|Researcher||Koshal, Vijay Kumar|
|Advisor||Gupta, B. R.|
|Source||KrishiKosh-Indian National Agricultural Research System|
|Educational Degree||Master of Science (M.Sc.)|
|Publisher||Sher-e-Kashmir University of Agricultural Sciences and Technology|
|Subject Domain (in DDC)||Natural sciences & mathematics ♦ Plants (Botany) ♦ Specific topics in natural history|
|Subject Keyword||Oryza Sativa L ♦ Agroclimatic ♦ Kharif ♦ Acrocylindrium Oryzae ♦ Rice Abortion ♦ Fusarium ♦ Studies On Epidemiology and Chemical Management of Sheath Rot of Rice (oryza Sativa L.) ♦ Plant Pathology|
|Abstract||Studies on sheath rot of rice (Oryza sativa L.) were conducted in rice growing sub-tropical and intermediate areas of Jammu, Kathua and Udhampur districts during 1999. Sheath rot incidence on rice was maximum in R.S.Pura zone of Jammu district (29.0%) and minimum in Nagri zone of Kathua district (3.66%). Average disease incidence of rice in Jammu, Kathua and Udhampur was 15.5, 12.38 and 11.78 per cent, respectively. Whereas, overall mean disease incidence was 13.22 per cent in sub-tropical and intermediate areas of these districts in Jammu region. Thus sheath rot of rice was considered as one of the major rice diseases in these areas. Characteristic symptoms of disease on rice were recorded during investigation. The pathogens involved in sheath rot of rice were identified as Sarocladium oryzae (Sawada) W. Gams and D. Hawksw; Fusarium moniliforme Sheldon and Curvularia lunata (wakker) Boedijn on the basis of anamorph characters. Epidemiological studies in which effect of some weather parameters (mean temperature, mean relative humidity and rainfall) on disease index was studied, revealed that disease had significant but negative correlation with respect to temperature and relative humidity whereas, a non significant correlation was observed between disease index and rainfall. Maximum disease development was observed at maximum temperature range of 32.8 Â°C and 32.5 Â°C when minimum temperature ranged between 18.11 Â°C and 20.4 Â°C. During this period minimum and maximum relative humidity ranged between 32.5 and 83.0 per cent. Also average temperature range of 25.13 Â°C to 25.45 Â°C and relative humidity of 55.64 to 57.75 per cent were found to favour rapid disease development in the month of October with disease index of 24, 63 and 183 in cultivars Bas-370, PR-106 and lET-1410, respectively. A field trial of chemical control on sheath rot of rice revealed that out of seven fungicides carbendazim (0.1%) and propiconazole (0.1%) proved efficacious giving 25.16 and 24.52 per cent disease control, respectively followed by mancozeb (0.25%) wath disease control of 20.65 per cent when sprayed thrice starting from boot leaf stage, at fifty per cent emergence of panicles and fifteen days after second spray.|
|Education Level||UG and PG|
|Learning Resource Type||Thesis|
|Size (in Bytes)||5.06 MB|
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