(19)

(11)

EP 1 492 407 A1

(12)

(43) Date of publication: 05.01.2005 Bulletin 2005/01 (21) Application number: 02717001.8 (22) Date of filing: 26.03.2002

(51) International Patent Classification (IPC)7: A01N 63/02 (86) International application number: PCT/IB2002/001153 (87) International publication number: WO 2003/079793 (02.10.2003 Gazette 2003/40)

(84) Designated Contracting States: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE TR Designated Extension States: AL LT LV MK RO SI (71) Applicant: Council of Scientific andIndustrial Research New Delhi 110 001 (IN)	(72) Inventors: GONSALVES, Cynthia Olimpia Lydia Dona Paula,Goa 403 004 (IN) ACHUTHANKUTTY, Chittur Thelakkat Dona Paula,Goa 403 004 (IN) SUBRAYAN, Perunninakulath Parameswaran Dona Paula,Goa 403 004 (IN) NAIK, Chandrakant Govind Dona Paula,Goa 403 004 (IN) (74) Representative: Jostarndt, Hans-Dieter, Dr. Dipl.-Phys.  Brüsseler Ring 51 52074 Aachen 52074 Aachen (DE)