Kelp.

Only problem I can see with your info/theory is that the year before "ccd" was official (06) I had a yard that upon entering it (around Christmas time) had many hives with only the queen and a few bees left in each hive. Classical ccd pre-Imidocloprid from your info.... This is not to say this stuff wasn't out there in another form before. FYI this stuff was first registered for us in the US in 1994. see http://npic.orst.edu/factsheets/imidacloprid.pdf