If you’re growing your weed outside, then caterpillars can quickly become a pesky issue that are difficult to get rid of. However, this excellent concoction from Safer Brand, made-up of more than 98% ‘Bacillus Thuringiensis Kurstaki’ (Btk), will rapidly lead to the demise of any caterpillar infestation that has taken a fancy to your plants. It will also see off gypsy moth larvae and cabbage loopers. This is a great natural pesticide to use as it has little to no effect on species you aren’t targeting.
One of the best things about using Btk is that it is a type of bacteria that occurs naturally in soil and is environmentally safe. It is also only toxic to its target pests, so beneficial insects will be unaffected by its use. However, it has been shown to cause skin and eye irritation for some people and even worsen the effects of hay-fever for sufferers.