SPRAYING 265 



Lime-sulfur spray is most commonly used. It is usu- 

 ally made about as follows: 



Quicklime 15 pounds 



Flowers of sulfur 15 pounds 



Water 45 gallons 



The sulfur and lime are boiled in a part of the water 

 for about one hour. The remainder of the water is then 

 added and the spray is ready for use. 



The lime-sulfur spray is also a good fungicide. It 

 will control peach-leaf curl, and will take the place of Bor- 

 deaux mixture when this is needed on dormant trees. 



Numerous preparations of soluble oils are also on the 

 market. Many of these are good. Clear oil is not often 

 used, as it is likely to injure the trees. The soluble oils 

 are diluted with water, so as to avoid this danger. 



Kerosene emulsion is used for killing plant lice when 

 the trees are in foliage, and is also used on dormant trees. 

 To make it, use: 



Kerosene 2 gallons 



Soap ^-pound 



Water 1 gallon 



Dissolve the soap in hot water, add the kerosene and 

 churn thoroughly until a creamy emulsion is formed. 

 For use on dormant trees, dilute with 10 to 20 gallons of 

 water. For killing plant lice on foliage, dilute with 40 to 60 

 gallons of water. 



241. Combined Insecticides and Fungicides. The in- 

 secticides and fungicides may often be combined. In 

 most cases, it pays to put Paris green or other poison with 

 Bordeaux mixture, as in spraying apples, pears, potatoes, 

 etc. But this combination must not be expected to kill 



