Integrated Crop Management News
 

Document Type

Article

Publication Date

7-16-2007

Abstract

On late planted corn, you may notice injury to the leaves that is unfamiliar to you. The leaf may have a "frosted" or dried appearance, particularly along the leaf edge and near the tip. Even though this may appear as some unrecognized plant pathogen, actually what you are seeing is the feeding injury from adult western corn rootworms. When the beetles emerge from the soil, often there are no tassels or silks for the insects to feed on in these late-planted fields. So the beetles will crawl down inside the whorl where they will feed on the tender new leaves. The feeding scars become evident when the leaf eventually emerges and unfurls. The scars run parallel to the leaf veins and may extend 12-15 inches or more along the leaf edge. Occasionally, the beetles will cut through the leaf, which causes long tears in the leaf.

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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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/.