Pest description and crop damage This is the largest weevil found in legume fields. The full-grown larva is about 0.5 inch long and has a brown head. The body is green or yellowish green shading to pink at the tip of the abdomen, with a white or pinkish line down the center of the back. Larvae feed on buds and leaves.
During cool, moist spring weather, a fungal disease usually attacks larvae, naturally controlling them.
- malathion (Drexel Malathion 5EC) at 0.94 to 1.25 lb ai/a. PHI 0 days. Limit 2 treatments per cutting. Retreatment interval 14 days. REI 12 hr. Do not apply more than 2.5 lb ai per acre per calendar year.