320 THE PARASITIC DISEASES OF PLANTS 
Apple.—Bitter rot, Glomerella rufomaculans; black rot, canker 
and leaf spot, Physalospora Cydonia; powdery mildew, Podo- 
sphera leucotricha; rust, Gymnosporangium Juni peri-virginiane; 
scab, Venturia inequalis; sooty blotch, Leptothyrium Porut. 
Asparagus.—Rust, Puccimia Asparagt. 
Bean.—Anthracnose, Colletotrichum lindemuihianum; downy 
mildew, Phytophthora Phaseolt; rust, Uromyces Phaseolt. 
Beet.—Leai blight, Cercospora Bettcola. 
Cabbage.—Club root, Plasmodiophora Brassica; downy mil- 
dew, Peronospora parasitica. 
Celery.—Early leaf blight, Cercospora Apu; late blight, 
Septoria Petroselint var. A pit. 
Corn.—Rust, Puccinia Sorghi; smut, Ustilago Zee. 
Cucumber.—Downy mildew, Plasmopara cubensis; anthrac- 
nose, Colletotrichum lagenarium, Cladosporium Cucumerinum. 
Grape.—Anthracnose, Gloeosporium ampelophagum,; black rot, 
Guignardia Bidwellii; downy mildew, Plasmopara Vuitcola; 
powdery mildew, Uncinula necaior. 
Muskmelon.—Anthracnose,  Colletoirichum lagenarium; 
downy mildew, Plasmopara cubensis. 
Oat.—Black stem rust, Puccinia graminis; crown rust, Puccinia 
coronaia; smut, Usitlago Avene. 
Onion.—Black mold, Macrosporium porrt; black spot, Vermicu- 
laria circinans; downy mildew, Peronospora Schleideni; smut, 
Urocystis Cepule. 
Peach.—Brown rot, Sclerotinia cinerea; leaf curl, Exoascus 
deformans; frosty mildew, Cercosporella Persice; scab, Clado- 
sporium carpophilum. 
Pear.—Leaf spot, Mycos pherella sentina; scab, Venturia Pyrina; 
eastern rust, Gymnosporangium globosum. 
Plum.—Black knot, Plowrightia morbosa; brown rot, Sclerotinia 
cinerea; powdery mildew, Podosphera oxyacanthe. 
Potato.—Late blight, Phytophthora infestans (one of the 
most destructive of our plant diseases) ; wilt, Fusarium oxysporum; 
scab, Actinomyces scabies. 
