My understanding is that BT is organic, different manufacturers add different things to the sprays, some organic, some not, but safer brand is organic. I look at bugs like I look at powdery mildew, theyre easier to prevent than to get rid of. Neem works great for prevention but once you have something established on your plant you need to use something else. The BT will kill caterpillars and worms in a couple days and its cheap. You will keep finding them until they get all they can out of your plant.