@farmerman,
Quote:much pollination takes place by ground bees and non bees(like carrion flies) etc.
I must retract one thing I wrote previously. I "have" seen two large swarms of ground bees, but didn't realize they are pollinators. In different years there were two nests of them at the base of the sassafras trees at the bottom of my backyard, about 8 feet from my neighbor's tomato plants. Guess those were what he was on about, eh? He just said 'bees' so I didn't think of those rascals.
The first time I saw the buggers was when I inadvertently ran the mower over their nest. Damned if they didn't chase me to the house, stinging me the whole way. They were inside my clothes even, and as I stripped to the buff, the blighters were swarming around the backdoor staring in at me and flipping me the bird. Had at least 40 stings.
Sassafras trees aren't anything but trouble. I have eleven of them in a row along the back; natural grown, I'm sure; can't imagine anyone wanting to plant them. The roots spread underground and send up saplings every six inches or so for 25 feet or more from the tree. During last year's drought, with no mowing to do, there were so many shoots my backyard looked like a reforestation project. Plus, there's nothing that'll dull a chainsaw quicker than sassafras. And topping it all, I haven't had a single drop of sassafras tea in the 35 years I've had the place.
Thanks for the advice about the bees. Do you plant, or have, any buckwheat about your place?
And, BTW, how much of our hive decimation is owing to killer bees from Mexico or South America? Do they remain an ongoing problem?