PEACH AND NECTARINE DISEASES. 115 



like Mildew, and which is chiefly apparent on the lower 

 surface. The infected leaves die off early, and, of course, 

 the tree suffers loss by so much ; also whilst the leaves 

 last they cannot perform their proper functions. The 

 fungus also seems to spread into the branches, and to 

 again reappear on the same branch and its branchlets 

 another season. 



Rembdies. — (1) There is no remedy except to remove 

 infested leaves and burn them as soon as discovered, and 

 in very bad cases to cut off and burn the whole branch. 

 Spraying the foliage early in the season with a mixture of 

 sulphide of potassium (liver of sulphur) and water (For- 

 mula No. 23) is a good preventive. (2) Another excellent 

 remedy is to spray the tree, before the leaves appear, with 

 -Bordeaux Mixtiu-e (Formulie Nos. 20 and 21), the opera- 

 tion beintjj repeated a few weeks later. 



Shot-Hole Fungous (Cercospora circumcisa).— This 

 fungus is responsible for the formation of the shot-like 

 holes sometimes seen in the leaves of the peach, cherry, 

 etc. The disease causes circular patches in the leaf to 

 turn brown, dry, and eventually fall out, leaving holes. 

 Needless to add, this injury seriously affects the natural 

 functions of the leaves, and the result is unhealthy 

 growth. 



Remedy. — Spray with Carbonate of Copper and Am- 

 monia Solution (Formula No. 22) when the leaves begin 

 to expand, and at intervals afterwards. 



Silver. Leaf Disease. — See chapter on " Plum 

 Diseases." 



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