Document Type
Article
Publication Date
4-9-2007
Abstract
Degree-day information indicates that alfalfa weevil larvae should have started hatching in southern Iowa on March 30-31. In central Iowa counties, weevils should be hatching by the middle of April, and in southern Iowa, weevils should hatch the last full week of April. Proper management of this insect requires timely scouting, correct identification, determination of population levels, and if necessary, cutting the hay or spraying an insecticide. Alfalfa weevil larvae can be very destructive to first-cutting alfalfa, so fields should be scouted. Larvae remove leaf tissue, beginning with the new leaves at the top of the plant, then work down the stem to other leaves. This feeding reduces forage quality and quantity.
Copyright Owner
Iowa State University
Copyright Date
2007
Language
en
File Format
application/pdf
Recommended Citation
Rice, Marlin E. and Pope, Richard O., "Alfalfa weevil predictions for Iowa, 2007" (2007). Integrated Crop Management News. 1103.
https://lib.dr.iastate.edu/cropnews/1103
Included in
Agricultural Science Commons, Agriculture Commons, Entomology Commons, Plant Pathology Commons
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 Users are hereby notified that the content may be inaccurate, out of date, incomplete and/or may not meet the needs and requirements of the user.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/.
