:smoking: Medi's got it! (Neem will work, but it doesn't last)... Bt variants are used in several products for caterpillars, grubs, etc.,...Many places that carry pond supplies will have granular bits, which hands down work best for this application,... Bonide brand is at OSH, if that helps,... If you want to speed the bacterial activation up, you can make a brew of sorts... you don't have to soak the soil deeply for this inoculation, BTW.... for 1gal water, chlorine free, I put in a fat tablespoon of molasses, and a dash of whatever nutes they're getting at the time, and about 1.5T of the granules (Bonide); mix well, and put it someplace warm, light doesn't matter either way; bubbling is good if you can,... give it a day or so for them to wake up and get busy, stirring now and again if not bubbling.... then for pots about 3gal., I pour in a pint or so of the suspension, granules included... that's it! usually, as an outdoor grower, this treatment lasts several weeks,...repeat as needed, no harm possible here,...