(19)

(11)

EP 0 970 222 A1

(12)

(43) Date of publication: 12.01.2000 Bulletin 2000/02 (21) Application number: 98907060.2 (22) Date of filing: 25.02.1998

(51) International Patent Classification (IPC)7: C12N 15/53, A01H 1/00 (86) International application number: PCT/GB9800/597 (87) International publication number: WO 9839/454 (11.09.1998 Gazette 1998/36)

(84) Designated Contracting States: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE (30) Priority: 03.03.1997 GB 9704338 (71) Applicant: ZENECA LIMITED London W1Y 6LN (GB)	(72) Inventor: O'CONNELL, Ann, Patricia, Josephine Bracknell,Berkshire RG42 6ET (GB) (74) Representative: Huskisson, Frank Mackie et al ZENECA AgrochemicalsIntellectual Property DepartmentJealott's Hill Research StationPO Box 3538 Bracknell,Berkshire RG42 6YA Bracknell,Berkshire RG42 6YA (GB)