首页|Evaluation of Spreading Pattern of Sheath Blight in Different Cultivars of Rice in Western Plain Zone of UP
Evaluation of Spreading Pattern of Sheath Blight in Different Cultivars of Rice in Western Plain Zone of UP
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NSTL
Rice is a staple food for human being all over the world and India is the second largest producer and consumer of rice at global level. Production of rice in India is limited by several biotic and abiotic stresses. Among the biotic stresses, sheath blight of rice caused by Rhizoctonia solani Kuhn [Thanetephorus cucumeris (Frank) Donk] is one of the most serious threat for rice cultivation. The present study was undertaken to determine the degree of vertical and horizontal spread of sheath blight in 10 different cultivars of rice viz., Pusa-1121, Tarawadi Basmati, Pusa Basmati-1, Pusa-2511, PB-1460, Narendra-359, Sarju-52, PD-10, PR-116 and Naveen in field experiments during 2011 and 2012 crop seasons. On the basis vertical spreading of sheath blighton different cultivars, it was observed that relative lesion height ranged between 15.9-38.0 per cent on different cultivars. Highest RLH was in PB-1 (38.09%) and lowest in Sarju-52 (15.93%). Different cultivars showed different pattern of vertical spreading. Vertical spreading of cultivar Sarju-52, Narendra-35 and PR-116 showed resistant reaction, while Pusa-2511 showed moderately resistant reaction. Remaining others cultivars viz., Pusa-1121, Tarawadi Basmati, Pusa Basmati-1, PB-1460, PD-10 and Naveen showed moderate susceptibility. In case of horizontal spreading, ranged from 1.80-8.20 per cent. Highest horizontal spreading was in PB-1(8.20%) and lowest in Naveen (1.80%). Different cultivars showed variable per cent disease incidence on the basis of horizontal spreading pattern. The cv. Narendra-35 was recorded lowest disease incidence followed by PR-116, Naveen, Pusa-2511, PD-10, Tarawadi basmati and Pusa-1121, where highest per cent disease incidence was recorded on variety Pusa Basmati-1(6.18%).
NSTL
