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Disease Note

First Report of Gibberella fujikuroi var. subglutinans in Minnesota. C. E. Windels, Department of Plant Pathology, University of Minnesota, St. Paul 55108. T. Kommedahl, Department of Plant Pathology, University of Minnesota, St. Paul 55108. Plant Dis. 67:1290. Accepted for publication 11 July 1983. Copyright 1983 American Phytopathological Society. DOI: 10.1094/PD-67-1290.

Gibberella fujikuroi var. subglutinans Edwards, the teleomorph of Fusarium moniliforme var. subglutinans Wr. & Reink., was found in Minnesota for the first time in 1982. Perithecia were not observed in nature, but perithecia 355.5 μm in diameter (220420 μm) bearing mostly one-septate, viable ascospores 16 μm long (12.518.8 μm) formed in three Fusarium colonies on homemade potato-dextrose agar (PDA) in routine isolations from cornstalks (Zea mays L.). Single-ascospore cultures produced microconidia on simple lateral phialides and polyphialides typical of F. moniliforme var. subglutinans. Transfer of perithecia from the original cultures to PDA resulted in production of perithecia and ascospores in 58 wk.