Is Bacillus thuringiensis a safe pesticide?

Credit: Paraflyer

Q: I just found some caterpillars in my garden, and they’re eating everything! I read online about a spray called Thuricide BT Spray. This material (containing Bacillus thuringiensis Kurstaki) is used for caterpillar infestations. Is this a safe pesticide to use? Does it harm people?

Yes, by all accounts, Bacillus thuringiensis is safe for humans. Organic-gardener Sheena Adams does a good job of explaining the usefulness of Bacillus thuringiensis here.
And you’ll find more good information here on Bacillus thuringiensis var. Kurstaki.
Good luck with your caterpillar problem!