I think you guys have been reading this when you're high - or we're not talking about the same products. This isn't Ortho. If BT goes bad in the bottle after a year (it doesn't if you put it in the fridge) then it isn't also going to stay live in the environment in the way you suggest. And it does get the big ones also. It works because when they eat foliage with BT on it, it gets in their gut and shuts them down. That's it. They digest it and they can't eat any more. I've been using this for 10 years now. I don't broadcast it, I use it on plants that caterpillar worms attack, on the tobacco family (potatoes, tomatoes, peppers, eggplant, but usually just on the tomatoes) and I spray it on the foliage of the cannas because worms get those fairly often.

It doesn't require a mask and gloves, I'm usually wearing shorts, a t-shirt, a ballcap and sandals. I put a couple of teaspoons in the sprayer (with a gallon of water) and add some compost tea, molasses, and maybe some liquid seaweed or other fertilizer, and I do my normal foliar feeding. This is part of an accepted organic gardening program. I'm not sure where you are getting the horror stories.

SRS