LIST OF DISEASES OF ECONOMIC PLANTS 39 



CORYLUS. 



Corylus sp., filbert, hazelnut. 

 Bacterium sp., blight. Oreg. 



Cryptosporella anomala (Pk.) Sacc, blight. Conn, to N. C. 

 Cylindrosporium vermiforme Davis, leaf-spot. Wis. 



Gloeosporium coryli Ell. and Ev., leaf-spot. Me., N. J., Pa., Wash., Oreg. 

 Gnomoniella coryli (Batsch) Sacc, leaf-spot. General in Northern States. 

 Microsphaera alni (Wallr.) Wint., powdery mildew. Conn., 111., Iowa, 



N. Dak. 

 Phyllactinia corylea (Pers.) Karst., powdery mildew. Northeastern States. 

 Phyllosticta coryli West., leaf-spot. N. J., Ind., Iowa, Mo. 

 Septogloeum profusum (Ell. and Ev.) Sacc., leaf -spot. Miss. 

 Septoria corylina Pk., leaf-spot. Mass., N. Y., Mich., Pacific coast. 

 Taphrina coryli T. Nishida, leaf -curl. Pa., Wis. 



COSMOS. 



Cosmos sp., cosmos. 



Bacterium solanacearum EFS. {Phytomonas solanaceara (EFS.) Com. S. A. 



B.), bacterial wilt. N. C. 

 Erysiphe cichoracearum DC, powdery mildew. Nebr. 

 Phomopsis stewartii Pk., stem canker. Ohio, Mich., S. Dak. 

 Mosaic, undet. Fla. 



CRATAEGUS. 



Crataegus spp., hawthorn. 



Bacillus amylovorus (Burr.) Trev. (Erwinia amylovora (Burr.) Com. S. A. 



B.), blight. Conn., N. Y., 111., Utah, Wash., Oreg. 

 Cercospora crataegi Heald and Wolf, leaf-spot. Tex. 

 Cercosporella mirabilis Pk., leaf -spot. Colo. 

 Cladosporium carpophilum Thuem., scab. Iowa. 

 Cylindrosporium brevispina Dearn., leaf-spot. Mont., Idaho, Calif. 

 C. crataegi Ell. and Ev., leaf -spot. W. Va. 

 Fabraea maculata (Lev.) Atk., leaf -spot. General. 

 Fomes applanatus (Pers.) Wallr. {Ganoderma applanatum (Pers.) Pat.), 



white-streaked rot. Calif. 

 Gymnosporangium betheli Kern, rust. N. Mex., Northern Rocky Mt. 



States; Pacific Northwest. 

 G. blasdaleanum (Diet, and Holw.) Kern, rust. Oreg., Calif. 

 G. exiguum Kern, rust. Tex. 

 G. floriforme Thax., rust. Ala., Ark. 



G. germinale (Schw.) Kern, rust. General east of Great Plains. 

 G. globosum Farl., rust. General east of Great Plains. 

 G. hyalinum (Cke.) Kern, rust. N. C. to Fla. 

 G. trachysorum Kern, rust. N. C, Ala., La., Miss., Tex. 

 G. tubulatum Kern, rust. Mont., Idaho. 

 Hendersonia crataegi Brenckle, leaf-spot. N. Dak. 

 H.foliorum Fckl., leaf -spot. Tex. 



Phoradendron flavescens (Pursh) Nutt., mistletoe. Tex. 

 Phyllactinia corylea (Pers.) Karst., powdery mildew. N. Y., Fla., Ala., 111., 



Iowa, Wash. 

 Phyllosticta crataegi (Cke.) Sacc, leaf-spot. N. Y., S. C, N. Dak., N. Mex. 

 P. grisea Pk., leaf -spot. N. Y. 

 P. solitaria Ell. and Ev., blotch. N. J. 

 Podosphaera oxyacanthae (DC.) D By., powdery mildew. East of Great 



Plains. 

 Venturia inaequalis (Cke.) Aderh., scab. N. Y. 



CROTON. 



Croton sp., croton. 



Cercospora capitati Tharp, leaf-spot,. S. C, Ala., Tex. 



C. crotonis Ell. and Ev., leaf -spot. Kans. 



C. maritima Tr. and Earle, leaf-spot. Miss. 



Gloeosporium sp., leaf-spot. N. J. 



Phakopsora crotonis (Burr.) Arth., rust. General in southern half of the 



United States. 

 Uromyces graminicola Burr., rust. 111., Kans. 



