Integrated Crop Management News
 

Document Type

Article

Publication Date

5-31-1999

Abstract

Seedling corn is attacked each spring by a variety of caterpillars. Identification is the first step in integrated pest management in determining if there is a potential problem from insects. This article discusses how to identify caterpillars most likely to be found in Iowa corn and the injury they cause to seedling plants. Black cutworms less than 0.5 inch in length feed on leaves, whereas larger larvae can cut or drill plants. Almost all cutworm damage to corn is caused by this caterpillar. Cutting can occur below the surface when soil is dry, or above ground when soil is wet and tight around the plant. Cutting rarely occurs after the fifth true-leaf stage but cutworms may drill into the side of larger stalks. The black cutworm does not overwinter in Iowa. Eggs are laid in the spring when adults fly into Iowa from southern states.

Copyright Owner

Iowa State University

Language

en

File Format

application/pdf

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Disclaimer

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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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