Developing cotton bolls were wound-inoculated with high- and low- virulence strains of Aspergillus flavus and also with A. nidulans FGSC4 and were examined at maturity for disease symptoms and fungal pectinases. All inoculated bolls showed tight-lock formation (failure of mature locks to expand and fluff out), but specific strain-related differences in intercarpellary membrane decay were observed. A highly significant correlation was found between fungal spread to adjacent locules and decay of intercarpellary membranes in bolls inoculated with A. flavus (...)
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Robert L. Brown (1992) studied this question.