DISEASES OF THE CHERRY 1151 



ho* lies of the fungus and the organs by which the fungus hiber- 

 nates. In spring or early summer, winter spores, which were de- 

 veloped the preceding fall, are discharged and initiate the first 

 infection. Summer spores are soon developed, and new infections 

 follow. 



Good control has been obtained by the use of lime-sulphur solu- 

 tion diluted 1 to 50. The addition of three pounds of iron sul- 

 phate to ."><> gallons of the mixture is said to have a tendency to 

 reduce possible injury to the foliage and also to increase the ad- 

 hesiveness of the mixture. The first application should be made 

 as soon as the disease appears, the frequency of succeeding ap- 

 plications depending on the prevalence of the disease, which is 

 largely determined by weather conditions. Shot-hole, or leaf 

 spot, and powdery mildew may be controlled by one schedule of 

 spraying. 



Kcr brown rot and leaf spot, see discussion under plum dis- 

 eases, pages 1192 and 1195. 



