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. PHI 7 days before harvest or grazing. Use only once per cutting. REI 12 hr. Do not use carbaryl when clover is blooming or when bees are foraging actively. Carbaryl may burn foliage under wet or hot conditions.