(19)

(11)

EP 0 244 453 A1

(12)

(43) Date of publication: 11.11.1987 Bulletin 1987/46 (21) Application number: 86906379.0 (22) Date of filing: 21.10.1986

(51) International Patent Classification (IPC):  A01G 7/ 04( . ) A01G 9/ 14( . ) (86) International application number: PCT/GB1986/000645 (87) International publication number: WO 1987/002578 (07.05.1987 Gazette 1987/10)

(84) Designated Contracting States: AT BE CH DE FR GB IT LI LU NL SE (30) Priority: 23.10.1985 GB 19850026157 (71) Applicant: APPLIED AGRICULTURAL RESEARCH LIMITED Middlesex HA2 OLS (GB)	(72) Inventors: JOHNSON, William, Nevil, Heaton London NW3 (GB) MCKENZIE, Noel, Robertson Hanworth Middlesex TW13 7QG (GB)