Potato XXII – 8

Cutworms and Loopers

Whitney S. Cranshaw
Caggage Looper 
Army Cutworm, adult.
Army Cutworm, Looper

 
Cutworms, such as variegated cutworm, and cabbage looper commonly occur on potatoes.

 

Looper problems are aggravated by some insecticides, such as Temik. Foliar feeding rarely reduces yields, but cutworm feeding on tubers can cause crop injury.

 

Product List for Cutworms and Loopers:

Insecticide

Product per Acre

Preharvest Interval , remarks

Dipel 2X, Biobit W1

Dipel 4L1, Biobit F1

Javelin WG1

0.5-2.0 lb

0.5-2 pt

0.5-1.0 lb

(0 days) Bacillus thuringiensis product. Most formulations are acceptable under current regulations for Certified Organic produce. Stomach poison activity. Labeled for application through sprinkler systems.

Ambush 25WR,1, Pounce 25WR,1

Pounce 3.2ER,1

Ambush 2ER,1

6.4-12.8 oz

 

4-8 fl oz

6.4-12.8 fl oz

(7 days) Labeled for cabbage looper and beet armyworm. Labeled for chemigation. Pyrethroid insecticide (permethrin). Extremely toxic to fish and other aquatic organisms.

Asana XLR,1

5.8-9.6 fl oz

(7 days) Proposed 24 hour reentry interval. Pyrethroid insecticide (esfenvalerate). Some rotation restrictions with root crops.

 

RRestricted Use Pesticide. 1Labelled for chemigation.

The information herein is supplied with the understanding that no discrimination is intended and that listing of commercial products, necessary to this guide, implies no endorsement by the authors or the Extension Services of Nebraska, Colorado, Wyoming or Montana. Criticism of products or equipment not listed is neither implied nor intended. Due to constantly changing labels, laws and regulations, the Extension Services can assume no liability for the suggested use of chemicals contained herein. Pesticides must be applied legally complying with all label directions and precautions on the pesticide container and any supplemental labeling and rules of state and federal pesticide regulatory agencies. State rules and regulations and special pesticide use allowances may vary from state to state: contact your State Department of Agriculture for the rules, regulations and allowances applicable in your state and locality.

 

 

Categories: Cutworms, Loopers, Potato, Insects

 

Date: 02/08/2004