FUNGOUS DISEASES 263 



at the end of the season only a few of the upper leaves 

 remain uninjured. If this loss of leaves occurs early 

 in August, as it sometimes does, the canes are very 

 seriously injured. 



Remedy Spraying as for the anthracnose will also 

 overcome this disease. 



Spring Orange Rust (Coema luminata) This dis- 

 ease first appears in the spring, the leaves and canes 

 attacked being light green in color, which is followed 

 by large masses of golden yellow spores, and the final 

 drying up of the parts attacked. The spores probably 

 germinate during the summer and fall and grow in the 

 tissues near the ground, to start into vigorous growth 

 with the new growth of the canes in the spring. 



Remedy The spraying done for the anthracnose 

 and leaf blight has but little effect upon this pest, as it 

 is growing inside of the plant, but if the plants are 

 thoroughly sprayed two or three times after the fruit 

 is gathered in the summer, the spores will be prevented 

 from germinating and becoming established in the new 

 growth during the latter part of the summer. Also, as 

 soon as the disease can be detected in the spring, all 

 affected canes should.be removed and burned. 



Fall Orange Rust (Phragmidium albida) This 

 disease appears during the latter part of summer and 

 early fall on the under side of the leaves of many varie- 

 ties of the raspberry and blackberry. The clusters of 

 spores are bright orange yellow and are much more 

 scattered than those of the spring orange rust. 



Remedy If spraying is done as soon as the fruit 

 has been gathered, as for the last disease, it will prevent 

 serious injury. 



FUNGOUS PESTS ATTACKING THE BLACKBERRY 



Leaf Spot (Septoria rubi) See under the rasp- 

 berry. 



