Do you think limiting moving bees across state lines would slow spread of disease? I would think orchards would be better off if they partnered with local beekeepers instead of moving the bees so far and often. Of course having local hives would not work until they stopped bring in hives and diseases from other states. This is just an opinion but I would love to see a study on the issue. That seems like a much more likely problem than some vague pesticide.
No.
The bees in question are in effect local bees that are temporarily moved elsewhere. They do not propagate in the temporary location because the bee keepers are easily able to eliminate the swarming tendency in a temporary foreign location.
Swarming is a sexual reproductive act. Bees decide the population is great enough to permit a swarm to follow the existing queen to a new site determined by scouts and then voted on by the swarm.
The colonyleft behind raises a new queen that becomes impregnated by several drones and then proceeds to raise a new crop of bees using the ample stores left by those that left.