42 BULLETIN 1366, TJ. S. DEPARTMENT OF AGRICULTURE 



CYDONIA— Continued. 



C. oblonga, common quince. 



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



blight. General. 

 Bacterium tumefaciens EFS. and Town. {Phytomonas tumefaciens (EFS. 



and Town.) Com. S. A. B.), crown-gall. N. J., Pa., Ohio, N. C, Tex., 



Wash., Oreg. 

 Corticium stevensii Burt (Hypochnus ochroleucus F. Noack), leaf -blight. 



N. C. 

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

 Glomerella cingulata (Ston.) Spauld. and Schrenk, bitter-rot. Mass., R. I., 



Pa., Va., W. Va., Mich., Ind., Kans. 

 Gymnosporangium blasdaleanum (Diet, and Holw.) Kern, rust. Oreg. 

 G. clavariaeforme (Jacq.) DC, rust. Me., N. H., Conn. 

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

 G. nelsoni Arth., rust. Colo. 

 G. nidus-avis Thax., rust. Conn., N. Y. 

 Render sonia cydoniae Cke. and Ell., leaf -spot. Conn. 

 Neofabraea malicorticis (A. B. Cordley) Jack., anthracnose. Oreg. 

 Ozonium omnivorum Shear (Phymatotrichum omnivorum (Shear) Dug.), root- 

 rot. Tex. 

 Phoma cydoniae Sacc, pale-rot. 111., Mich. 

 P. pomi Pass., fruit-spot. N. EL, N. J., Pa., Md. 

 Phyllactinia corylea (Pers.) Karst., powdery mildew. Va. 

 Physalospora malorum (Pk.) Shear (P. cydoniae Am. Auct.), black-rot. East 



of Great Plains. 

 Podosphaera leucotricha (Ell. and Ev.) Salm., powdery mildew. Wash. 

 P. oxyacanthae (DC.) D By., powdery mildew. N. Y., 111., Ind. 

 Sclerotinia cinerea (Bon.) Scnroet. (Monilia oregonensis Barss and Posey), 



blossom blight. Wash., Oreg. 

 S. fructicola (Wint.) Rehm (S. americana (Wormald) Norton and Ezekiel), 



brown-rot. N. Y., W. Va., Oreg. 



CYNARA. 



C. scolymus, globe artichoke. 



Botrytis cinerea Auct., rot. N. Y., Calif. General with host. 



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



Cladosporium sp., leaf -blight. S. C. 



Corticium vagum Berk, and Curt., stem-rot. Miss. 



Ozonium omnivorum Shear (Phymatotrichum omnivorum (Shear) Dug.), 



root-rot. Tex. 

 Sclerotium rolfsii Sacc, stem-rot. Ga. 



DACTYLIS. 



D. glomerata, orchard grass. 



Claviceps microcephala (Wallr.) Tul., ergot. Ind., Alaska. 

 C. purpurea (Fr.) Tul., ergot. N. Y., Va., W. Va., Minn. 

 Colletotrichum graminicolum (Ces.) Wils., anthracnose. Pa., Miss., Ohio, 



Minn. 

 Erysiphe graminis DC, powdery mildew. N. Y., Pa., Minn., Idaho, Utah. 

 Gibberella saubinetii (Mont.) Sacc, scab. W. Va. 

 Helminthosporium sp., leaf-spot. Minn. 

 Puccinia graminis Pers., stem-rust. General. 

 Rhynchosporium secalis (Oud.) Davis, scald. Wis. 

 Scolecotrichum graminis Fckl., leaf -spot. Widespread. 

 Uromyces dactylidis Otth, leaf-rust. Va., N. C. 

 Ustilago striaeformis (West.) Niessl, stripe-smut. General. 



DAHLIA. 



Dahlia sp., dahlia. 



Bacterium solanacearum EFS. (Phytomonas solanaceara (EFS.) Com. S. A. B.), 



bacterial wilt. N. C 

 Botrytis sp., bud-rot. N. J., Pa., Mich. 

 B. sp., storage root-rot. N. J. 

 Corticium vagum Berk, and Curt., stem-rot. Md. 

 Erysiphe cichoracearum DC, powderv mildew. Conn., Md., N. C, W. Va'., 



Ohio, Wash., Calif. 



