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Disease Note. Occurrence and Pathogenicity of Fusarium proliferatum on Corn in Minnesota. Thor Kommedahl, Department of Plant Pathology, University of Minnesota, St. Paul 55108. K. K. Sabet, P. M. Burnes, and C. E. Windels. Department of Plant Pathology, University of Minnesota, St. Paul 55108. Plant Dis. 71:281. Accepted for publication 9 December 1986. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/PD-71-0281B. Fusarium proliferatum (Matsushima) Nirenberg, recently separated
from F. moniliforme Sheldon (I) and of unknown pathogenicity, was
isolated from 5% of 1,000 mature cornstalks in northwest Minnesota in
1985 (2) and made up 3% of 2,800 Fusarium colonies from roots of
mature corn (Zea mays L.) in Waseca (southern Minnesota) in 1986.
Among 28 isolates of F. proliferatum grown on toothpicks used to
inoculate corn at St. Paul (10 plants per isolate) in 1986, the average
infection rating on a scale of 1-4 was 2.8, compared with 3.5 for five
isolates of F. graminearum Schwabe. F. proliferatum in a
cornmeal:sand medium mixed with autoclaved soil and planted to corn
in the greenhouse (24 C) resulted in rotted kernels at 50% inoculum
(v/v) and in seedlings (four-leaf stage) that were one-third as tall as
controls and less developed, discolored roots at 10% inoculum (v/v).
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