Management of tomato mosaic virus through Allium cepa, Calotropis procera and Azadirachta indica in relation to epidemiological conditions
2015
Farooq, T.
Among the viruses prevalent on tomato, tomato mosaic virus (ToMV) is the most important, widespread and commonly occurring virus disease in tomato crop throughout Pakistan. To identify resistant source against this disease, studies were conducted on screening of the tomato lines/varieties against the tomato mosaic virus (ToMV), in relation to epidemiological factors. Ten tomato lines/varieties were collected from the Ayub Agriculture Research Institute (AARI), Faisalabad and transplanted in the research area of Department of Plant Pathology, University of Agriculture Faisalabad. The resistance/susceptibility of these lines/varieties to tomato mosaic virus was checked under field conditions. The influence of environmental factors on disease development was studied through correlation analysis. Out of ten tomato lines/varieties Naqeeb was found to be highly resistant to disease whereas a line VRI-575 was found resistant. While two varieties Riogrande and Savana were moderately resistant. One variety Baby Red, Two lines i.e., SBS-292 and GHT-2 were moderately susceptible to ToMV. One variety Nemador and one line GSL-198 was smsceptible whereas the variety Nagina was highly susceptible to tomato mosaic virus. Different plant extracts (A. cepa, C. procera and A. indica) were evaluated for their efficacy against the disease. The most effective treatment was A. indica extract at 1 % concentration. It gave a significant reduction in disease as compared to untreated control. There was significant correlation of temperature, relative humidity, rain fall and wind speed with tomato mosaic virus disease incidence.
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