Dacthal weed control revoked Growers are being warned that residual herbicide Dacthal W75 (chlorthal-dimethyl), for pre-emergence weed control, will be revoked on 23 March 2010 following its non-inclusion in Annex I of Council Directive 91/414/EEC. Sign in to continue Sign in Email address Password Stay signed in Trouble signing in? Reset password: Click here Email: hwsupport@haymarket.com Call: 020 8267 8121 Register FREE 14 days limited access to subscriber-only content Register Subscribe From £299/pa Full access to horticultureweek.com Monthly print issue for 12 months Keep track of competitors, market trends, and policy changes with sector specific email bulletins Live email alerts from the pest and disease tracker New project leads and business prospects every week through the landscape leads service Bespoke multi-user packages available Choose a Package