Go out at night with a torch to spot the beetles feeding. Kills whiteflies, blackflies, scale insects and mealy bugs. Drench the soil close to the plant stem with an insecticide such as Bio Provado Vine Weevil Killer 2 or Bug Clear Ultra Vine Weevil Killer. Baby vine weevils grow from little eggs laid in the plant’s roots - which are very difficult to see. EUH401 To avoid risks to human health and the environment, comply with the instructions for use. PROVADO VINE WEEVIL KILLER 2 2/10 Version 5 / GB Revision Date: 04.10.2013 102000009019 Print Date: 07.01.2014 Signal word: Warning Hazard statements H410 Very toxic to aquatic life with long lasting effects. I treat the troughs with Provado vine weevil killer because Provado lasts quite a few months so any weevils lured there to lay their eggs don't have a cat in hell's chance. Nemasys is a type of Nematode sold as a Vine Weevil Killer. This product works in roots and in the soil to protect the whole plant for 2 months. This is normally applied as a drench to the soil. Control. The only effective 'spray' that we have been happy with is Provado Vine Weevil Killer 2 (Bayer) which contains Thiacloprid - which seems to be the only effective chemical at time of writing (Dec 2010). The Garden Shop Offer Tips, Products & Advice on How to Control Vine Weevil These are not to be used on edible crops. Precautionary statements Treatment for Vine Weevil. BugClear Ultra Vine Weevil Killer is a systemic and contact insecticide for the control of Vine Weevil in pots and hanging baskets. Vine Weevil Can Attack Your Flowers & Shrubs. Try Nemasys Vine Weevil Killer. Provado Vine Weevil Killer is s a chemical formula by Bayer. They hatch into 10mm long ‘C’ shaped grubs with cream coloured bodies and brown heads. Dilute and water affected areas and plants.