FUSISPORIUM DISEASE OF POTATOES. 



time, generally varying from three weeks to three months 

 (two months is a common time), and during this period 

 they become slightly spinulose, and faintly tinted with a 

 brownish hue. These little bodies, therefore, hibernate 

 after the manner of resting-spores, and it is possible that 

 many of them rest during the entire winter. A spore 

 which has hibernated is shown at E, Tig. 11. The ovate 



FIG. 11. 



Fusisporium Solani, Mart. Spores in different stages of growth. 

 Enlarged 1000 diameters. 



bodies at F, Fig. 10, are grains of starch within a cell of 

 .the potato tuber. 



The destruction of potatoes is complete when the Fusis- 

 porium works in company with the Peronospora, and 

 when the spawn-threads of both fungi are interlaced, a 

 condition very often observed in the midland and southern 

 counties. 



In experimenting on the growth of this fungus, it is 

 very easy to transfer the flocculent or semi-mucilaginous 

 D 



