Alfalfa weevils active throughout southern Iowa

April 11, 2016 1:53 PM
Blog Post

In March, I posted a blog about alfalfa weevils laying eggs in SE Iowa. Degree days have been slowly accumulating in April. I've updated the degree day map for 2016 and alfalfa weevils should be actively laying eggs throughout southern Iowa. Important temperature benchmarks are 200 degree days in southern Iowa and 250 degree days in northern Iowa.

degree days for alfalfa weevil in 2016
Current degree day accumulations for 2016 (base 48 degrees). 


Erin Hodgson Professor

Dr. Erin Hodgson started working in the Department of Entomology, now the Department of Plant Pathology, Entomology, and Microbiology, at Iowa State University in 2009. She is a professor with extension and research responsibilities in corn and soybeans. She has a general background in integrated...