Symptoms 



powdery white mildew ; leaves more or 

 less striated. Mildew caused by Erysiphe 

 cichoracearum. Spraying with liver of sul- 

 phur (7). 



Azalea indica. 



Bvds and Foliage. — Terminal bud or leaves 

 near tip of stem become swollen to many times 

 their normal size, pink, and subsequently 

 covered with a white bloom. Remove the 

 galls, which are caused by the fungus Exo- 

 basidium japonicum, and bum before the white 

 bloom (the spores) is developed (3). 



A similar fungus forms galls on Bhododen- 

 dron ferrugineum and other species (p. 95). 



Bean, Broad. 



Foliage. — Reddish-brown spots, showing 

 heaps of chestnut spores upon them under the 

 lens, on foliage. Rust caused by Uromyces 

 Fdbae. Not as a rule serious early enough to 

 warrant spraying, but Bordeaux mixture or 

 potassium permanganate (7) may be used if 

 it is thought necessary. Bum rusted stems 

 instead of putting them on rubbish heap. 



Bean, Dwabe and Rtjnneb. 



Foliage and Fruit. ■ — Reddish round or 

 roundish depressed spots on fruit, brown 

 rounded spots on foliage and stems ; ia all 

 cases distinctly margined. Spot disease due 

 to Colletotrichum Lindemuthianum. Spray with 

 70 



