I had a nest inside my swimming pool I couldn’t physically reach. I tried traps and sprays, nothing worked. This powder doesn’t kill them instantly, it takes a few hours. So they get it on them and carry it back to their hive; and spread it to all the other hornets. A day after putting this in all four entrances to where there nest was they were all dead.
To be serious for a moment, use this:
https://www.amazon.com/Tempo-Dust-Insecticide-BA1011/dp/B004H4CC7Y/ref=mp_s_a_1_3?dchild=1&keywords=tempo+powder&qid=1594386012&sr=8-3
I had a nest inside my swimming pool I couldn’t physically reach. I tried traps and sprays, nothing worked. This powder doesn’t kill them instantly, it takes a few hours. So they get it on them and carry it back to their hive; and spread it to all the other hornets. A day after putting this in all four entrances to where there nest was they were all dead.