What Chemicals Kill Earthworms?

What Chemicals Kill Earthworms? Use a carbamate insecticide to kill the earthworms. Some carbamate insecticides include carbaryl (Sevin), bendiocarb (Turcam) and propoxure (Baygon). Use about as much insecticide to kill the earthworms as you would to kill grubs, which is generally 4 to 8 lb. What spray can kill worms? Garden Safe® Brand Bt Worm