1. Insect
  2. Vegetable Crops
  3. Vegetable Crops
  4. Hosts and Pests of Vegetable Crops

Kohlrabi-Armyworm and looper

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Beet armyworm
Spodoptera exigua Hubner
Immature female adult
© Ken Gray Insect Image Collection
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Bertha armyworm
Mamestra configurata Walker
Adult
© Ken Gray Insect Image Collection
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Cabbage looper
Trichoplusia ni Hubner
Showing damage
© Ken Gray Insect Image Collection
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Bertha armyworm
Mamestra configurata Walker
Immature
© Ken Gray Insect Image Collection
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Beet armyworm
Spodoptera exigua Hubner
Adult
© Ken Gray Insect Image Collection
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Western yellowstriped armyworm
Spodoptera praefica Grote
Young immature showing damage on leaves
© Ken Gray Insect Image Collection
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Western yellowstriped armyworm
Spodoptera praefica Grote
Egg(s) on host
© Ken Gray Insect Image Collection
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Alfalfa looper
Autographa californica Speyer
Adult
© Ken Gray Insect Image Collection
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Alfalfa looper
Autographa californica Speyer
Showing damage on leaves
© Ken Gray Insect Image Collection
Image related to Kohlrabi-Armyworm and looper
Cabbage looper
Trichoplusia ni Hubner
Adult
© Ken Gray Insect Image Collection
Image related to Kohlrabi-Armyworm and looper
Western yellowstriped armyworm
Spodoptera praefica Grote
Adult
© Ken Gray Insect Image Collection
Image related to Kohlrabi-Armyworm and looper
Alfalfa looper
Autographa californica Speyer
Egg(s) on host
© Ken Gray Insect Image Collection
Image related to Kohlrabi-Armyworm and looper
Beet armyworm
Spodoptera exigua Hubner
Egg(s) on host
© Ken Gray Insect Image Collection
Image related to Kohlrabi-Armyworm and looper
Alfalfa looper
Autographa californica Speyer
Parasitized immature
© Ken Gray Insect Image Collection
Image related to Kohlrabi-Armyworm and looper
Cabbage looper
Trichoplusia ni Hubner
Egg(s) on host
© Ken Gray Insect Image Collection
Image related to Kohlrabi-Armyworm and looper
Cabbage looper
Trichoplusia ni Hubner
Immature
© Ken Gray Insect Image Collection

Includes

Beet armyworm (Spodoptera exigua)
Bertha armyworm (Mamestra configurata)
Western yellowstriped armyworm (Spodoptera praefica)
Alfalfa looper (Autographa californica)
Cabbage looper (Trichoplusia ni)

Pest description, crop damage and life history

See:

Common Pests of Vegetable Crops

Management-chemical control: HOME USE

Apply any one of these materials to the soil surface at first sign of cutworm activity. Consult label. Minimum preharvest interval (PHI) varies with crop.

  • acetamiprid
  • azadirachtin (neem oil)-Some formulations are OMRI-listed for organic use.
  • Bacillus thuringiensis var. kurstaki (Btk)-Some formulations are OMRI-listed for organic use.
  • bifenthrin
  • carbaryl
  • cyfluthrin
  • gamma-cyhalothrin
  • horticultural oil-Some formulations are OMRI-listed for organic use.
  • kaolin-Applied as a spray to foliage and stems it acts as a repellent to some insect pests. Some formulations are OMRI-listed for organic use.
  • lambda-cyhalothrin
  • permethrin
  • plant-derived essential oils (such as rosemary and thyme oil)-Some formulations are OMRI-listed for organic use.
  • pyrethrins-Some formulations are OMRI-listed for organic use.
  • spinosad-Some formulations are OMRI-listed for organic use.
  • zeta-cypermethrin

Management-chemical control: COMMERCIAL USE

  • alpha-cypermethrin (Fastac EC) at 0.02 to 0.025 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.075 lb ai/a per season.
  • azadirachtin (Neemix) at up to 0.04 lb ai/a. PHI 0 days. REI 4 hr. Neemix is OMRI-listed for organic use.
  • Bacillus thuringiensis (Javelin) at 0.12 to 1.5 lb/a. PHI 0 days. REI 4 hr. Acts slowly; may need multiple applications. Add an appropriate spreader-sticker to enhance control. Most effective on small larvae. Some formulations are OMRI-listed for organic use.
  • beta-cyfluthrin (Baythroid XL) at 0.013 to 0.025 lb ai/a. PHI 0 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.1 lb ai/a per season.
  • beta-cyfluthrin/imidacloprid (Leverage 360) at 0.07 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.1 lb ai/a beta-cyfluthrin or 0.2 lb ai/a imidacloprid per season.
  • bifenthrin/imidacloprid (Brigadier) at 0.06 to 0.095 lb ai/a. PHI 7 days. REI 12 hr. Do not exceed 0.24 lb ai/a imidacloprid and 0.24 lb ai/a bifenthrin. Retreatment interval 7 days. Maximum 5 applications.
  • bifenthrin (Brigade WSB) at 0.033 to 0.1 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Limit 5 treatments after bloom. Do not exceed 0.5 lb ai/a per season.
  • bifenthrin (Capture LFR) at 0.04 to 0.08 lb ai/a soil applied in furrow with seed or transplant. REI 12 hr. Armyworm only. Do not exceed 0.5 lb ai/a per season including at-plant plus foliar treatments.
  • bifenthrin/zeta-cypermethrin (Hero EW) at 0.04 to 0.1 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Limit 5 treatments. Do not exceed 0.45 lb ai/a per season.
  • Burkholderia spp. (Venerate XC) at 1 to 4 quarts/a product. PHI 0 days. REI 4 hr. OMRI-listed for organic use.
  • carbaryl (Sevin 4F, Sevin 5 Bait) at 1 to 2 lb ai/a foliar or 2 lb ai/a bait. PHI 3 days. REI 12 hr. Retreatment interval 7 days. Limit 4 foliar or 3 soil treatments per year. Do not exceed 6 lb ai/a per season.
  • chlorantraniliprole (Coragen) at 0.045 to 0.098 lb ai/a a) at planting; b) via drip irrigation; c) as foliar. PHI 3 days. REI 4 hr. Retreatment interval 3 days for foliar and 10 days for chemigation. Do not exceed 0.2 lb ai/a per season.
  • chlorantraniliprole/lambda-cyhalothrin (Voliam Xpress) at 0.049 to 0.088 lb ai/a. PHI 3 days. REI 24 hr. Retreatment interval 5 days. Do not exceed 0.24 lb ai of lambda-cyhalothrin or 0.2 lb ai of chlorantraniliprole per acre per growing season.
  • chlorantraniliprole/thiamethoxam (Voliam Flexi) at 0.1 to 0.172 lb ai/a. PHI 3 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.172 lb ai of thiamethoxam or 0.2 lb ai of chlorantraniliprole per acre per growing season.
  • chlorpyrifos (Lorsban 75WG) at 0.5 to 1.0 lb ai/a. PHI 21 days. REI 24 hr. Do not exceed 3 applications per season. RESTRICTED USE IN OREGON.
  • Chromobacterium subtsugae (Grandevo) at 0.3 to 0.9 lb ai/a per 100 gal. PHI 0 days. REI 4 hr. OMRI-listed for organic use.
  • cyantraniliprole (Exirel) at 0.045 to 0.11 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 5 days. Limit 6 treatments per year. Do not exceed 0.4 lb ai/a per year.
  • cyclaniliprole (Harvanta 50SL) at 0.036 to 0.054 lb ai/a. PHI 1 day. REI 4 hr. Retreatment interval 5 days. Do not exceed 0.22 lb ai/a per year.
  • cyfluthrin (Tombstone) at 0.025 to 0.05 lb ai/a. PHI 0 days. REI 12 hr. Do not exceed 0.2 lb ai/a per season. Retreatment interval 7 days.
  • cypermethrin (Holster) at 0.075 to 0.1 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.6 lb ai/a per season.
  • emamectin benzoate (Proclaim) at 0.008 to 0.015 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.09 lb ai/a per season. Do not graze.
  • esfenvalerate (Asana XL) at 0.03 to 0.05 lb ai/a. PHI 3 days. REI 12 hr. Do not exceed 0.4 lb ai/a per year. Cabbage looper only.
  • fenpropathrin (Danitol 2.4EC) at 0.2 to 0.3 lb ai/a. PHI 7 days. REI 24 hr. Retreatment interval 7 days. Do not exceed 0.8 lb ai/a per season.
  • gamma-cyhalothrin (Declare) at 0.0075 to 0.015 lb ai/a. PHI 1 day. REI 24 hr. Do not exceed 0.12 lb ai/a per season. An oil or nonionic surfactant improves performance.
  • GS-omega/kappa-Hxtx-Hv1a (Spear Lep) at 0.8 lb ai/a. PHI 0 days. REI 4 hr. Do not exceed 2 lb ai/a per year.
  • indoxacarb (Avaunt) at 0.045 to 0.065 lb ai/a. PHI 3 days. REI 12 hr. Retreatment interval 3 days. Do not exceed 0.26 lb ai/a per season.
  • lambda-cyhalothrin (Warrior II) at 0.015 to 0.03 lb ai/a. PHI 1 day. REI 24 hr. Retreatment interval 5 days. Do not exceed 0.24 lb ai/a per season.
  • lambda-cyhalothrin/thiamethoxam (Endigo ZC) at 0.064 to 0.072 lb ai/a. PHI 1 day. REI 24 hr. Retreatment interval 7 days. Do not exceed 0.24 lb ai/a of lambda-cyhalothrin or 0.172 lb ai/a of thiamethoxam per season.
  • malathion (Malathion 8) at 1.25 lb ai/a. PHI 7 days. REI 24 hr. Retreatment interval 7 days. Limit 2 treatment per year.
  • methoxyfenozide (Intrepid 2F) at 0.06 to 0.12 lb ai/a for early-season application and 0.12 to 0.16 lb ai/a for mid to late-season application or heavy infestation. PHI 1 day. REI 4 hr. Adding adjuvant improves performance. Do not exceed 1.0 lb ai/a per season.
  • novaluron (Rimon 0.83EC) at 0.039 to 0.078 lb ai/a. PHI 7 days. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.16 lb ai/a per season.
  • spinetoram (Radiant SC) at 0.039 to 0.078 lb ai/a. PHI 1 day. REI 4 hr. Retreatment interval 4 days. Do not exceed 0.266 lb ai/a per season. Do not apply to seedling cole crops grown for transplant within a greenhouse, shade house, or field plot. Limit 6 treatments per season.
  • spinosad (Success, Entrust SC) at 0.05 to 0.16 lb ai/a. PHI 1 day. REI 4 hr. Do not exceed six applications or 0.45 lb ai/a per crop. Retreatment interval 4 days. Entrust SC is OMRI-listed for organic use.
  • tebufenozide (Confirm 2F) at 0.09 to 0.12 lb ai/a early season, or 0.12 lb ai/a mid to late season. PHI 7 days. REI 4 hr. Do not exceed 0.12 lb ai per application or 0.625 lb ai/a per season.
  • thiamethoxam/chlorantraniliprole (Durivo) at 0.195 to 0.257 lb ai/a soil. PHI 30 days. REI 12 hr. Do not exceed 0.172 lb ai/a thiamethoxam or 0.2 lb ai/a chlorantraniliprole per season.
  • zeta-cypermethrin (Mustang) at 0.04 to 0.05 lb ai/a. PHI 1 day. REI 12 hr. Retreatment interval 7 days. Do not exceed 0.3 lb ai/a per season.