ii \i;i AND i i N(,K IDI:S 



The mycelium of the fungus also winters over in the 

 tips of the young branches. 



Treatment. A vigorous pruning of all affected 

 branches some distance from the tips, in order to remove 

 the mycelium in the tissues, seems to be the most prac- 

 ticable remedial measure. The pockets should, of 

 course, be removed before maturing, and the safest way 

 will be to burn all the material so cut off. 



Literature. The best article upon this subject so 

 far, published in America, occurs in the United States 

 Department of Agriculture Report for 1888 (pp. 

 3G6-369). 



The Plum Fruit-scab 



Cladosporium carpophilum 



In Iowa and some other localities a comparatively 

 little known disease has recently been noticed on native 



ripening, in the 



d 



FIG. 32. PLUM DISEASES, 

 a, 6, Fruit scab; c, fruit spot. 



plums. It appears when the fruit is 

 shape of minute round specks, of a paler or grayer color 

 than the surrounding skin. These usually enlarge as 

 the fruit ripens, finally attaining a diameter of a quarter, 

 or even half an inch. Several spots sometimes run 

 together to form a blotch. The mycelium of the fungus 



