CONTENTS (Continued) 
I’age. 
ONION— 
Blight or mildew {Peronospora schleideniana) . 31 
PEA— 
Powdery mildew {Erysiphe polygoni) . 31 
PEACH— 
Scab (Cladosporium carpophilum) . 32 
Blight iCoryneum heijerinckii) . 32 
Powdery mildew (SpTiaerotheca pannosa) . 32 
PEAR— 
Fire blight {Bacillus amylovorus) .. 34 
Crown gall {Pseudomonas tumefaciens) . 36 
Rust {Gyynnosporangium sp.) . 36 
PLUM— 
Plum pockets {Exoascus pruni) . 36 
Fire blight {Bacillus amylovorus) . 37 
Crown gall {Pseudomonas tumefaciens) . 37 
Shot hole {Cylindrosporium padi) . 37 
Black knot {Ploivrightia morhosa) . 37 
POTATO— 
Early blight {Alternaria solani) . 
Scab {Oospora scabies) . 
Fusarium wilt or blight {Fusarium oxysporum) 
Rhizoctonia {Corticium vagum var. solani).... 
Internal brown-spot . 
39 
41 
41 
RADISH— 
White “rust” {Oystopus candidus) . 43 
RASPBERRY— 
Anthracnose {Qloeosporium venetum) . 43 
Spur blight {Sphaerella rubina) . 45 
Orange rust {Oymnoconia interstitialis) . 45 
STRAWBERRY— 
Leaf spot or leaf blight (Mycosphaerella fragariae) . 46 
Black root. 46 
TOMATO— 
'Fungous blight {Fusarium si>.) . 46 
Fruit rot, blossom end rot.. 47 
