Prof. Dave Goulson of Sussex University gives a response to the Society of Chemical Industry meeting in London to discuss “Are neonicotinoids killing bees?”

He gives a summary of what is know of the effect of neonicotinoid pesticides on bees,
particularly on bumblebees and other wild bees that are important pollinators of crops and
wildflowers.  In the UK, honeybees contribute no more than ~30% of crop pollination, the rest coming from wild insects.

http://splash.sussex.ac.uk/blog/for/dg229/2016/10/14/will-the-uk-retain-the-neonicotinoid-moratorium-postbrexit