the paper wasps are nasty we have tasseled before. i used about 4 cans of the foam on them and they only have ever gotten me once. they BITE and sting. what ever you do if your allergic and feeling ballsy keep an epi pen and a cell phone close by and have another person there. anaphalactic reactions are a bi**hif they live in the ground no big deal, spray the living crap out of the entrance with a whole can. i would suggest a wasp and hornet spray for the best results.