We have our garden sprayed by pest control nothing seems to stop them.. While it could do away with the pests annoying you, it will harm the useful insects, earthworms, and so forth. as nicely. It will keep within the ground the place you sprinkle it – it doesn’t dissolve and disappear anymore than damaged glass would. To deter cabbage loopers from eating the leaves of cabbage, Brussels sprouts, or kale, add three teaspoons cayenne pepper to 1 quart of water. Place in a spray bottle and apply to leaves, stems, and the ground directly surrounding every plant. Like bats and snakes, spiders are unfairly typecast as scary.