Integrated Crop Management News
 

Document Type

Article

Publication Date

5-21-2012

Abstract

Corn rootworm egg hatch in Iowa can occur from late May to the middle of June, depending on accumulating soil degree days, but the average hatching date is around June 6th. Research suggests about 50 percent of egg hatch occurs between 684-767 degree days (base 52°F, soil). Although Iowa had a warmer than normal March, soil temperatures have been closer to normal in April and May. So the 2012 predicted corn rootworm egg hatch is only slightly ahead of normal (Photo 1), but about two weeks ahead of the 2011 growing season. The southwest region in Iowa is experiencing 50 percent egg hatch now and other parts of the state will approach it within 7-14 days depending on the temperature. Other states have also reported that corn rootworm egg hatch is underway. Illinois is reporting the earliest initial egg hatch in 35 years.

Copyright Owner

Iowa State University

Language

en

File Format

application/pdf

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The Iowa State University Digital Repository provides access to Integrated Crop Management News for historical purposes only. Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user. Users should make their own assessment of the information and whether it is suitable for their intended purpose. For current information on integrated crop management from Iowa State University Extension and Outreach, please visit https://crops.extension.iastate.edu/.