North of where I grew up, towards Carrot River, Saskatchewan, there are big leafcutter areas. They pollinate alfalfa tremendously and there have been numerous attempts to use them to pollinate wild blueberries. It doesn't work.
They are very easily affected by wind. If you have a nest, they will fly within 500 feet of that nest. On the east coast, we get some very strong winds. I thought we got strong winds in western Canada, but no; we get them in Atlantic Canada, and they'll just blow the insects off to the edge of the field.