Clover hay-Western spotted cucumber beetle

Diabrotica undecimpunctata

Pest description and crop damage Yellowish green, black-spotted beetle, common in western Oregon and Washington. Adults feed on seedlings and can kill plants and reduce stands.

Management-chemical control

  • carbaryl (Sevin 4F) at 1 lb ai/A. One application per cutting. PHI 7 days before harvest or grazing. Limit 1 treatment per cutting. REI 12 hr.