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Appl Environ Microbiol. 1971 October; 22(4): 732-733
Copyright © 1971 American Society for Microbiology. All Rights Reserved.

Lack of Toxicity of Helminthosporium maydis-Invaded Corn and Culture Filtrates to Chicks and Mice ¹

University of Georgia Coastal Plain Experiment Station, Tifton, Georgia 31794
Diagnostic and Research Laboratories, University of Georgia College of Veterinary Medicine, Tifton, Georgia 31794

ABSTRACT

Six isolates of Helminthosporium maydis, obtained from southern leaf blight-damaged corn, were grown separately on autoclaved corn and fed to chicks and mice to evaluate their toxigenicity. Two-, three-, and four-week-old culture filtrates from three pathogenic isolates grown separately on modified Fries medium were also evaluated for toxigenicity. None of the invaded corn samples or culture filtrates affected the weights of chicks or mice when compared to controls. Postmortem examinations did not reveal significant gross lesions. H. maydis was not toxigenic under our experimental conditions.

¹ Published as journal series paper no. 1004 and Institute of Comparative Medicine manuscript 850.