Also referred to as the Parsleyworm or Carrot Caterpillar.
Green with yellow and white spotted black band; up to 2 inches long. Two orange "horns" just behind the head are projected when the caterpillar is disturbed. This caterpillar is the larva of the black swallowtail butterfly.
Carrot, celery, parsley, dill, and parsnip.
Chews leaves and stems, destroys tops. Seldom numerous enough to reduce yield.
Throughout United States.
Hand-picking these caterpillars is usually sufficient.
Bacillus thuringiensis , or Bt, (Bactur, Dipel, SOK BT, Thuricide) 2.0 to 3.0 tbsp in 1 gallon water. Bacillus thuringiensis is safe and will work, but its results are not quickly observable. It is not necessary to wait before harvesting after an application of Bt.
Treat with a registered insecticide if cultural control fails.
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.
Prepared by Alexandra Spring and Eric Day (Modified from a publication by the USDA)