34 



FUXGI AXD FUXGICIDES 



not worth gathering up because of the rot with which 

 they are wholly or in part affected." Other southern 

 states sutler equally serious losses. One orchard in 

 Arkansas has been reported in which, in 1887, the attack 

 of the fungus was so severe that seventy-five trees yielded 

 less than twenty-five bushels of fruit. A photographic 

 view of one of the depressed rotten spots as it appears on 

 the maturinor fruit is shown in Fiof. 17. 



This disease is distinguished after it has become 

 well established by the jDresence of small blackish pus- 



^"%*. 



\ 



i^''* 



FIG. 17. APPLE SHOWING EOT SPOT. 



tules scattered over the surface of the apple. These are 

 the fruiting spots of the fungus. The mycelium which 

 has penetrated the pulpy tissue of the fruit in all direc- 

 tions, disorganizing it and causing the rot, here develops 

 a large number of cells, which rupture the skin of the 

 apple and produce the spores at the tips of slender pro- 



