164 FRUIT-GROWING 



The first of these is applied as soon as the 

 trees become dormant and the other as late in 

 winter as possible. The first will control the 

 blight and the second will prevent injury from 

 the leaf curl. Both applications, of course, will 

 kill any scale insects that may be present. 



The first summer spray should be applied 

 shortly after the trees have shed their petals in 

 the spring. It consists of the self-boiled lime 

 sulphur solution to which is added arsenate of 

 lead (dry) at the rate of one and one-half 

 pounds for each fifty gallons of spray mate- 

 rial. This application is important in the con- 

 trol of the curculio. 



The self -boiled lime sulphur is made by plac- 

 ing eight pounds of stone lime in a barrel and 

 adding enough water to start it slaking. Im- 

 mediately add eight pounds of flour sulphur and 

 begin to stir, adding more water as needed to 

 keep the slaking process vigorously at work. 

 There must be enough heat present to cause 

 some of the sulphur to combine with some of 

 the lime, producing a slight coffee brown color. 

 When this color is reached the barrel may be 

 filled with water and the entire contents, sedi- 

 ment and all, used for spraying. A little ex- 

 perience will teach any grower just how to pre- 

 pare this solution, the important point being to 

 cook it just enough but not too much. A good 

 batch should, after settling, show a clear sul- 



