One of the best and safest biological controls for the tough Colorado potato beetle. A strain of Bacillus thuringiensis that controls the larval stage of this destructive beetle. Apply when the larvae are first observed and about 1/4" long. Concentrate mixes easily with water and is very effective in controlling the pest on potatoes, tomatoes and eggplants. No chemicals! Active ingredient is a micro-organism. Very effective in controlling the beetle!