A SOIL SUSPENSION - PLATING METHOD OF ESTIMATING POPULATIONS OF FUSARIUM OXYSPORUM F. MELONIS IN MUSKMELON WILT SOILS

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Abstract
A soil suspension – plating method, applicable to the estimation of populations of Fusarium oxysporum and the muskmelon wilt pathogen, F. oxysporum f. melonis, in wilt-infested soils has been evaluated. By this method populations of F. oxysporum f. melonis varying from 20 to 1000 propagules per gram of soil have been obtained. The problem of identifying the muskmelon wilt fungus among morphologically similar formae of F. oxysporum is dealt with.