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Appl Environ Microbiol. 1968 September; 16(9): 1309-1313
Copyright © 1968 American Society for Microbiology. All Rights Reserved.

Fungi Isolated from Tobacco Leaves and Brown-Spot Lesions Before and After Flue-Curing1

R. E. Welty, G. B. Lucas, J. T. Fletcher and H. Yang

Market Quality Research Division, U.S. Department of Agriculture, Hyattsville, Maryland 20782
Department of Plant Pathology, School of Agriculture and Life Sciences, North Carolina State University, Raleigh, North Carolina 27607

ABSTRACT

Discs of tissue excised from ripe nonflue-cured and flue-cured tobacco leaves, harvested on six dates and cultured on three selective media, yielded 21 and 24 genera of fungi, respectively. Of 5,094 fungi isolated from 3,240 pieces of nonfluecured leaf tissue, 89.5% comprised five genera, Alternaria, Cladosporium, Epicoccum, Trichoderma, and Nigrospora. Of 2,494 fungi isolated from 3,240 pieces of flue-cured leaf tissue, 70.9% were Alternaria, Cladosporium Epicoccum, Aspergillus, and Nigrospora. Flue-cured and nonflue-cured brown-spot lesions harvested at two locations yielded 12 and 14 genera of fungi, respectively. Alternaria, Penicillium, Phoma, and Stemphyllium comprised 91.5% of the 2,245 fungi isolated from noncured and 87.1% of the 1,118 fungi isolated from the cured lesions. The number and kinds of fungi obtained from diseased and healthy tissue were reduced but not eliminated by flue-curing.

FOOTNOTES

1 Paper no. 2639 of the Journal Series of the North Carolina State University Agricultural Experiment Station, Raleigh, N.C. 27607.

Appl Environ Microbiol. 1968 September; 16(9): 1309-1313
Copyright © 1968 American Society for Microbiology. All Rights Reserved.





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