You cannot have a serious allergic reaction with your first sting. They don't hurt as badly as many people think. They can come in through a door, just like flies or mosquitos. I do understand, though. I really hate spiders. Spider bites are worse than wasp stings, imo. I'm the designated baseball bat wasp nest slugger in our family. My dh is phobic of them, too.
They are attracted to meat and sweets. I'd put a little bit a cooked meat in some sticky honey or syrup.
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My German Shepherd eats wasps. Catches them in the air. Wish I could loan him to you!
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Any kind of spray will temporarily disable it from flying, too. Whatever you have handy. Arm yourself!