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 |
Sunflower is an important major oilseed crop ranks next to groundnut and soybean at global level. It belongs to the family Asteraceae and mostly infected by several fungal, bacterial and viral diseases among which leaf spot and blight caused by Alternaria helianthi was considered as one of the most destructive diseases in the sunflower growing areas. An experiment was studied to determine the disease incidence and intensity of the disease in both Kharif and Rabi season (2018-19) by observing the plant raised in field. Attempt was made to evaluate the effect of different range of pH and temperature on growth of the fungus and calculated under field condition in both Kharif and Rabi season. The results obtained from the present investigation indicate that the incidence of the disease and its intensity was found more during Rabi season than in Kharif under field condition which may be attributed to suitable environment and favourable soil conditions. Maximum dry weight growth of the fungus was observed at pH 6.0 followed by pH 5.0 and temperature at 300C-350C. The above parameters should be considered while growing sunflower in field condition along with other protection measures to grow disease free sunflower crop with maximum yield and good quality seed.
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