B.T. Worm Killer contains Bacillus Thuringiensis (12.0%) a eliminating bacterial organism which causes disease in certain insects, thereby controlling them. An insect that eats B.T. will stop feeding immediately. They will then die one to five days later due to disintegration of the digestive tract and the resulting starvation. Best results are obtained when the product is applied early in the day. It remains effective for several weeks following application, and it will not harm beneficial insects. To apply, mix one and a half to three fluid ounces per gallon of water. Thorough coverage of foliage is necessary for optimal performance. Active ingredients: a blend of CrylA and CrylC derived delta endotoxins of Bacillus thuringiensis encapsulated in killed Pseudomonas fluorescens..12%