Insect and Disease Cmitrol 257 



peach spraying but in the peach industry. By the proper use 

 of this preparation brown-rot is almost completely controlled. 

 Directions for its preparation and use appear on page 285. 

 It has been observed in some cases that the control of 

 the curculio very greatly lessened the prevalence of brown- 

 rot. The fungus finds ready entrance into the fruit through 

 wounds in the skin. The wounds made by the curculio 

 in feeding and in laying its eggs, therefore, offer points 

 of entrance for the fungus which do not occur on fruit not 

 attacked by this insect. 



Peach-scab {Cladosporium carpophilum) 



This disease, known also as "freckles," "black-spot," 

 and by other names, is second only to brown-rot in its de- 

 structiveness of the fruit. In some of the mountain dis- 

 tricts it causes even greater loss than brown-rot. It occurs 

 practically everywhere that peaches are grown. 



While the great economic importance of this disease is 

 in the damage it causes to the fruit, it also attacks the 

 twigs and the foliage. 



Course of development. 



In outlining the development of this disease Scott states 

 substantially as follows : " The scab fungus which grows 

 in the skin of the fruit produces small, circular, dark-brown 

 spots, one eighth of an inch or less in diameter. Several 

 spots may coalesce, forming large, irregular scab areas. 

 In bad cases the fruit becomes sooty in appearance and the 

 skin cracks. 



" The fungus also attacks the twigs, producing small brown 

 spots, which are common in most peach orchards. The 



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