THE FUNGOID DISEASES OF PLANTS. 297 
Cabbage. Club root, Plasmodiophora Brassicce Wor. Leaf 
molds, Alternaria Brassica and A. macrospora Sacc. 
Celery. Leaf blight, Cercospora Apii Fr. 
Corn. Leaf blight, Helminthosporium turcicum Pass. Rust, 
Puccinia Sorghi Schw. Smut, Ustilago Zea (Beckm.) Ung. 
Cucumber. Downy mildew, Plasmopara cubensis (B. and C.). 
Anthracnose, Colletotrichum lagenarium (Pass). Scab, Cladosporium 
cucumerinum (Ell. and Arth.). 
Grape. Anthracnose, Sphaceloma ampelium DeBy. Black 
rot, Guignardia bidwellii (Via. and Rav.). Downy mildew, 
Plasmopora viticola (Ber. and De Ton.) Gray mold, Botrytis. 
Powdery mildew, Uncinula necator Bur. 
Muskmelon. Anthracnose, Collototrichium lagenarium Ell. 
and Hals. Downy mildewy Plasmopora cubensis Humph. 
Oat. Black-stem rust, Puccinia graminis. Smut, Ustilago 
Avena Jens. 
Onion. Black mold, Macrosporium Porri Ell. Black spot, 
Vermicularia circinans Berk. Downy mildew, Peronospora schlei- 
deni Ung. Smut, Urocystis Cepula. 
Peach. Brown rot, Sclerotina frutigena Schrt. Leaf blight, 
Cercosporella Persica Sacc. Leaf curl, Exoascus deformans Fckl. 
Scab, Cladosporium carpophilum Thm. 
Pear. Black mold, Fumago vagans Pers. Leaf spot, Spetoria 
piricola Desm. Rust, Gymnosporangium globosum Farl. 
Plumb. Black knot, Plowrightia morbosa Sacc. Brown rot, 
Sclerotina frutigena Schrt. x Powdery mildew, Podosphara oxya- 
cantha DeBy. 
Potato. Blight, Phytpphora infestans (one of the most destruct- 
ive of our plant diseases). Dry rot, Fusarium oxysporum Schl. 
Scab, Oospora scabies Thaxt. 
.Squash. Anthracnose, Colletotrichum lagenarium (Pass.) Ell. 
and Hals. Black mold, Rhizorpus nigricans Ehr. Metallic mold, 
Choanephora cucurbitarim Tha. 
Strawberry. Fruit rot, Botrytis vulgaris Fr. Leaf blotch, 
Ascochyta Fragaria Sacc. Leaf spot, Sphearella Fragaria Sacc. 
Tobacco. Frost fungus, Botryosporium pulchrum Cda. 
