Although Sevin dust will kill wasps, these insects are an important part of the ecosystem and should be left alone if they are not bothering anyone. Wasps sometimes pose a danger to you and your family. Sevin dust is a hazardous substance and necessary precautions must be taken to avoid poisoning yourself, your children and your pets. Call your local cooperative extension office for easy, inexpensive, non-toxic ways to kill wasps. Follow proper safety protocol both to protect yourself from the wasps and the Sevin dust. Read the warnings on Sevin dust carefully.