Effect of Carbon and Nitrogen Sources on Growth, Bio-Mass Production and Antifungal Metabolites by Altbrnaria Altbrnata and Cladosporiumoxysporum Sankar N. Ravi, Sreeramulu A. Applied Plant Pathology Lab, Department of Botany, Sri Venkateswara University, Tirupati - 517 502. Andhra Pradesh Abstract Nutritional studies of biocontrol agents revealed that nitrogen source was essential for the growth and sporulation. Studies on the effect of carbon sources on sporulation and growth also showed that sporulation of A. alternata was excellent on all carbon sources except pectin. A, alternata and C, oxysporum showed excellent sporulation on maltose, sucrose and fructose respectively. Potassium nitrate and casein hydrolysate were best nitrogen sources for the sporulation and bioinass production of A. alternata and C. oxysporum. The antifungal metabolites produced in culture filtrates of bioagents raised on different carbon and nitrogen sources when tested against powdery mildew pathogen of teak showed varying inhibitions. Top Keywords Alternaria alternata, Cladosporium oxysporum, carbon and nitrogen sources, culture metabolites, Uncinula tectonae. Top |
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