We have a ton of wasps and mud daubers on our property. They would build nests all over the house and RV. I started using a product called cypermethrin. Put it in a hose spray mixer nozzle and soaked the outside of the house and underbelly of RV. Went from knocking down 3-5 nests a week to nada. It’s been about 2 months so will wait and see how long it lasts but so far so good. Got it on Amazon for about $30 called demon max I believe.
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