Hop-Cutworm

Several species

Pest description and crop damage Soil-dwelling caterpillars. Their color varies, but mostly it is dark with distinct dorsal markings. Skin is smooth and glassy.

Management-chemical control

  • abamectin/bifenthriin (Athena) by ground for armyworms except beet armyworm at 0.068 to 0.11 lb ai/a. PHI 28 days. REI 12 hr. Do not make more than two applications of Athena per season. Do not make applications less than 21 days apart. Do not apply more than 0.019 lb ai/a of any abamectin formulation or 0.30 lb ai/a of any bifenthrin formulation per season. Group 6/3A insecticides.
  • azadirachtin (various formulations)-See label for rates. PHI 0 days. REI 4 hr. Works best on early larval stages. Applications can be repeated every 7 days or as needed. Some formulations are OMRI-listed for organic use.
  • bifenthrin (various formulations) at 0.06 to 0.1 lb ai/a. PHI 14 days. REI 12 hr. Do not exceed 0.1 lb ai/a per application or 0.3 lb ai/a per season. Minimum interval between applications is 21 days. Group 3A insecticide.
  • imidacloprid/bifenthrin (Brigadier, Swagger) by ground or air at 0.06 to 0.20 lb ai/a. PHI 28 days. REI 12 hr. Do not apply more than 0.1 lb ai/a of imidacloprid or more than 0.1 lb ai/a of bifenthrin per application. Do not apply more than 0.30 lb ai/a of any bifenthrin formulation or 0.30 lb ai/a of any imidacloprid formulation per season. Group 4A/3A insecticides.
  • 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.
  • spinetoram (Delegate WG) at 0.039 to 0.063 lb ai/a. PHI 1 day. REI 4 hr. Target eggs and small larvae. Allow at least 4 days between applications. Do not make more than two consecutive applications of group 5 insecticides. Do not make more than 3 applications per season. Do not apply more than 0.305 lb ai/a per season. Group 5 insecticide.
  • spinosad (Entrust, Success) at 0.06 to 0.10 lb ai/a. PHI 1 day. REI 4 hr. Allow at least five days between applications. Do not make more than two consecutive applications of group 5 insecticides. Do not make more than five applications per season. Do not apply more than 0.47 lb ai/a per season. Some formulations are OMRI-listed for organic use.. Group 5 insecticide.