88 



FUXGI AXD FUXGICIDES 



green parts of the plant, nsnally doing most damage to 

 the young shoots and the fruit. On the former it ap- 

 pears at first in the shape of 

 small round brown spots, 

 depressed in the center, and 

 having a shglirly elevated 

 dark colored border. As the 

 shoots grov t '? ""rs o-pad- 

 ually elong:r: _ their 



middle p become 

 more distinctly ivssed be- 

 cause of the killing of the 

 tissue. The effect upon the 

 fruit is well illustrated in 

 Fig. 43 : there first appears 

 a small grayish spot, having- 

 its margins dark brown. 

 The spot gradually enlarges, 

 and there is frequently de- 

 veloped just inside the dark 

 brown margin a bright ver- 

 milion ring. On acconnt of 

 this, the disease is often 

 called the ''Bird's-eye" Eot. 

 As the fungus progresses the 

 growth of the berry is- 

 checked. and it finally be- 

 comes a dry. witliered mass 

 of skin, surrounding the par- 

 tially developed seeds. The 

 manner of development upon 

 the leaves is similar to that 

 upon the green shoots. Like 

 other fungi, the anthrac- 

 nose fungus reproduces by means of minute spores, some 

 of which are represented, highly magnified, at Fig. -l-i 



FIG. 43. ELVIRA GRAPE AFFECTED 

 BY AXTHRA' V'.'^E. 



