Dry edible and seed pea-Cutworm, armyworm, and looper

Includes

Alfalfa looper (Autographa californica)
Cabbage looper (Trichoplusia ni)
Variegated cutworm (Peridroma saucia)
Western yellowstriped armyworm (Spodoptera praefica)

Pest description and crop damage Cutworms are usually dull gray, brown, or black, and may be striped or spotted. They often curl up when disturbed. They usually feed at night, cutting off young plants or feeding on foliage of older plants. They are a pest primarily of alfalfa and clovers but attack other legumes also. Cutworms don't often seriously damage field peas.

Management-chemical control

  • alpha-cypermethrin (Fastac EC) at 0.008 to 0.025 lb ai/a. PHI 21 days. REI 4 hr. Retreatment interval 5 days.
  • beta-cyfluthrin (Baythroid XL) at 0.007 to 0.025 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 14 days. Do not exceed 0.05 lb ai/a per season
  • Bacillus thuringiensis (Javelin) 0.12 to 1.5 lb/a. Some formulations are OMRI-listed for organic production.
  • bifenthrin/imidacloprid (Brigadier) at 0.086 lb ai/a. PHI 14 days. REI 12 hr. Do not exceed 0.13 lb ai/a imidacloprid, 0.13 lb ai/a bifenthrin. Retreatment interval 7 days.
  • carbaryl at 1 to 1.5 lb ai/a. PHI 14 days for grazing or harvest for forage, 21 days before harvest. REI 12 hr. Do not exceed 6 lb ai/a per season. Retreatment interval 7 days.
  • chlorantraniliprole/lambda-cyhalothrin (Besiege) at 0.049 to 0.098 lb ai/a. PHI 21 days. REI 24 hr. Do not exceed 0.12 lb ai/a lambda-cyhalothirn or 0.2 lb ai/a of clorantraniliprole per acre per year.
  • cyfluthrin (Tombstone) at 0.13 to 0.5 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 14 days. Do not exceed 0.1 lb ai/a per year.
  • gamma-cyhalothrin (Declare) at 0.0075 to 0.015 lb ai/a. PHI 21 days. REI 24 hr. Do not exceed 0.06 lb ai/a per season.
  • methoxyfenozide (Intrepid 2F) at 0.06 to 0.12 lb ai/a early season, 0.12 to 0.25 lb ai/a mid to late season. PHI 7 days. REI 4 hr. Retreatment interval 7 days. Do not exceed 1 lb ai/a per season.
  • spinetoram (Radiant SC) at 0.031 to 0.063 lb ai/a. PHI 28 days. REI 4 hr. Retreatment interval 4 days. Do not exceed 0.094 lb ai/a per year. Limit 6 treatments.
  • spinosad (Success, Entrust SC) at 0.0625 to 0.094 lb ai/a. PHI 28 days. REI 4 hr. Do not exceed 0.188 lb ai/a per season. Do not feed forage or hay to meat or dairy animals. Limit 6 treatments. Entrust SC is OMRI-listed for organic production.
  • zeta-cypermethrin (Mustang) at 0.05 lb ai/a soil at-plant. PHI 21 days. REI 4 hr. Do not exceed 0.3 lb ai/a per season.