1Department of Plant Pathology, University of Agricultural Sciences, Raichur, Karnataka
2Department of Plant Pathology, University of Agricultural Sciences, Bangalore, Karnataka. manjunathkrishi@gmail.com
The present investigation was carried out to evaluate the sunflower genotypes for slow rusting mechanism. Nine genotypes viz., DSH 1, GK 2002, Kaveri 618, KBSH 1, Morden, NSH 160, PAC 36 and PAC 304 were included for evaluation. The genotypes PAC 36, PAC 304 and GK 2002 were identified as slow rusters. Minimum per cent disease index and less area under disease progress curve (AUDPC) were exhibited by these genotypes. The slow rust components viz., uredia per square centimetre, uredial size and number of uredospores per uredia were less in PAC 36, PAC 304 and GK 2002. Morden, NSH 160 and Kaveri 618 were identified as fast rusters, they showed maximum per cent disease index and higher AUDPC value and other components of slow rusting.
Sunflower genotypes, slow rusting, uredospores, disease index
