Purge with Sevin Dust Sevin dust is 100 percent biodegradable, and kills approximately 100 types of insects, including boxelder bugs. Sevin dust is not poisonous to pets, plants or livestock, and can be washed off the surfaces of fruits and vegetables with plain water.Click to see full answer. Keeping this in view, how do I permanently get rid of boxelder bugs?To get rid of outdoor boxelder bugs, fill a spray bottle with water and liquid dish soap and spray the bugs to kill them. You can also sprinkle borax or food-grade diatomaceous earth around the perimeter of your home and plants to keep boxelder bugs away. what will eat box elder bugs? Rodents, including mice, rats and chipmunks, are known to eat boxelder bugs. Spiders and predacious insects may eat boxelder bugs, too. For farmers or homesteaders, chickens, ducks and guinea hens may be the answer. Additionally, what pesticide kills boxelder bugs? Pyrethrin sprays How does soapy water kill boxelder bugs?Mix about a tablespoon of dish soap into a spray bottle of water. When you find large groups of the bugs clustered together, spray them with the soapy water. If you saturate them enough, soapy water will kill several of the bugs in the group. More importantly, however, it’s also repulsive to the other bugs.