>It might suggest if the corn fields are free of bees and pollinators we are
> looking at (for example) the fish left when a lake is drained?
Exactly! Hard to support a population of anything when most of the food
resource is gone. Honey bees forage over a wider range, so may be off in
better pickings somewhere, whereas the native bees that stick near home
would be near their nests along the roadsides.
Butterflies face a similar situation, since their larvae need certain
plants to grow on--if all the "weeds" are gone, there is no food for their
larvae.
Such limited appropriate forage acreage for pollinators makes them all the
more susceptible to pesticides.
--
Randy Oliver
Grass Valley, CA
www.ScientificBeekeeping.com
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