102 BULLETIN 1366, U. S, DEPARTMENT OF AGRICULTURE 



TRIFOLIUM— Continued. 



T. pratense, red clover, etc. — Continued. 



Sclerotinia trifoliorum Eriks., root-rot. Pa., N. C, Ky., Tenn., La., Ind., 

 Mich., Oreg. 



Septoria trifolii Ell., leaf-spot. N. J. 



Sphaerulina trifolii Rostr., leaf-spot. N. Y., 111., Mo. 



Thielavia basicola (Berk, and Br.) Zopf, black root-rot. 



Tylenchus dipsaci (Kuehn) Bast., stem nematode. Utah, Pacific Northwest. 



Uromyces fallens (Desm.) Kern, rust. General. 



Mosaic, undet. Conn., Pa., Ark., Ind., Minn. 

 T. repens, white clover. 



Bacterium, trifoliorum L. R. Jones et at., leaf-spot. D. C, Md., Va., N. C, 

 Ind., Wis., Iowa. 



Brachysporium trifolii C. H. Kauffman, blight. D. C. 



Cercospora helvola Sacc, leaf-spot. N. J. 



Corticium vagum Berk, and Curt., stem-rot. N. Y. 



Erysiphe polygoni DC, powdery mildew. W. Va., Idaho. 



Heterodera radicicola (Greef) Muell., root-knot. 



Peronospora trifoliorum D By., downy mildew. Nebr. 



Phyllachora trifolii (Pers.) Fckl., sooty spot. East of Great Plains; Utah. 



Pseudopeziza trifolii (Biv.) Fckl., leaf -spot. Miss. 



Sclerotinia trifoliorum Eriks., root-rot. Miss., Oreg. 



Sphaerulina trifolii Rostr., leaf-spot. N. Y., N. J., 111., Mo. 



Thielavia basicola (Berk, and Br.) Zopf, black root-rot. Conn. 



Uromyces nerviphila (Grognot) Lagh., rust. N. Y., Wis., Colo. 



U. trifolii (Hedw. f.) Lev., rust. General. 



TRITICUM. 



T. aestivum, wheat. 



Bacterium atrofaciens McC. (Phytomonas atrofaciens (McC.) Com. S. A. B.), 



basal glume-rot. General in States between Miss. River and Rocky Mts.; 



Mich., N. Y., Pa. 

 B. translucens undulosum EFS., L. R. Jones, and C. S. Reddy, black-chaff. 



Miss. Valley; Great Plains area; Mont., Idaho. 

 Claviceps purpurea (Ft.) Tul., ergot. Occurs scatteringly, especially on 



durum wheat. 

 Colletotrichum graminicolum (Ces.) Wils., anthracnose. East of Great 



Plains. 

 Erysiphe graminis DC, powdery mildew. General. 

 Fusarium culmorum leteius Sherb., seedling blight. Oreg. 

 Gibberella saubinetii (Mont.) Sacc, scab. General east of Great Plains; 



most prevalent in Corn Belt. 

 Helminthosporium sativum Pam., King, and Bak., foot-rot. Widely dis- 

 tributed, especially in upper Miss. Valley States. 

 Leptosphaeria tritici (S. Garovaglio) Pass., leaf-spot. N. Y., Iowa, Nebr. 

 Marasmius tritici P. A. Young, root-rot. 111. 

 Mycosphaerella tulasnei Jacz. (Cladosporium herbarum (Pers.) Lk.; Hormo- 



dendrum cladosporioides Sacc), sooty mold. N. Y., N. J., W. Va., Ohio, 



Mich., Pacific coast. 

 Ophiobolus graminis Sacc, take-all. N. Y., Md., Va., N. C, Tenn., Ark., 



Ind., Kans., Wash., Oreg., Calif. 

 Podosporiella verticillata P. J. O'Gara, seedling blight. Utah. 

 Puccinia glumarum (Schm.) Eriks. and Henn., stripe-rust. West of Great 



Plains. 

 P. graminis Pers., stem-rust. General; most prevalent in the spring-wheat 



area. 

 P. triticina Eriks., leaf-rust. General, especially prevalent in South. 

 Sclerospora macrospora Sacc, downy mildew. Del., Ky., Tenn., Calif. 

 Sclerotium rhizodes Auer., Sclerotium blight. Idaho, Mont., Wash. 

 Septoria nodorum Berk., glume-blotch. General; most prevalent in South 



and Ohio Valley States. 

 S. tritici Desm., speckled leaf -blotch. General. 

 Tilletia laevis Kuehn, bunt. General. 

 T. tritici (Bjerk.) Wint., bunt. Mostly west of Miss. River. Serious in 



Pacific Northwest. 



