Bt or Bacillus thuringiensis is supposed to kill all kinds of caterpillars (I think that's what the little yellow wormy things are), but is it safe to use on pot plants?
dutch.lover Reviewed by dutch.lover on . yellow wormy things won't go away! Ok so here's the deal- Harris7 and I have got these teeny yellow wormy things on our plants. They won't go away. They are so small you can barely see them, but they are eating our plants badly. We use insecticidal soap on all the plants whenever we spot one, and then we spray all the plants with a diluted neem oil mix every few days. I sprayed a bug with the soap once, waited an hour- and the wormy thing was still there, looking pretty dead to me (wasn't moving). It seems to me that the Rating: 5