284 



SPRAYING MIXTURES 



upon trees in the spring while they are still dormant. It 

 is often used as an early spray on peaches for the leaf 

 curl, and on apples for the apple scab. The lime-sulphur 

 sprays have largely taken its place. 

 Formula : 



Copper sulphate i lb. 



Water 25-50 gal. 



Weak Copper Sulphate 

 Solution. The weak 

 copper sulphate solution 

 is used as a fungicide to 

 control the rot on stone 

 fruits when the fruit is 

 so far advanced that 

 other sprays would dis- 

 color it. As this spray 

 contains no lime, it does 

 not stick so well as Bor- 

 deaux mixture and hence 

 must be applied more 



frequently. For peaches and Japanese plums it should be 



weaker than for the other fruits. 

 Formula : 



Copper sulphate i lb. 



Water 150-300 gal. 



Self -boiled Lime-sulphur Solution. --This is a fungicide 

 used for trees having very tender foliage and is especially 

 valuable for spraying peaches and Japanese plums. 



Formula : 



Lump lime . . . 8 lb. 



Sulphur 8lb. 



Water 50 gal. 



Fig. 152. Testing samples of Bordeaux mix 

 ture by settling. The second and fifth 

 samples are best. 



