Pale green turning yellow when grown, with a dark green stripe bordered by white stripes down the back. Up to 3/4 inch long.
Celery.
Eats holes in leaves and stalks. Rolls and folds leaves, ties them together with webs.
Throughout United States.
At five different locations in planting inspect 20 plants for larvae on a weekly basis. If more than 4 weeks before harvest and there are 2 or more larvae per 100 plants, treatment is warranted.
Harvest early and plow under all crop refuse afterward.
For celery, make two applications of pyrethrum dust 1 hour apart. The first application should drive tiers from their webs and the second should kill them.
Notice: Because pesticide labels can change rapidly, you should read the label directions carefully before buying and using any pesticides. Regardless of the information provided here, you should always follow the latest product label when using any pesticide. If you have any doubt, please contact your local Extension agent or pesticide dealer for the latest information on pesticide label changes.
Disclaimer: Commercial products named on this site are for informational purposes only. Virginia Cooperative Extension does not endorse these products and does not intend discrimination against other products which also may be suitable.
Foster, Rick and Brian Flood. 1995. Vegetable Insect Management, Meister Publishing Company, Willoughby, Ohio. p. 128.
Prepared by Alexandra Spring and Eric Day (Modified from a publication by the USDA)