A Bayer representative said: "We chose not to maintain its accreditation because of the cost of doing so. It's perfectly legal to sell, buy and use; it's just that we don't make it any more."
Neonicotinoid thiacloprid remains legal to use.
On 12 July, there is an industry summit on vine weevils at Banbury. See www.hta.org.uk/event_listing/vine-weevil-summit.html