Abstract
Twenty carbon sources were tested for their ability to induce or inhibit the agglutination of macroconidia of Fusarium solani f. sp. phaseoli in hydroponic nutrient solution. Carbon sources were added individually to fresh nutrient solution or to a root homogenate from Vigna radiata. An unknown factor present in the root homogenate, and believed to be of plant origin, consistently induced the agglutination of macroconidia within 20 min at 25 C and pH 5.5. Twenty carbon sources did not induce spore agglutination when tested at 50-mM concentrations in fresh nutrient solution, and they did not inhibit spore agglutination when tested at 50- or 100-mM concentrations in root homogenate [...]
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