72 HORTICULTURIST'S RULE-BOOK. 



plants are growing rapidly, by high temperature running 

 the same day and night, by watering just before night, by 

 too little water, by extreme dryness, by poor drainage, by 

 deficiency in plant-food. 



Remedies. Fumes of sulphur. Copper fungicides. 



RUST (Phragmidium mucronatum, Winter). Appears in 

 small and scattered bright yellow spots or pustules on the 

 leaves, which at length become distorted, and upon the 

 young growth. 



Remedy. Spray with Bordeaux mixture or other fungi- 

 cides. 



Spinage. Several fungi attack the spinage, of which the fol- 

 lowing are the worst : 



ANTHRACNOSE (Colletotrichum /Spinacece, Ell. & Hals.). 

 Producing brown and gray blotches upon the leaves ; 



LEAF-BLIGHT (Phyllosticta Chenopodii, Sacc.). Forming 

 many minute pimples on the leaf, usually upon its under 

 surface ; 



MILDEW (Peronospora effusa, Rabenh.). Producing violet- 

 gray patches upon the under side of the leaves and yellow 

 spots above; 



WHITE SMUT (Entyloma Ellisii, Hals.). Covering the whole 

 leaf with a white coat. 



Remedies. No definite remedies are yet known for these 

 diseases. Spraying with copper fungicides will undoubtedly 

 check them, but this procedure is generally impracticable 

 upon spinage. Burning all affected plants, and rotation, 

 are to be advised. 



Squash. POWDERY MILDEW. See under MUSKMELON. 

 Strawberry. LEAF-BLIGHT, RUST or SUN-BURN (Sphcerella 

 Fragarice, Sacc., including Ramularia). Small purple or 

 red spots appearing on the leaves. They eventually become 

 larger and browner, making the leaf appear blotched. Most 

 serious after the fruit is picked, lessening the crop of the 

 following year. 



Remedies. Spray with Bordeaux mixture or ammoniacal 

 carbonate of copper at intervals of two weeks, beginning as 



