IOWA ACADEMY OK SCIENCES. 93 



SOME FUNGUS DISEASES OF IOWA FORAGE PLANTS.* 



BV L. II. PAMMEL. 



The subject was treated imder the following heads: Rust, smut, mildews, 

 spot diseases and bacterial diseases. The synonoray is that given by 

 Saccardo, "Sylioge Fungorum." The locality is Ames, and species were 

 mostly observed by myself. 



ScHizoMYCETACE.E. Bacteria Bacillus Sorghi, W. A. Kellerman, S. vul- 

 gar e. 



Peronosporace.e. Downy Mildews. Peronospora trifoliorum on Astra- 

 galus canadensis. (Halsted.) Vicia Americana. 



P. graminicola on Setaria viridis, S. italica. It often produces distortions of 

 parts of the flower and is especially destructive to young Fox-tail. 



Erysiphe.e. Powdeiy Mildews. Erysiphe graminis on Poa pratensis, 

 P. arachnifei'a, P. serotina, Eatonia obtusata, Agrostis alba var. vulgaris, 

 Triticum vulgare. 



Hypocreace^. Ergot or Calaviceps purpurea, T\\\.^ on Secale cereale, 

 Elymus virginicus, E. striatus, (Halsted), Asprella hystrix, Agropyrum 

 glaucum, A. repens. Calamagrostis canadensis, (ilyceria fluitans (Halsted), 

 Spartina cynosuroides (Halsted). 



D0THIDEOE.E. Phyllachora graminis, (Pers.) Fuckel on Agropyrum 

 repens, Elymus Canadensis, Asprella hystrix, Panicum dichotomum. 



P. trifolii (Pers.). Fuckel. 



PiiACiDiACE.'E. Phacidimn medicagiuis, on Medicago sativa. 



Hyphomycetes. Scolecotrichum graminis on Dactylis glomerata. 



Eelraithosporium graminis on Hordeum vulgare. 



Cladosparium graminis on Avena sativa. 



Uredine-k. Rusts. Uromyces Irifolii, (Alb. and Schw.) Wint. on Tri- 

 folium pratense. T. incarnatum (F. A. Sirrine). 



U. graminicola, Burrill on Panicum virgatum. 



Puccinia andropogonis, Schw. on Andropogon provincialis, A. scoparius, 

 Chrysopogon nutans. 



P. emaculata, Schw. on Panicum capillare. 



P. graminis, Pers. on Agrostis alba var. vulgaris. Agropyrum glaucun. A. 

 repens, Triticum vulgare. Hordeum vulgare. 



*The entire paper, but adapted to general readers, was published in full in Monthly 

 Keview of the Iowa Weather and Crop Service. Vol. I., No. 5, p. 2; No. 6, p. 1; No. 7. p. 

 4; No. 9, p. 5. Vol. II.. No. 1, p. 2; No. 2, p. 8; No. 3, p. 8; also separate 33 pp. 



