(19)

(11)

EP 0 227 687 A1

(12)

(43) Date of publication: 08.07.1987 Bulletin 1987/28 (21) Application number: 85905736.0 (22) Date of filing: 15.11.1985

(51) International Patent Classification (IPC):  A01N 59/ 00( . ) (86) International application number: PCT/AU1985/000283 (87) International publication number: WO 1986/002807 (22.05.1986 Gazette 1986/11)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 16.11.1984 AU 19840008157 (71) Applicants: DRYACIDE PTY. LTD. Melbourne, VIC 3000 (AU) AGNEW CLOUGH LIMITED Perth, W.A. 6000 (AU)	(72) Inventor: HEDGES, Kenneth, Blake Attadale, W.A. 6156 (AU) (74) Representative: Carpmael, John William Maurice, et al  CARPMAELS & RANSFORD 43 Bloomsbury Square London, WC1A 2RA London, WC1A 2RA (GB)