms up and the rain stops, you should resume monitoring your crops as soon as possible to assess any damage or infestations that have occurred while you were unable to enter fields. The first flight of European corn borer (ECB) moths should begin as soon as night time temperatures warm up. As of May 31 st, we had accumulated 375 DD’s at Rosemount, MN, which should indicate the first flight is right around the corner (see related article by Bill Hutchison).

For seed corn maggot (SCM), on May 31 st, we were at 508 DD’s. On May 28, 6 out of 20 snap bean seeds were damaged by SCM, and most maggots were early instars. By June 2, we found 10 out of 15 damaged snap bean seeds/plants, and all maggots were later instars. This level of damage is higher than that of our 1 st planting date. Delayed emergence caused by cooler temperatures may have allowed SCM more time to find and damage seed.

For more information, see the May 17 and May 24 articles at:
http://www.vegedge.umn.edu/MNFruit&VegNews/Vol1/517veginsect.htm
http://www.vegedge.umn.edu/MNFruit&VegNews/Vol1/524veginsect.htm

Bean leaf beetle numbers continue to increase at Rosemount, MN. Snap beans and soybeans should continue to be monitored closely.

17-Year Periodical Cicada: It's Not Here, but...
Like us, you may be getting some scary stories about Cicada attacks from Ohio to Maryland to Georgia. To provide some accurate information to all of your relatives living south and southeast of MN, check out the University of Michigan Web Site at: http://insects.ummz.lsa.umich.edu/fauna/Michigan_Cicadas/Periodical/Index.html

Return to index

ACKNOWLEDGEMENTS

Co-Editors: Bill Hutchison, Department of Entomology, University of Minnesota, hutch002@umn.edu
Jeanne Ciborowski, Minnesota Department of Agriculture, Ag. Resources Division,jeanne.ciborowski@state.mn.us
Suzanne Wold-Burkness, Department of Entomology, University of Minnesota, woldx018@umn.edu

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., Tuesday 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/default.htm

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

DISCLAIMER

References 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.

Last Revised June 4, 2004.
The University, including the Minnesota Extension Service, is an equal opportunity educator and employer. ©1999-2004 Minnesota Extension Service, University of Minnesota. All rights reserved. Contact copyright@extension.umn.edu for information on reproduction or use of this material.