I’m sure the various campaigns to ban neonicotinoids waged by people like Buglife, the Friends of the Earth and the BBCT are going to carry the day in the UK. I’m confident not least because they are backed by inceasingly persuasive science and, recently, Brussels. A number of retailers have started taking neonicotinoid based products like Bayer’s Provado off the shelves. Parliament’s Environmental Audit Committee is hearing evidence about them too.
Just as I thought neonicotinoids were about to get booted into touch in the UK, the agrichemical business is fighting a spirited rearguard action to save them. I wanted to pick up one point in particular from that, which I heard repeated again on the radio this morning by a man from Syngenta.
Varroa has been a significant problem for honeybees. These are imported mites which attach themselves between the thoracic plates of honeybees and weaken the bees by sucking hemolymph. They also act as vectors for viral diseases. The European honeybee, Apis mellifera, has been defenceless against them. There are now treatments and ways of managing honeybee colonies which help the bees, and a lot of research is going on in this area.
The man from Syngenta said that bee losses were largely a consequence of varroa, not neonicotinoids. This is disingenuous. Recent research suggests the effects of neonicotinoids on honeybees are most marked when in combination with other problems, like the kind of viral diseases spread by Varroa destructor. The key point I wanted to make, though, is this. VARROA ONLY AFFECTS HONEYBEES. There is one honey bee in the UK. As I have blogged before, There are 26 Bumblebees and something over 240 species of solitary bees. Why are they declining? If it’s not varroa what is it? Some of the most persuasive recent research has looked at the impact of neonicotinoids on bumblebees. As for neonicotinoids’ effect on solitary bees (and butterflies, hoverflies, etc.), well… er… we don’t really know.
I did agree with the man from Syngenta when he said that banning neonicotinoids might not halt bee declines, and if it happens there’s a danger bees will disappear off the map of public awareness. There’s climate change, habitat loss, disease, new predators – all sorts of threats which still have to be dealt with.