326 Plums and Plum Culture 



The fruit, the leaves and the young shoots are 

 attacked. Diseased fruits turn yellow, later grayish 

 and finally brown or black. At the same time the fruit 

 swells, becomes puffed up and hollow, and often rat- 

 tles when shaken. These are the plum bladders. 



The leaves when attacked become curled, distorted 

 and strangely misshapen. They also assume a more 

 or less yellowish color. The shoots are also attacked 

 in frequent instances. . They usually become swollen, 

 puffed up, hollow, and turn a light greenish-yellow. 

 Sometimes they are twisted, curled and greatly dis- 



PLUM POCKETS 



"torted. Growth is stopped and the deformed shoot 

 with its distorted leaves forms a characteristic and un- 

 sightly rosette. 



The fungus is perennial, living over in the tissues 

 of the plant. This circumstance adds to the difficulty 

 of treatment. All species of plums are attacked, and 

 probably all species of cherries. The peach is subject 

 to the same trouble also. 



In the way of treatment, nothing can be very pos- 

 itively recommended. It is obviously best to remove 

 all fruits, leaves and twigs as soon as they show the 

 disease, and burn them to prevent the maturation and 

 distribution of the spores. This much perhaps may be 

 insisted on. Further than this, spraying seems to 

 promise some results. Bordeaux mixture will doubt- 



