Bacillus Thuringiensis (Bt): A pest control product that is made from beneficial bacteria and applied as a spray to kill caterpillars. Sold under a variety of names such as Thuricide, Dipel, and Bio-Worm and others. Use Bacillus thuringiensis ëIsraelensisí (Bti) in water for the control of mosquito larvae and for control of fungus gnats in pot plants in office buildings. Use Garrett Juice with Bt for extra effect. Molasses also helps. It provides protein and keeps insect-killing bacteria alive on the foliage longer ñ even during rain. Bt ìSan Diegoî is good for Colorado potato beetle, elm leaf beetle,.
