Integrated Crop Management News

Document Type


Publication Date



Stalk borer larve are developing in grassy areas across Iowa. They feed inside the culms of grasses and also in the stems of giant ragweed, marijuana, and other plants commonly found in fencerows, terrace backslopes, and grassed waterways. The larvae feed until they outgrow the grass or plant stem housing them, forcing them to move to new feeding sites, such as corn plants. Thus, damage is often limited to border rows that are adjacent to grassy, weedy areas. "Moving day" for the stalk borers starts when approximately 1,300 base-41 degree days have accumulated.

Copyright Owner

Iowa State University



File Format





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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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