May 8, 2006
I have received only one report of significant alfalfa weevil injury. However, it would be wise to continue to monitor alfalfa for this pest. For details on scouting for and managing this insect, see pages 22-23 of the April 19, 2004 Integrated Crop Management (ICM) Newsletter http://www.ipm.iastate.edu/ipm/icm/2004/4-19-2004/. Also, watch http://www.extension.iastate.edu/Pages/eccrops/insect.html for updated information on the development of this and other insects during 2006.
Scout for Black Cutworms
Black cutworms do not
over winter in
Based on moth captures and temperatures, cutting, if it occurs, should begin very soon. I am already receiving scattered reports of cutting. See pages 105 106 of the May 1, 2006 ICM Newsletter or http://www.ipm.iastate.edu/ipm/icm/2006/5-1/cutworms.html for scouting and management details. Additional information is at http://www.extension.iastate.edu/Pages/eccrops/blackcutworm.html.
Corn Flea Beetles
The mild temperatures of last winter suggest potential problems with corn flea beetles attacking seedling corn further north than normal. Monitor corn for this pest from emergence through V5. See pages 90 91 of the April 17, 2006 ICM Newsletter or http://www.ipm.iastate.edu/ipm/icm/2006/4-17/stewarts.html and pages 63 - 64 of the May 7, 2001 ICM Newsletter or http://www.ipm.iastate.edu/ipm/icm/2001/5-7-2001/fleabeetleexpect.html for scouting and management details.
Bean Leaf Beetles
As some early-planted soybean fields emerge, large numbers of Bean Leaf Beetles are moving in. So, as soybeans emerge, be sure to scout for this insect. See pages 81 82 of the May 27, 2002 ICM Newsletter or http://www.ipm.iastate.edu/ipm/icm/2002/5-27-2002/manageblb.html for scouting, threshold, and management information. In addition to the management strategies offered there, remember that Gaucho 480 and Cruiser 5FS seed treatments offer good protection. Additional information can be found at http://www.extension.iastate.edu/Pages/eccrops/blb3.html.
If you have any questions, please feel free to contact the Iowa State University Extension Office.
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