LIST OF DISEASES OE ECONOMIC PLANTS 25 



BEGONIA — Continued. 



Begonia sp., begonia — Continued. 



Heterodera radicicola (Greef) Muell., root-knot. Ohio, Ind., Nebr., Calif. 



(greenhouse) . 

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



BENZOIN. 



B. aestivale, spicebush. 



Hymenochaete agglutinans Ell. Appalachian Mts. 

 Phoradendron flavescens (Pursh) Nutt., mistletoe. Eastern States. 

 Phyllosticta linderae Ell. and Ev., leaf-spot. Del., W. Va. 

 P. lindericola Ell. and Ev., leaf-spot. W. Va. 



BERBERIS. 



B. canadensis, Allegheny barberry. 



Puccinia graminis Pers., rust. Va., W. Va. 

 B. thunbergii, Japanese barberry. 



V erticillium alboatrum Reinke and Berth., wilt. N. Y. 



Bacterial leaf-spot, undet. N. Y., Minn. 

 B. vulgaris, common barberry. 



Puccinia graminis Pers., rust. General wherever host occurs. 



Bacterial leaf-spot, undet. N. Y., Wis., Iowa, Nebr., Wash. 



BETA. 



B. vulgaris, beet. 



Actinomyces scabies (Thax.) Gues., scab. Frequent where beets are grown. 



Bacterium teutlium H. A. Metcalf, soft-rot. Nebr. 



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



Com. S. A. B.), crown-gall. Conn., Pa., Wis., Idaho. 

 Cercospora beticola Sacc, leaf -spot. General. 

 Corticium vagum Berk, and Curt., root-rot. Occurs scatteringly, especially 



throughout the Northern States. 

 Fusarium culmorum leteius Sherb., seedling blight. Pacific coast. 

 Heterodera radicicola (Greef) Muell., root-knot. Southern States, Ark., 



Ind., Kans., Colo., Calif. 

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



root-rot. Tex. 

 Peronospora schachtii Fckl., downy mildew. N. Y., Calif. 

 Phoma betae (Oud.) Frank, root-rot and leaf-spot. N. J., N. C, Mich., 



Wis., N. Dak., S. Dak., Kans., Colo., N. Mex., Wash., Oreg. 

 Puccinia sarcobati (Pk.) Bethel, rust. Utah. 

 Pythium aphanidermatum (Edson) Fitz., damping-off. Wis. 

 P. debaryanum Hesse, damping-off. Conn. 



Sclerotinia sclerotiorum (Lib.) Mass., watery soft-rot. Conn., 111. 

 Sclerotium rolfsii Sacc, stem-rot. S. C, Ga., La. 

 Septoria betae West., leaf -spot. Mass., Del., Ind. 

 Tylenchus dipsaci (Kuehn) Bast., stem nematode. Kans. 

 Uromyces betae (Pers.) Lev., rust. Colo., Oreg., Calif. 

 Curly-top, undet. Tex., Colo., Utah, Calif. 

 B. vulgaris, sugar beet. 



Actinomyces scabies (Thax.) Gues., scab. Conn., Ohio, Idaho. 



Bacterium aptatum N. Brown and C. Jamieson (Phytomonas aptatum (Brown 



and Jamieson) Com. S. A. B.), leaf -spot. Utah. 

 • B. beticolum EFS., N. Brown, and Town. (Phytomonas beticolum (EFS., 



Brown, and Town.) Com. S. A. B.), tuberculosis. Va., Kans., Colo., Utah. 

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



Com. S. A. B.), crown-gall. Ohio, Utah, Colo., Idaho, Calif. 

 Cercospora beticola Sacc, leaf -spot. General. 

 Corticium vagum Berk, and Curt., root-rot. General. 

 Fusarium sp., root-rot. Ind., Mich., Kans., Western States. 

 Heterodera radicicola (Greef) Muell., root-knot. Ohio, Texas, Western States. 

 H. schachtii A. Schmidt, sugar-beet nematode. Wyo., Colo., Utah, Idaho, 



Calif. 

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

 rot. Tex. 



