Peach Scab 167 



The spread of the disease is materially assisted by the 

 plum curculio, which punctures the skin of the fruit and 

 admits the fungus spores. Until recently this disease has 

 been controlled only with difficulty, but investigations 

 of the past three years demonstrate that by spraying with 

 self-boiled lime-sulphur containing 2 pounds of lead arsen- 

 ate to 50 gallons of the mixture, the disease can be held 

 well in check. This spray should be applied about three 

 times, first application at just about the time the "shucks" 

 are falling from the newly set fruit; two other applications 

 may be needed at intervals of about two weeks. It is im- 

 portant that the arsenate of lead be added, as it holds the 

 curculio in check and seems also to add to the fungicidal 

 value of the lime-sulphur. 



Frosty Mildew 



This disease causes a mouldy appearance on the under 

 surface of the foliage of the peach. It is most common in 

 the Atlantic Coast States, but is not a serious trouble and 

 can be controlled by early spraying. 



Leaf Curl 



Leaf curl is a disease which is more or less common in 

 all sections where peaches are grown. It is most trouble- 

 some in spring when the weather is cold and damp. It is 

 due to a fungus which causes the leaves to curl and become 

 badly deformed, finally dropping from the tree. The twigs 

 and even the flowers may be attacked. Thorough spraying 

 with bordeaux mixture in late winter or early spring, just 

 before growth begins, will keep this disease in perfect 

 control. 



Peach Scab 



This disease is widespread throughout the peach pro- 

 ducing areas of the eastern portion of the country, where 

 it occurs to a damaging extent on practically all varieties 

 of peaches, and particularly those with white flesh. Its 

 commonest appearance is a black velvety patch on one 

 side of the peach, or it may occur in many small circular 



