I had read that a solution of liquid soap in water could be used for wasps. If this is correct it would be better for all than some other sprays, but ONLY if it works. Anyone else ever try it?
That would be a hornet's nest...A few years ago,I noticed a football sized nest of wasps under a bay window in our parlor outside,and Iwaited till it got dark out,and it was a chilly night,it dropped into the 50's..I searched all over the house for something to spray them with,but were fresh out of wasp spray,and I had no carb or brake cleaner..
But I DID have a brand new can of that "Great Stuff" expanding foam!..so I used that,I shoved the nozzle into the nests hole,and let her rip!..the nest started vibrating like 1000 wasps were trying to fly away at once,then about 10 seconds later--silence!...the next morning I went out to look,the nest was about twice as big as it was before,and hard as a brick!..I scraped it off with a putty knife in one peice,and placed it in my metal wheelbarrow,and just to be safe,I doused it with some gas and tossed a match at it!..took 1/2 an hour for it to burn completely..
About 2 weeks later ,I saw another nest identical to that one they built,wrapped around two 150W floodlights ,way up on the eaves of the house!..so some escaped I guess,or their relatives moved in after the funeral!..I was able to soak that nest by hanging out of a bedroom window at 1 am the following night..couldn't reach it good enough to remove it all,some is still there ,and that was 5+ years ago!..that paper mache' must be pretty rugged stuff!..