alfalfa weevil larvae
Alfalfa weevils cause the most damage to alfalfa in their larval stage. Clockwise from left: second instar, fourth instar, third instar, and first instar. (Photo credit: John L. Obermeyer, Purdue Extension Entomology)
Alfalfa weevils cause the most damage to alfalfa in their larval stage. Clockwise from left: second instar, fourth instar, third instar, and first instar. (Photo credit: John L. Obermeyer, Purdue Extension Entomology)