THE ANTIBIOTIC ACTION OF BACILLUS SUBTILIS IN RELATION TO CERTAIN PARASITIC FUNGI, WITH SPECIAL REFERENCE TO ALTERNARIA SOLANI (ELL. & MART.) JONES & GROUT

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Abstract
The culture filtrate of a strain of Bacillus subtilis is shown to be antagonistic to the growth of Rhizoctonia solani, R. bataticola, Alternaria solani, Botrytis cinerea, Fusarium udum, and Colletotrichum falcatum, exhibiting specificity of action. Malformation of the germ tube of Alternaria solani spores resulting in ‘bulb’ formation is also reported. Diffusion of the antibiotic principle inside host tissues is indicated.