Hop-Western spotted cucumber beetle

Diabrotica undecimpunctata

Pest description and crop damage Yellowish green, black-spotted beetles. They feed on foliage and growing tips and occasionally feed on hop cones. A pest in western Oregon and western Washington.

Management-chemical control

  • pyrethrins/azadirachtin (Azera) at 0.013 to 0.0044 lb ai/a azadirachtin/0.014 to 0.048 lb ai/a pyrethrins. PHI 0 days. REI 12 hr. Apply when pest populations first appear. Reapply every 5-7 days as needed up to 10 times per season. Do not apply more than 0.050 lb ai/a pyrethrins per season. Some formulations are OMRI-listed for organic use. Group 3A insecticide.