LIST OF DISEASES OE ECONOMIC PLANTS 63 



M ALUS — Continued. 



M. sylvestris, apple — Continued. 



Armillaria mellea (Vahl) Quel., root-rot. General, especially in Pacific 



Northwest. 

 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, hairy-root. General. 

 Botryosphaeria ribis Gross, and Dug., black-rot. Va., Ga., Ark. 

 Botrytis cinerea Auct., fruit-rot. Wash. 

 Cephalothecium roseum Cda., pink-rot. General, especially east of Rocky 



Mts. 

 Cercospora mali Ell. and Ev., leaf-spot. Ala., Miss., La., Tex. 

 Clitocybe monadelpha (Morgan) Sacc, root-rot. Va., W. Va., N. C, Ind., 



Mo., Ark., Okla., Tex., Colo., Ariz., Wash. 

 Comandra pallida DC, bastard toadflax. Wash. 

 Corticium laetum Karst., limb-blight. La. 

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



S. C, Ga., Ala., Miss., Tex., Ind. 

 Cytospora sp., canker. Oreg. 



Fomes applanatus (Pers.) Wallr. (Ganoderma applanation (Pers.) Pat.), white- 

 streaked rot. Ind. 

 F '. fomentarius (L.) Fr., white sapwood rot. Mont. 



F. igniarius (L.) Fr., white heart-rot. Conn., N. Y. 

 Fusicoccum pyrorum C. Chupp and G. L. Clapp, canker. N. Y., Md. 

 Gloeodes pomigena (Schw.) A. S. Colby (Phyllachora pomigena (Schw.) Sacc), 



sooty blotch. New England to N. C. and westward to Nebr. 

 Gloeosporium perennans Zeller and Childs, perennial canker. Wash., Oreg. 

 Glomerella cingulata (Ston.) Spauld. and Schrenk, bitter-rot. Mass. to Nebr. 



and southward; occasionally in Pacific Coast States. 

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



G. germinale (Schw.) Kern, rust. Mass., R. I., Va. 

 G. globosum Farl., rust. New England south to Ga. 

 G. juniperi-virginianae Schw., rust. General east of Great Plains. 

 Leptosphaeria coniothyrium (Fckl.) Sacc, orange pox canker. Middle Atlantic 



States; Ohio, Ind., Minn., Kans. 

 Leptothyrium pomi (Mont, and Fr.) Sacc, flyspeck. East of Great Plains; 



occasionally collected in Northwest. 

 Myxosporium corticolum Edg. (Dermatea corticola (Edg.) Arn.), surface bark 



canker. New England, N. Y., Pa., Md., Ohio, Mich., S. Dak., Oreg' 

 Nectria galligena Bres., European canker. Me. to 111. and N. C, Minn., 



Pacific coast. 

 Neofabraea malicorticis (A. B. Cordley) Jack., anthracnose, black-spot 



canker. Pacific Northwest; Mont., Nev., Calif. 

 Nummularia discreta (Schw.) Tul., blister canker. East of Rocky Mts., 



most destructive in Miss. Valley States; N. Dak., S. Dak. 

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

 rot. Ark., Tex., N. Mex., Ariz. 

 Penicillium expansum (Lk.) emend. Thorn, blue-mold rot. General in stored 



fruit. 

 Phoma mali Schulz. and Sacc, twig-blight. Me., Mass., Md., W. Va., 



Okla., N. Mex. 

 P. pomi Pass., fruit-spot. Me. to N. C, and westward to Ark. and Iowa. 

 Phomopsis mali J. W. Roberts, rough-bark disease. Va., Ohio, 111., Pacific 



Coast States. 

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

 Phyllosticta clypeata Ell. and Ev., leaf-spot. Oreg. 

 P. limitata Pk., leaf-spot. Mass., N. Y., W. Va., N. C, Ind. 

 P. prunicola Sacc, leaf-spot. Ohio. 

 P. solitaria Ell. and Ev., blotch. East of Great Plains except New England 



and Fla. 

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



frog-eye. General, especially east of Great Plains, 

 Phytophthora cactorum (Leb. and Cohn) Schroet., fruit-rot. Conn., N. Y., 



Pa., Va., Ind., Mich., Idaho, Wash. 

 Plenodomus fuscomaculans G. H. Coons, canker. Mich., Calif. 



