Awareness and adoption level of recommended technologies of paddy under tank irrigation in Kancheepuram district of Tamil Nadu

Abstract

Spot blotch caused by Bipolaris sorokiniana (Sacc.) Shoem is one of the most important wheat leaf disease all over world; it appears in almost all wheat growing areas and causes severe yield loss every year. A field study was conducted during Rabi, 2018-19 and 2019-20 crop seasons at Main Experiment Station, ANDUA and T, Kumarganj, Ayodhya to test the resistance of 200 genotypes against Bipolaris sorokiniana under artificial epiphytotics conditions. Each genotype was sown in last week of November in single row of one meter length. Variety Raj 4015 was used as check and was sown after every 20 genotypes. Pure culture of pathogen was inoculated on genotypes by using cleaned sprayer, at evening. Disease data was recorded using double digit scale based on per cent blighted area on flag leaf and one leaf just below. Out of 200 genotypes, thirty six namely were found resistant HS652, DBW222, PBW550, PBW821, HD2967, DPW621-50, DBW88, HD3043, HD3249, HD2733, PBW781, DBW39, HD2967, K1317, HI1612, HD3293, DBW277, HW1098, WH1254, WH1270, PBW824, UP3043, UP3042, NW7062, PBW757, PBW 797, VL1015, HPW451, VL1014, PBW800, DBW246, PBW778, TL3011, DDK1052, MACS5047 and PBW780 genotypes were found resistant, 91 were moderately resistant, 43 were moderately susceptible and 30 were found susceptible against spot blotch disease of wheat.