Colorado Plant Diseases 
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Brown rot of peach. (After Scott and Ayres.) 
surface of the spots. These spores seem to spread the disease from 
place to place. Spores often fall on ripe fruit causing a decay after 
the fruit is packed and shipped. The fungus passes the winter in 
dead and decayed peaches often called ‘‘mummies.” Hot moist 
weather is favorable to the development of the disease. 
Brown rot may be controlled by spraying with self boiled lime- 
sulfur first about seven or eight weeks before the fruit is expected 
to ripen, and by making a second application about one month before 
the fruit is ripe. 
Blight or Fruit-Spot (Coryneum beyerinckii) (24), (25)— This 
disease occurs in Colorado on peaches and apricots. The fruit leaves 
and stems are affected. Young buds on the fruiting wood are fre- 
quently killed. The green twigs are spotted and the young leaves and 
fruit drop. Injury is commonly accompanied by the formation of 
gum about the wounds. Gumming is very common in wet seasons. In 
badly infected orchards almost the entire crop of fruit may be 
destroyed. The fruit that survives in such cases is so badly spotted 
