Cranberry-Cutworm

Numerous species

Pest description and crop damage There are a number of moth species with larvae (cutworms) that have a wide range of colors, markings, and patterns. The foliage-feeding larvae generally feed at night, and clip off tips of uprights and runners.

Management-cultural control

Light traps placed on or near beds can be used to reduce problematic populations of cutworms over time.

Management-chemical control: COMMERCIAL USE

  • azadirachtin (Aza-Direct, Neemix and other brands)-Consult label for rate. PHI 0 days. Some formulations are OMRI-listed for organic use.
  • Bacillus thuringiensis (Bt) (several brands)-Consult label for rate. PHI 0 days. A spreader-sticker increases efficacy. Some formulations are OMRI-listed for organic use.
  • carbaryl (Sevin and other brands) at 1.5 to 2 lb ai/a. PHI 7 days. Do not apply during bloom; hazardous to bees. Latex-based formulations such as Sevin XLR Plus are less hazardous to bees.
  • chlorpyrifos (Lorsban and other brands) at 1.41 lb ai/a. PHI 60 days. Do not apply during bloom; hazardous to bees. Do not exceed 2 applications per season. Restricted use material in the Grayland cranberry-growing area of Washington.
  • indoxacarb (Avaunt) at 0.11 lb ai/a. PHI 30 days. The effectiveness of Avaunt for controlling cutworms has not been determined, but as it controls other lepidopteran larvae, it might be effective for controlling cutworms. Hazardous to bees.
  • phosmet (Imidan) at 0.9 to 2.8 lb ai/a. PHI 14 days. Allow at least 10 days between applications. Do not exceed 10.92 lb ai/a per crop season. Do not apply during bloom; material is hazardous to bees.
  • spinetoram (Delegate) at 0.05 to 0.09 lb ai/a. PHI 21 days. Apply to small larvae; may provide some suppression. Do not apply to bloom; material is hazardous to bees for three hours following treatment.
  • spinosad (Entrust) at 0.06 to 0.09 lb ai/a. PHI 21 days. Apply to small larvae; may provide some suppression. Entrust is OMRI-listed for organic use. Do not apply to bloom; material is hazardous to bees for three hours following treatment.