SPINACH ANTHRACNOSE 291 



SPINACH ANTHRACNOSE 



(Colletotrichum spinaceae, Ellis and Hals.) 



This disease has proved especially destructive to spinach 

 in the United States. The spots formed on the leaves are 

 at first minute, and present a moist appearance. These 

 gradually increase in size, become grey, dry, and studded 

 with numerous dark points, often on both surfaces of the 

 patch. The fruit comes to the surface through the 

 stomata. 



Halsted, N. Jersey Agric. Coll. Expt. Station, Bull. 70, 

 figs. 



CHERRY AND PLUM LEAF BLIGHT 



(Cylindrosporium padi, Karsten.) 



According to Fairchild, nursery stock of cherries and 

 plums are often severely attacked, the leaves falling so 

 early as to render the first year's growth of stocks almost 

 insignificant. Plum trees suffer more than cherries, as the 

 leaves fall while yet green, whereas in the latter the leaves 

 often assume autumnal tints before falling. Great variation 

 exists as to the susceptibility of different varieties, the 

 English Morello cherry being especially victimised. 



The disease appears under the form of small, round, 

 purple spots on the leaf, these eventually become brown, 

 dry up, and drop out, leaving holes in the leaf. 



PREVENTIVE MEANS. Bordeaux mixture arrests the 

 disease. Spray first when the leaves are expanding, and 

 again after an interval of three weeks. 



Fairchild, Journ. Mycol., vol. vii. p. 249, pi. xxi.-xxix. 

 (1893)- 



