Mar. 25,1914 
Imperfect Fungi from Wheat, Oats, and Barley 
487 
while other forms apparently are nonparasitic. Helminthosporium 
gramineum and Fusarium culmorum were found to be parasitic, while 
Cladosporium gramineum and an undetermined species of Altenaria were 
not parasitic under the conditions here described. That only certain 
species are pathogenic is to be expected. Their identity as well as that 
of the large number of forms apparently saprophytic on cereals is more 
or less confused in the literature but should be determined, and the 
extent to which these fungi affect cereals should be ascertanied by 
laboratory and greenhouse studies. These need to be reinforced by pure 
culture inoculations of seeds, seedlings, plants in various stages of 
growth, and soil under field conditions before the exact relation of such 
fungi to cereal cropping can be definitely established. 
LITERATURE CITED 
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Anst. Land- u. Forstw., Heft 4, p. 32-33. 
In Mitt. K. Biol. 
2. - 
1908. tiber die Schadigung von Getreide dnrch Fusarien. In Mitt. K. Biol. 
Anst. Land- u. Forstw., Heft 6, p. 10-11. 
3 - - 
1909. Einige Kranklieiten und Schadigungen des Wintergetreides. In Illus. 
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4. Beckwith, T. D. * 
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5 - - 
1911. Root and culm infection of wheat by soil fungi in North Dakota. In 
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6. BollEy, H. L. 
1909. Deterioration in wheat yields due to root rots and blight producing dis¬ 
eases. N. Dak. Agr. Expt. Sta. Press Bui. 33, 4 p. 
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methods after soil sterilization. In Science, n. s., v. 33, no. 841, p. 229-232. 
8 . - 
1911b. The work of imperfect fungi in cereal crop deterioration. Abstract. In 
Science, n. s., v. 33, no. 842, p. 259-260. 
9 - - 
1912. [Report on the work of the] Department of Botany and Plant Pathology. 
N. Dak. Agr. Expt. Sta. 22d Ann. Rpt., 1911/12, p. 23-60. 
10. Chester, F. D. 
1891. The scab of the wheat. Del. Agr. Expt. Sta. 3d Ann. Rpt., 1890, p. 89-90, 
fig. 14-15. 
11. Detmers, Freda. 
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12. Eidam, E. 
1891. Das Vorkommen der Fleckenkrankheit auf Gersten- und auf Haferblattem. 
In Der Landwirt, Bd. 27, p. 509. Original not seen. 
13. Frank, A. B. 
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