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Sporulation Of Helminthosporium Dictyoides On Filter Paper, G. A. Bean, Roy D. Wilcoxson
Sporulation Of Helminthosporium Dictyoides On Filter Paper, G. A. Bean, Roy D. Wilcoxson
Journal of the Minnesota Academy of Science
Helminthosporium dictyoides Drechs. and H. sativum Pam. King and Bakke were the fungi most commonly isolated from plants of Poa pratensis L. infected with leaf spot in Minnesota during 1960-1962. H. dictyoides has not been implicated as a pathogen of P. pratensis (it is pathogenic on Festuca spp.) and so studies on its physiology and pathogenicity seemed necessary. Such work usually requires a large quantity of spores but H. dictyoides sporulated sparingly on the acid potato - dextrose agar used for isolating it from the plant tissue. We decided to study methods for inducing abundant sporulation as preliminary work for …
The Influence Of Soil On Germination Of Fungus Spores, Roy D. Wilcoxson
The Influence Of Soil On Germination Of Fungus Spores, Roy D. Wilcoxson
Journal of the Minnesota Academy of Science
Soil prevents spores of many fungi from germinating, according to reports from different parts of the world. Thus Welsh soils were reported to be fungistatic to several fungi (Dobbs, 1953). Jackson (1958) made a similar report about Nigerian soils. In Minnesota Fusarium oxysporium f. lini (Bolley) Sny. and Han. persists in soil devoid of host debris but Helminthosporium sativum P.K.B. does not (Anwar, 1949). A more thorough study of the influence of Minnesota soils on germination of fungus spores would provide additional information on ecology of fungi and might suggest control measures for certain pathogens. Such a study may be …