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V. VISALAKSHMI*, K. MADHU KUMAR, A. UPENDRA RAO AND N. HARI SATYANARAYANA
Agricultural Research Station, Amadalavalasa, Srikakulam, Andhra Pradesh
Thirty six early duration rice varieties were evaluated during kharif, 2015 under natural field conditions for resistance to stem borer and their yield potential in late sown situation. The highest incidence of stem borer as per cent white ears was recorded in TN1 (19.48%) which was the susceptible check, whereas, two varieties were found to be highly resistant with 0 scale (incidence less than 1.0% WE), twenty five varieties, were found to be Resistant with scale ‘1’ (incidence ranged between 1.0-5.0% WE) and eight varieties were moderately resistant with scale’3’ (incidence ranged between 6.0-10.0% WE). A significant positive correlation was observed between no. of panicles and grain yield (r= 0.39). As per the study, NLR40024 was the most suitable variety for North Coastal Zone of Andhra Pradesh with 6164 kg ha-1 grain yield along with high resistance to stem borer at reproductive stage under late sown conditions on puddled soil.
Rice, Early duration, Yellow stem borer, white ears