In reference to wasp control, there is something called wasp trap that you hang it attracts them and kills them. Also there is Wasp Freeze that will shoot up to 15feet you can order off of the internet. I am researching right now because I can't even get out of my house the wasp and mud daubers scare me so much....Nest you should be able to spray at night and it should dry up enough to knock down in a couple of days...I would spray it late at night for about 2-3 nights then on the last night knock it down...GOOD Luck!