LIST OF DISEASES OF ECONOMIC PLANTS 55 



IRIS. 



Iris sp., iris. 



Bacillus carotovorus L. R. Jones (Erwinia carotovora (Jones) Com. S. A. B.), 

 soft-rot. Conn., N. Y., N. J., Ohio, Ind., Mich., Minn. 



Cylindrosporium iridis Ell. and Hals., leaf-spot. Ind., Iowa. 



Didymellina iridis (Desm.) Hoehn., leaf-spot. Widespread in northern two- 

 thirds of United States. 



Macrosporium iridicolum Ell. and Ev., leaf-spot. Idaho. 



M. iridis Cke. and Ell., leaf-spot. Ala., Ohio, Mont. 



Pseudomonas iridis Van Hall, rhizome rot. S. Dak. 



Puccinia iridis (DC.) Rabh., rust. Conn., N. Y., Mich., Colo., Pacific 

 coast. 



Sclerotinia sclerotiorum (Lib.) Mass., stem-rot. Wash. 



Sclerotium rolfsii Sacc, crown-rot. Md., Ind., Miss., Calif. 



Scolecotrichum iridis Fautr. and Roum., leaf-spot. Miss., Minn. 



S. punctulatum Tr. and Earle, leaf-spot. Miss. 



Septoria sp., leaf-spot. N. Dak. 

 I. versicolor, blueflag iris. 



Cylindrosporium iridis Ell. and Hals., leaf -spot. Ind. 

 . Didymellina iridis (Desm.) Hoehn., leaf-spot. Ind. 



Phyllosticta iridis Ell. and Mart., leaf-spot. N. Y., Fla., Ohio, Mich. 



Puccinia iridis (DC.) Rabh., rust. Northeastern States. 



P. majanthae (Schum.) Arth. and Holw., rust. Mass., N. Y., Ind., Mich., 

 Wis., Minn., Iowa, Nebr. 



JUGLAN8. 



J", cinerea, butternut. 



Cercospora juglandis Kell. and Sw., leaf -spot. Mass. 



Fomes igniarius (L.) Fr., white heart-rot. Vt., N. J. 



Gnomonia leptostyla (Fr.) Ces. and DeNot., anthracnose. General through- 

 out range of host. 



Melanconis juglandis (Ell. and Ev.) A. H. Graves, canker. East of Miss. 

 River; Wis., Iowa. 



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



Micro stroma juglandis (Bereng.) Sacc, leaf-spot. General over range of host. 



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



Polyporus sulphureus (Bull.) Fr., brown-checked wood-rot. 

 /. hindsii, Hinds walnut. 



Cylindrosporium juglandis Wolf, leaf -spot. Calif. 



Microstroma juglandis (Bereng.) Sacc, leaf -spot. Calif. 

 J. nigra, black walnut. 



Armillaria mellea (Vahl) Quel., root-rot. Oreg. 



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

 Town.) Com. S. A. B.), crown-gall. Kans., Calif. 



Cercospora juglandis Kell. and Sw., leaf-spot. Kans. 



Fomes everhartii (Ell. and Gall.) Schrenk, heart-rot. 



F. igniarius (L.) Fr., white heart-rot. Ohio. 



Gnomonia leptostyla (Fr.) Ces. and DeNot., anthracnose. General through- 

 out range of host. 



Melanconis juglandis (Ell. and Ev.) A. H. Graves, canker. N. Y. 



Microsphaera alni (Wallr.) Wint., powdery mildew. Ind., 111., Kans., Miss. 



Microstroma jualandis (Bereng.) Sacc, leaf-spot. Del., Md., N. C, Ohio, 

 111., Mo., Kans. 



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

 rot. Tex. 



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



Phleospora multimaculans Heald and Wolf, leaf-spot. Tex. 



Polyporus sulphureus (Bull.) Fr., brown-checked wood-rot. 



Septoria juglandis Berk, and Curt., leaf-spot. Pa., N. C. 

 J. regia, Persian walnut (English walnut). 



Armillaria mellea (Vahl) Quel., root-rot. Oreg., Calif. 



Bacterium juglandis (N. B. Pierce) EFS., bacterial blight. N. Y., Del., Va., 



B. tumefaciens EFS. and Town. {Phytomonas tumefaciens (EFS. and Town.) 

 Com. S. A. B.), crown-gall. Pacific coast. 



