On the pathogenicity ofFusarium vasinfectum Atk - Self-inhibitory principle of spores as a limiting factor in Cotton wilt
A method was standardized for conducting pathogenicity ofFusarium vasinfectum Atk., on cotton, using spore suspension instead of conventional soil-oat inoculum. Spore load higher than an optimum seemed to decrease percentage wilt. The spores in high concentrations failed to germinate in glass-distilled water, soil extract and in soil. This apears to be due to some water-soluble self-inhibitory principle released by the spores. This principle might be responsible for the observed decrease in percentage wilt at the higher spore inoculum levels.