Here is a website that sells BTK and has some info about it. http://www.ghorganics.com/Thuricide%20BTK%20for%20Caterpillars.html
I am worried it is too late for my zucchini plants, especially the biggest one. We tried cutting the stem to find them but didn't find anything. I throughly sprayed...
My zucchini plants have something that is eating their stems right at the soil line. They are tunneling through. The plant overall is still producing veggies and the majority of the leaves look healthy but a few have begun to wilt. I now am noticing the same thing on my cucumber except half...