Degree-day information indicates that alfalfa weevil larvae will soon begin hatching in southern Iowa. 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.
Iowa State University
Rice, Marlin E., "Alfalfa weevil hatch predicted for southern Iowa" (2005). Integrated Crop Management News. 1379.
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