Hop-Corn earworm

Helicoverpa zea

Pest description and crop damage Caterpillars vary from green to brown or reddish, with a few fine hairs or spines on the body.

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.
  • 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.