Re: Corn and Soy dust
Keep in mind that if bees collect this dust and bring it back to the hive, it isn't dust anymore. Unless the corn and soy dust is actually poisonous I don't see this as a source of the cause of CCD or even a contributor to CCD, except perhaps in the quality of the protein provided by corn or soy.
It could be possible though that neonicitinoid pesticide treated corn or soy beans will contribute to colony collapse were dust from corn or soy beans collected by bees and fed.
I can't sight the source, otheras know how to do that, but, studies of CCD cause have included analysis of pollen in the CCD hives. Dennis van Engelsdorp from Penn State, Jeff Petis, and Jerry Hayes from FL contributed to these studies. Maybe tracking their work would be an avenue to the studies.
Mark Berninghausen "To float, upheld, as salt water would hold you, once you dared." Denise Levertov, poet