Peach. 



331 



upon the buds and twigs, for when buds are taken from dis- 

 eased trees and inserted in nursery stock the resulting shoots 

 generally show the dis- 

 ease, although there 

 was no apparent infec- 

 tion when the budding 

 was performed. 



Treatment. Some 

 think to have con- 

 trolled the disease by 

 spraying thoroughly 

 with the copper sul- 

 phate solution before 

 the buds break, and 

 following this, after 

 the trees have blos- 

 somed, with applica- 

 tions of the Bordeaux 

 mixture at intervals of 

 about two weeks until 

 July first. Burning af- 

 fected leaves and giv- 

 ing good cultivation 

 may also decrease the 

 severity of the trouble. 



Leaf^Rust. See under PLUM. 



Mildew (Podosphcera Oxycanthce, De- 

 Bary). Description. Early in the sea- 

 son, before the peaches are one-half 

 grown, they are occasionally attacked by 

 a mildew which produces white, powdery 

 patches upon their surface (Fig. 68). 

 These may be very small, or they may 

 enlarge until they are fully half an inch 

 in diameter. As the season advances 

 these parts become brown and hard, some- 

 times causing the peach to crack. The 

 ldew ' foliage is also attacked by this fungus; 

 here it produces a thick covering of white mycelium which 

 entirely obscures the green color underneath. 



FIG. 67. Peach curl. 



