Bees visit corn for pollen, period. Bees visit canola for pollen. Bees visit potatoes for pollen (Danish tests). Bees visit a lot of flowers for pollen. Bees get what the pollen is enriched with. Neonics are not good for bees.
This morning the bees flew heavily on flowering corn. I’m sure they were happy for the EU ban on treating seeds with neonics. It would have been no good for the colony with beebread made of pollen from corn grown
A lot of discussion is going on which role neonicotinoides and gmo play for die offs and ccd of bee colonies. A poison is never beneficial, neither for bees nor for man (well, many are used as plant protection). And