Dipel DF is a water-dispersible, granular biological insecticide used for the control of caterpillars that infest box hedging (Buxus). Dipel contains Bacillus thuringiensis (Bt), a naturally occurring microbe that produces toxins to which these specific caterpillars are susceptible, stopping their feeding and eventually killing them once ingested, typically within 24-72 hours.

It can also be used to control caterpillars in vegetables, soft fruit, ornamentals and other amenity vegetation and is also effective on Brown Tail Moths.