LIST OF DISEASES OF ECONOMIC PLANTS 101 



TRAGOPOGON— Continued. 



T. porrifolius, vegetable-oyster, salsify — Continued. 

 Sclerotinia intermedia G. B. Ramsey, root-rot. 111. 

 Verticillium sp., wilt. N. Y. 



TRIFOLIUM. 



T. hybridum, alsike clover. 



Bacillus lathyri Manns and Taub., streak. Del. 



Bacterium trifoliorum L. R. Jones et al., bacterial leaf-spot. General in 



Eastern States. 

 Cercospora zebrina Pass., leaf-spot. Va., Ind. 

 Colletotrichum trifolii S. M. Bain, anthracnose. East of Great Plains; Colo., 



Wash. 

 Corticium vagum Berk, and Curt., root-rot. Ohio, Minn. 

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

 Phyllachora trifolii (Pers.) Fckl., sooty spot. Minn. 

 Sclerotinia trifoliorum Eriks., root-rot. Mich. 

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

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

 Uromyces trifolii (Hedw. f.) L6v., rust. General. 

 Mosaic, undet. Pa. 

 T. incarnatum, crimson clover. 



Bacterium trifoliorum L. R. Jones et al., leaf-spot. Md., Va., N. C, Ind., 



Wis., Iowa. 

 Botrytis sp., gray-mold. Del. 



Cercospora medicaginis Ell. and Ev., leaf -spot. Del. 

 Colletotrichum trifolii S. M. Bain., anthracnose. Ky. 

 Corticium vagum Berk, and Curt., root-rot. N. C. 

 Gloeosporium caulivorum L. Kirchner, anthracnose. N. C. 

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

 Macrosporium sp., leaf -spot. Va. 



Phyllachora trifolii (Pers.) Fckl., sooty spot. Pa., Md., Ga., Ala., N. Dak. 

 Sclerotinia trifoliorum Eriks., root-rot. N. J., Md., N. C, S. C, Ky., 



Tenn., Oreg. 

 Sclerotium rolfsii Sacc, stem-rot. La. 

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

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

 Uromyces fallens (Desm.) Kern, rust. Del., Ind., S. Dak,. 

 U. trifolii (Hedw. f.) L4v., rust. Pa., Ala., Wis., Minn. 

 Mosaic, undet. Pa. 

 *T. medium, zigzag clover. 



Bacterium trifoliorum L. R. Jones et al., leaf-spot. Md., Va., N. C, Ind., 



Wis., Iowa. 

 Uromyces trifolii (Hedw. f.) L6v., rust. 

 T. pratense, red clover (includes *T. medium perenne, mammoth clover). 

 Bacillus lathyri Manns and Taub., streak. Del. 

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



Ind., Wis., Iowa. 

 Botrytis sp., gray-mold. Pa. 



Cercospora medicaginis Ell. and Ev., leaf-spot. N. J. 

 C, zebrina Pass., leaf -spot. N. Y., Mich., Ind., Iowa. 

 Colletotrichum destructivum P. J. O'Gara, anthracnose. Utah. 

 C. trifolii S. M. Bain, anthracnose. N. Y., Pa., N. J., Del., Va., Ohio, 



Ind., Mich., Wis., Ky., Tenn. 

 Cuscuta spp., dodder. N. Y., Del., Md., La., Ohio, Nebr. 

 Erysiphe polygoni DC, powdery mildew. Widespread, especially abundant 



east of Great Plains. 

 Gloeosporium caulivorum L. Kirchner, anthracnose. N. Y. to Va., westward 



to Mo. 

 Heterodera radicicola (Greef) Muell., root-knot. W. Va., La., Utah. 

 Macrosporium sarcinaeforme Cav., leaf-spot. East of Great Plains. 

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



Oreg. 

 Pseudopeziza trifolii (Biv.) Fckl., leaf-spot. Widespread in Northern 



States. 



