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so, what exactly IS BT insecticide?

Sure, BT is something having to do with Bacillus thuringiensis, which is a is a gram-positive, soil-dwelling bacterium. But what EXACTLY is the stuff you spray on veggies (e.g. Thuricide)? Is it live BT bacteria? Is it dead BT bacteria? Or is it just the Cyt proteins that the BT bacteria produce, which is the toxin that actually kills caterpillars? Would love to see an informative writeup on this. No, please, Wikipedia talks about the bacteria itself, which is not necessarily what you spray on veggies. How is the fluid that you spray on plants actually produced? The EPA filing on Thuricide says that it is "Bacillus thuringiensis subspecies kurstaki solids, spores and Lepidopteran active toxins." So you get the toxins along with the bacterial solids and spores? Sounds like dead bacteria, along with their products. Can anyone elaborate? How long does it take for the bacteria, when you grow it, to actually make the toxins?

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