Interesting, Zaphir. but there's a great deal of unsupported conjecture in your argument, is there not? Any references to related research into your well defined theory? It might be better to stick to the term 'rhinitis' rather than 'vasomotor rhinitis', since the latter is non-allergenic. By the way, do bees have vasomotor neurones?

The Wiki entry on CCD:

http://en.wikipedia.org/wiki/Colony_Collapse_Disorder

It includes a discussion of genetically modified crops as a possible cause.