I use a product sold in the UK as Dithane 945. I believe the active ingredient is carbendazim, but I don't have any left to check. General practice is to soak the chips in this for 20-30 minutes: seems to do the trick! John Grimshaw Dr John M. Grimshaw Garden Manager, Colesbourne Gardens Sycamore Cottage Colesbourne Nr Cheltenham Gloucestershire GL53 9NP Website: http://www.colesbournegardens.org.uk/