Integrated Crop Management News
 

Document Type

Article

Publication Date

4-17-2006

Abstract

Somewhere in Iowa this spring, alfalfa weevil populations will exceed economic thresholds and cause significant yield loss. Now is the time to be scouting alfalfa for this pest. I like to use a sweep net to simply determine if larvae have hatched in the field. Sweeping even a small patch of alfalfa with a net can reveal whether or not larvae are present. If no larvae are found, then move to the next field. However, if they are found in the net, the next step is the stem-sampling technique. This technique more accurately determines the population size and the potential for economic damage.

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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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