For those not aware, there are 2 different kinds(actually more) of BT that are used as an organic garden larvacide/caterpillar killer.
The one for fungus gnat larvae and mosquito larva is Bacillus Thuringiensis Israeliensis, found in Gnatrol, Mosquito bits, and Mosquito dunks.
The one found in Thurcide and Dipel is Bacillus Thuringiensis Kurstaki, this is used to organically control hornworms, fruitworms, and other caterpillars.
They are not used interchangeably.
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