BT NOW is a new aqueous, biological insecticide from BioSafe Systems labeled to control various lepidoptera pests in a wide variety of crops, including onions. Its formula consists of bacillus thuringiensis ssp. kurstaki (Btk) strain EVB-113-19, a new variation of the Btk bacterium that targets the lepidoptera insect while remaining easy on many beneficials and pollinators. This specialized Btk strain makes BT NOW an effective resistance management tool that is compatible with many commonly used pesticides, fertilizers and adjuvants, according to the company.
BT NOW contains insecticidal endotoxins called Cry toxins that disperse in the pest’s digestive tract. These toxins bind to the insect’s midgut receptors, immediately disrupting and paralyzing certain digestive functions. Within hours following application, the effected young lepidoptera pests will cease feeding and will die from starvation two to five days later.
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