Effect of Different Ph Regimes on the Growth and Micro-Sclerotial Formation on Phoma. Tropica
Abstract
Investigation on leaf spot (Phoma tropica) first time report from Indian bean (Lablab purpureus L.) under south Gujarat condition. Investigation was carried out in the Department of Plant Pathology, Navsari Agricultural University, Navsari to find out suitable pH regimes for physiological requirement of the pathogen. The fungus could grow at all the levels of pH tested, but growth and micro-sclerotial production were significantly better in acid medium as compared to alkaline, pH 6.0 appeared to be the optimum.
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Introduction
Indian bean is one of the important pulse cum vegetable crop of India. Leaf spot [Phoma tropica Schneider and Boerema] disease of Indian bean has become a major problem in recent past with a threat to successful and profitable cultivation in south Gujarat. Looking to the seriousness of the disease and economic importance of the crop in this area, present investigations were under taken to study the behaviour of the disease and to generate necessary information like to find out suitable pH regimes and which pH is useful for growth inhibition and micro-sclorotial production invitro to know the physiological requirement of pathogen
Conclusion
Results showed that the fungus could grow at all the levels of pH tested, growth and microsclerotial production were significantly superior in acidic medium as compared to alkaline, pH 6.0 appeared to be the optimum for growth and microsclerotial production.