LIST OF DISEASES OF ECONOMIC PLANTS 29 



BRASSICA— -Continued. 



B. oleracea caulorapa, kohlrabi. 



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

 Peronospora parasitica (Pers.) D By., downy mildew. Va., Fla. 

 Plasmodiophora brassicae Wor., clubroot. Conn., Mass., N. Y., Ohio, 



Miss. 

 B. oleracea gemmifera, Brussels sprouts. 



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



soft-rot. Minn. 

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

 Mycosphaerella brassicicola (Ft.) Lindau, ring-spot. Calif. 

 Phoma lingam (Tode) Desm., black-leg. N. Y. 

 Plasmodiophora brassicae Wor., clubroot. Alaska. 

 Pythium debaryanum Hesse, damping-off. Minn. 

 Sclerotinia sclerotiorum (Lib.) Mass., drop, watery soft-rot. La. 

 B. pekinensis, petsai cabbage, Chinese cabbage. 



Alternaria brassicae (Berk.) Sacc, black leaf-spot. Conn., Fla. 



A. herculea (Ell. and Mart.) J. A. Elliott, gray leaf-spot. Fla., Calif. 



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



soft-rot. Conn. 

 Bacterium campestre (Pam.) EFS. (Phytomonas campestre (Pam.) Com. 



S. A. B.), black-rot. Md. 

 Cercospora bloxami Berk, and Br., leaf-spot. Fla. 

 Cercosporella albo-maculans (Ell. and Ev.) Sacc, leaf-spot. Conn. 

 Cylindrosporium brassicae Fautr. and Roum., leaf-spot. Md., Mo. 

 Sclerotinia sclerotiorum (Lib.) Mass., drop. Mass. 

 Mosaic, undet. 

 B. rapa, turnip (white). 



Albugo Candida (Pers.) O. Kuntze, white-rust. Reported in seven scattered 



States. 

 Alternaria sp., black leaf-spot. Ind., Tex., Utah. 

 A. herculea (Ell. and Mart.) J. A. Elliott, gray leaf -spot. N. J., Ohio, 



Fla., Ala. 

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



soft-rot. Reported from widely scattered States. 

 Bacterium campestre (Pam.) EFS. (Phytomonas campestre (Pam.) Com. S. A. 



B.), black-rot. Eastern States. 

 ■Cercosporella albo-maculans (Ell. and Ev.) Sacc, leaf-spot. General. 

 C olletotrichum brassicae Schultz. and Sacc, leaf -spot. Ga. 

 €. higginsianum Sacc, leaf-spot. S. C, Ga., Fla., Ala., Miss. 

 Corticium vagum Berk, and Curt., stem-rot. Mass., Ohio, Wash. 

 Cylindrosporium brassicae Fautr. and Roum., leaf-spot. Ga. 

 Erysiphe polygoni DC, powdery mildew. Occurs in widely scattered States. 

 Fusarium conglutinans Woll., yellows. Ind. 



Heterodera radicicola (Greef) Muell., root-knot. S. C, Ga., Ala., Tex. 

 Peronospora parasitica (Pers.) D By., downy mildew. Frequent east of 



Great Plains. 

 Phoma napobrassicae Rostr., root-rot. Conn. 

 Plasmodiophora brassicae Wor., clubroot. East of Great Plains; Colo., 



Wash.; especially in Northeastern States. 

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

 Mosaic, undet. Ind. 



BROMUS 



B. inermis, *Hungarian bromegrass. 



Bacterium coronafaciens atropurpureum C. S. Reddy and James Godkin, bac- 

 terial blight. Wis., N. Dak., S. Dak. 

 Claviceps purpurea (Fr.) Tul., ergot. Conn., Minn., Iowa, N. Dak., Nebr. 

 Erysiphe graminis DC, powdery mildew. Minn. 

 H elminthosporium giganteum Heald and Wolf, leaf-spot. D. C 

 Phyllachora graminis (Pers.) Fckl., tar-spot. N. Dak. 



Pyrenophora bromi (Died.) Drechs., leaf-blotch. Pa., Wis., Minn., N. Dak. 

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

 Septoria bromi Sacc, leaf -blotch. Wis. 

 S. bromigena Sacc, leaf-spot. N. Dak. 

 Ustilago bromivora (Tul.) Fisch., smut. Iowa, Oreg. 



