BT NOW BIOLOGICAL INSECTICIDE BT NOW is a water-based, biological insecticide that utilizes a novel strain of bacteria, Bacillus thuringiensis ssp. kurstaki (Btk), to offer targeted control of the caterpillars of certain moths and butterflies on a wide variety of crops. Ingestion of BT NOW paralyzes the insect's digestive system within hours, halting further crop damage potential. The affected larvae die within 2-5 days. ACTIVE INGREDIENTS Bacillus thuringiensis ssp. kurstaki strain EVB-113-19 CERTIFICATIONS OMRI Listed What is BT NOW's mode of action? The Bacillus thuringiensis ssp. kurstaki (Btk) bacteria found in BT NOW contains natural insecticidal endotoxins called "cry toxins". When consumed by the larval stage of target lepidoptera pests, these toxins bind to specific receptors in the insect's gut which immediately disrupts and paralyzes certain digestive functions. After the pest consumes Btk, plant tissue will be protected from further damage as the pest halts all feeding within hours. As the activated toxins disrupt membrane integrity in the caterpillar's midgut, Btk spores enter the body, proliferate and kill the pest 2-5 days later. Caterpillar Control in Fall Ornamentals BT NOW and Trichogramma are two naturally occurring biological organisms that specifically target lepidopotera species and when used together create an effective caterpillar management program. This combination achieves excellent control of caterpillars without harmful residue and without disrupting
