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Effect of Temperature and pH on growth of Alternaria alternata, leaf spot pathogen of soyabean

Gawai Du, Mangnalikar Ss
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Soyabean is widely cultivated oil seed crop in Marathwada and rest of Maharashtra region. The leaf spot of soyabean is caused by Alternaria alternata is becoming a common disease onsoyabean crop. The fungal pathogen are greatly influenced by environmental factor therefore the present work undertaken to study the effect of temperature and pH on growth of Alternaria alternata. The effect of temperature and pH were determined by colony diameter method by using Martins rose Bengal streptomycin agar
more » ... medium. It is clearly evident from the result that all the temperature pH tested showed variation in the diameter of colony. The temperature 35 0 C encouraged better growth of Alternaria alternata as compared to 30 0 C and 40 0 C. The result also revealed that pH 6.5 encouraged better growth of Alternaria alternata to the pH 7.5 and 5.5. It is concluded from the result that temperature 35 0 C and pH 6.5 is optimum temperature and pH for the growth Alternaria alternata.
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Citation

Gawai Du, Mangnalikar Ss. "Effect of Temperature and pH on growth of Alternaria alternata, leaf spot pathogen of soyabean."