***DISCLAIMER: (as if it needs to be stated) if you're allergic, or just don't want to get stung, I DON'T recommend doing what I did - I'm posting this so you can learn what NOT to do, lol. BE SMART***Ok, with that said... I called Terminix to get rid of a nasty yellow jackets nest that was hiding next to our house in some monkey grass. They wanted $150. I said "no thanks" and that I'd take care of it myself. I did an internet search and saw some "buzz" (couldn't resist) about a natural treatment of using DE on yellow jackets nests -- I figured for a fraction of the price ($13), it'd be worth a shot.I read up on methods of "dusting" the entrance at night with the the little puffer thing, and I tried that, but after a couple days, they continued about their business and seemed to mock me as I stood in the distance. So, I figured I go all in and I dumped about a pound of DE on the opening of the nest, lol, and ran inside, I kid you not. I watched from my window and now they were obviously pissed, swirling about, looking for the jerk responsible. I waited a day and still saw a few buzzing about, but it did seem like their activity had gone down. After a couple more days, things were pretty quiet so I went over to the nest and didn't see any activity, but that's probably because I also saw that my dump and run "technique" resulted in a pile of DE that literally had blocked the hole, and thought (THOUGHT) "cool, maybe it suffocated them and they're all gone" and went about my business watering some flowers that were near it. Unfortunately, the hose disturbed the DE that was covering the opening, and apparently they all weren't dead as a very angry yellow jacket was now tagging my ankle, and a few others started coming out. For me, getting stung isn't a big deal (I'm not allergic), but I was a little pissed and I may have over-reacted. I took that hose, and quickly/carefully set it so the water would start pouring down the hole (and quickly got away, needless to say). I went inside to put some baking soda on where that one little punk got me (for me, baking soda works great). I left the water on for maybe 10 minutes, then shut it off. Later in the day, I came back to find... (see attached pictures!) Woo! Success! It looked like a nuke had gone off as they were literally piled up, dead! -- ha ha ha ha ha! (evil laugh)Anyway, I can't say with 100% certainty, but I think the DE by itself MIGHT have had some affect in reducing their population, but I do know they were absolutely wiped out from the combination of water and almost a pound of DE getting flushed down the hole which definitely expedited the process - I'm wondering if maybe the DE being in the water also aided in their drowning (I have tried to use water-only/drowning method previously on a different nest, to no avail.)It's been a few days, and they are still piled up dead at the entrance, and I have seen NO signs of life, no lingering bee, nothing. So I'm going to chalk this up as a success. So for me, for $13 and a sacrificial ankle, it was WAAAY worth it vs $150 from Terminix. But I also live live on the edge, so...*****UPDATE 9/12/19: They are still ALL dead.*****(Watered my flowers in complete safety today.)