We have about 100 (yes, 100) nest in our backyard full of ground bees. The hole is the size of a pencil. They are very small, black and yellow, fuzzy, and docile. I am guessing they are...miner bees? And debating leaving them alone b/c I am guessing they'll go away after a while. One Home Depot staffer suggested Sevin dust, another spray. Thoughts? So much for fertilizing the lawn this weekend.