Posted: 22/04/2013 at 13:25
You are right Verdun. I should have read the post more carefully. Bayer make a pesticide called Provado Ultimate Bug Killer, which has the same active ingredient as Provado Vine Weevil Killer, i.e. thiacloprid., in the same concentration, 9 grams per litre. they sell at around the same price, around £8 for 400ml.
Their Vine Weevil Killer used to use a very similar ingredient, imidacloprid, but the formula changed (they now call it vine Weevil Killer 2! I think it was in response to concerns about imidacloprid and bees. Imidacloprid is still used in their Lawn Grub Killer, and the thiacloprid products can be used instead, provided you do the maths and get the concentration right. There is a BIG saving.