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Alfalfa Weevil Larvae Active in Southern Iowa

April 20, 2023
Accumulated growing degree days graphic.

In addition to checking alfalfa stands for winter injury, it is time to start thinking about scouting for alfalfa weevil. Despite recent warm temperatures, alfalfa weevil development is slightly behind last year. However, it is likely adults have emerged from their overwintering sites to lay eggs in alfalfa stems in southern Iowa.