Ask-a-Dave's-Gardener: neem oil not working!, 1 by uglymotherpluck

uglymotherpluck wrote:
I spent a lot of $ on neem oil for the white fly invasion, to no avail! I sprayed a leaf with them on it and pulled one off a few minutes later and it was still alive, it seems like the only thing the neem oil has done is killed my plants- cucumber and tomato, kale and others. I am angry! Why hasn't anyone come up with a way to kill those suckers? I have tried vacuuming them off and put yellow cards w/ petroleum jelly on them, out, and there seems to be more every day! I am a failure at gardening. :(