CONTENTS 
Page. 
Introduction . 7 
Discussion of Chief Fungous Diseases. i) 
ALFALFA— 
Bacterial blight {Pseudomonas medicaginis) . 9 
Downy mildew (Perofiospora trifoliorum) . 11 
Leaf spot {Pseudopeziza medicaginis) . 11 
APPLE— 
Fire blight {Bacillus amylovorus) . 11 
Rot, black mold {Alternaria sp.). 11 
Crown gall {Pseudomonas tumefaciens) . 12 
Bitter pit . 13 
Jonathan spot . 13 
Powdery mildew {Podosphaera oxycanthae) . 13 
Rust {Gymnosporangium sp.) . 13 
APRICOT— 
Black knot {Plowrighiia morhosa) . 14 
Crown gall {Pseudomonas tumefaciens) . 14 
ASPARAGUS— 
Rust {Puccinm asparagi) . 14 
BEAN— 
Bacterial blight {Pseudomonas phaseoli) .15 
Anthracnose {Colletotrichum lindemutTiianum) . 16 
BEET— 
Root rot {Rhizoctonia) . 17 
Soft rot {Bacterium tcutlium) . 17 
Leaf spot {Cercospora heticola) . 17 
Root knot {nematodes) . 18 
Crown gall {Pseudomonas tumefaciens) . 18 
BLACKBERRY— 
Leaf spot {Septoria ruhi) .'. 18 
Orange rust {Gymnoconia interstitialis) . 19 
Anthracnose {Gloeosporium venetum) . 19 
CABBAGE— 
Club root {Plasmodiopliora hrassicae) . 19 
Black rot {Pseudomonas campestris) . 19 
CANTALOUPE— 
Ijcaf blight or “rust” {Macrosporium, cucumerinum) . 20 
