Hop-Hop looper

Hypena humuli

Pest description and crop damage Caterpillars have two white lines along the back and a distinct whitish line on each side. The head is green and spotted with black dots. They seldom are a problem in Washington.

Management-chemical control

  • 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.
  • Bacillus thuringiensis (various formulations)-See label for rates. PHI 0 days. REI 4 hr. Works best on early larval stages. Repeat treatment as needed. Some formulations are OMRI-listed for organic use. Group 11A insecticide.
  • 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.
  • Chromobacterium subtsugae strain PRAA4-1 (Grandevo)-See label for rates. PHI 0 days. REI 4 hr. Apply when pest populations are low. Repeat as needed. Some formulations are OMRI-listed for organic use.
  • cyfluthrin (various formulations) at 0.025 lb ai/a. PHI 7 days. REI 12 hr. Do not apply more than five times per crop season. Do not apply more than 0.125 lb ai/a per season of any formulation of cyfluthrin. Allow at least 14 days between applications. Group 3A insecticide.
  • imidacloprid/bifenthrin (Brigadier, Swagger) by ground or air at 0.06 to 0.20 lb ai/a. PHI 28 days. REI 4 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.
  • imidacloprid/beta-cyfluthrin (Leverage 360) by ground or air at 0.075 lb ai/a. PHI 28 days. REI 12 hr. Do not apply more than 0.125 lb ai/a of any beta-cyfluthrin formulation, more than 0.250 lb ai/a of any beta-cyfluthrin/cyfluthrin formulation or more than 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.