Lysis of mycelium ofFusarium oxysporum f. sp.udum in soil amended with organic matters |
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Authors: | Narendra Singh R. S. Singh |
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Affiliation: | (1) Present address: Department of Plant Pathology, G.B. Pant University of Agriculture and Technology, Pantnagar, Nainital, U.P., India;(2) Present address: Scientist S-1 (Plant Pathology), Indian Institute of Sugarcane Research, Lucknow 2, India |
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Abstract: | Summary Autoclaved or natural field soil amended with 0.1 to 5.0 per cent (W/W) of margosa cake, rice husk and sawdust with or without supplemental nitrogen were tested for lytic activity and bacterial numbers. Generally, non-amended autoclaved soil caused little or no lysis of mycelium ofF. oxysporum f. sp.udum; non-amended natural soil caused more lysis. Amendment of soil with margosa cake, rice husk or saw-dust with or without supplemental nitrogen greatly enhanced its lytic effect on the fungus. The degree of lysis depended on the dosage of amendment used and the stage of its decomposition in the soil. The extent of lysis increased as the bacterial population increased. Amongst bacteria,Bacillus subtilis was very common in most lytic zones. |
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Keywords: | Autoclaved soil Decomposition Fusarium oxysporum f. sp.udum Lysis Margosa cake Organic matter Rice husk Saw dust Soil Urea |
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