National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Chhattisgarh state (a part of the eastern zone) is the most congenial for rice cultivation as well as for disease development. The rice crop is known to suffer by many biotic and abiotic stresses and among biotic stresses, diseases are pivotal one. In the present study, epidemiological aspect of sheath blight disease of rice carried out. Sheath blight disease progression and apparent infection rate (r) were maximum during observation period from 1-15 and 16-30 October in over the four years kharif season. During this period of time, crop growth stage of test variety ‘Swarna’ was in maximum tillering to panicle initiation stage coincide with the Tmax range (30.5-32.6oC) and SSH range (4.2-9.6) which favours the maximum apparent rate of infection by Rhizoctonia solani and resulted in maximum sheath blight disease progression. In all the maximum value of AUDPC calculated in first date of sowing followed by second date of sowing and least in third date of sowing during kharif 2013, 2015 and 2016. In kharif 2014, it was maximum in first date of sowing followed by third date of sowing and least in second date of sowing. Year wise correlation analysis between weather parameters and sheath blight disease severity suggest that Tmax and SSH had positive effect in the development of sheath blight disease of rice during kharif season.
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