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Acharya Narendra Deva University of Agriculture & Technology, Ayodhya

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20201
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Subject: Plant Pathology × Author: Dibya, Dibya ×
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    ThesisItemOpen Access
    Studies on incidence, severity, variability, bio-chemical basis of resistance and management of spot blotch of wheat
    (ANDUAT, Kumarganj, Ayodhya, 2020-10-27) Dibya, Dibya; Singh, S.P.ANDUAT
    The present investigation entitled “Studies on incidence, severity, variability and bio-chemical basis of resistance and management of spot blotch of wheat” was carried out at Student Instructional Farm (SIF), Main Experimental Station (MES), Wheat Pathological Laboratory, Department of Plant Pathology and Department of Agriculture Bio-chemistry at Acharya Narendra Deva University of Agriculture and Technology, Kumarganj, Ayodhya. This University is located in the Indo-Gangetic Plains (IGPs) of Eastern Uttar Pradesh at latitude 26.47o N, longitude 82.12o and at altitude of 113 meter above the sea level. The experiments were conducted during Rabi season 2018-2019 and 2019-20. Wheat (Triticum aestivum L.) is the most important cereal food crop of the world as well as the second most important cereal food crop in India, which contributes nearly one-third of the total food grains production. . India recorded all time high 101.20 mt of wheat production from an area of 29.55 mha with an average national productivity 3424 kg/ha during 2018 (Anonymous, 2018-19). Out of 200 genotypes/lines, none of the genotypes/lines were found immune and highly susceptible, thirty six genotypes were found resistance, ninety one genotypes were found moderately resistant and forty three genotypes were found moderately susceptible. The AUDPC calculated for 200 wheat genotypes on the basis of plant disease intensity varied from 52.5 to 1057.0 first year and 101.5 to 976.5 second year showing the fast progress of disease in all genotypes. Survey of ten districts of eastern Uttar Pradesh during Rabi season 2018-2019 and 2019-20 was carried out in first and third week of March to assess the incidence and severity of foliar blight especially, spot blotch caused by B. sorokiniana. Highest incidence of foliar blight was recorded in district Ayodhya (78.41 per cent) and lowest incidence was recorded with district Maharajganj (69.65 per cent). The severity were ranged 12 to 89 it was observed that during 2019-20 foliar blight severity was more than year 2018-2019.