Orange Rust 163 



it will appear as a bright pink mass a short time after the 

 cane dies. Spraying will help to keep the plantation in 

 a sanitary condition, but plants which have been attacked 

 seldom recover and should be dug up and burned. 



Dropsy. This disease is possibly due to a physiological 

 trouble. It causes a considerable enlargement of the 

 stem. Cutting out the affected canes is most effective. 



Blackberries and Raspberries 



Anthracnose. This fungus causes small purplish spots 

 to form on the canes. Later these spots become gray and 

 sunken, giving somewhat the "bird's eye" effect. The 

 stems and leaves may also become affected and result in 

 severe injury to the entire plant. Control measures have 

 not proven as satisfactory with this disease as with 

 many 'others. Keeping the plantation in a thoroughly sani- 

 tary condition by cultivating and spraying, and removing 

 the affected canes as fast as they show are about the best 

 means of control. 



Cane Blight. In the eastern part of the country this 

 disease has caused considerable loss to small fruit grow- 

 ers. It is a wilt disease attacking the young canes and 

 causing the affected portions to wilt and die. Planting 

 healthy vines and removing the diseased portions when 

 they appear are best means of control. 



Crown Gall. (See Apple.) 



Orange Rust. Among raspberries and blackberries 

 there is a- noticeable difference in different varieties in re- 

 sisting this disease. Kittitinny blackberry is about the most 

 susceptible, although some varieties of dewberries are eas- 

 ily affected. The fungus causing this disease appears on 

 the foliage, the under surface of which turns a bright 

 orange color, and the skin breaks open, liberating the 

 brightly colored spores. Affected canes are usually much 

 more spindling than those which are healthy. Spraying 

 has not proved to be of much service in controlling this 

 disease. Keeping the plantation clean and removing the 



