PREPARATION OF THE SULPHUR SPRAYS. 155 



billing sulphur with lime. Salt has also been used in connectioii with 

 these sprays in several formulie. 



In the following tal)le are shown the various formulae for sulphur 

 spravs which luive been tested for the control of peach loaf curl. All 

 forniuhe are for 45 gallons of water, except where otherwise stated. 



Tabi-e 42. — Sulphur sprays applied for the control of peach leaf curl. 



* 15 pounds sulphur, 30 pounds lime, 10 pounds salt, 60 gallons water. 

 *10 pounds sulphur, 20 pounds lime, 10 pounds salt, 60 gallons water. 

 1 15 pounds sulphur, 30 pounds lime, 10 pounds salt. 



* 10 pounds sulphur, 20 pounds lime, 10 pounils siilt. 

 1 10 pounds sulphur, 20 pounds lime, 5 pounds siilt. 

 *5 pounds sulphur, 10 pjunds lime, 5 pounds salt. 



1 5 pounds sulphur, 10 i)Ounds lime, 3 pounds salt. 



1 15 pounds sulphur, 30 pounds lime. 



1 10 pounds sulphur, 20 pounds lime. 



1 10 pounds sulphur, 8 pounds lime. 



t6 pounds sulphur, 4 pounds lime. 



t5 pounds sulphur, 15 pounds lime. 



1 5 poxmds sulphur, 10 pomids lime. 



t5 pounds sulphur, 5 pounds lime. 



* Recommended by the writer, but tested by the growers. 



t Prepared and tested by the writer, and in numerous cases also tested by growers. 



It takes longer and is more difficult to prepare the sulphur than the 

 copper sprays; but where the sulphur may be obtained at liberal whole- 

 sale rates the expense of the two classes does not vary greath^ For 

 facts respecting the sources of sulphur, etc. , the reader is referred to 

 page 190. 



The sulphur sprays are prepared by boiling the ingredients (sul- 

 phur, lime, and salt, or sulphur and lime) in water for not less than 

 two hours. So far as the writer's experiments are concerned, there 

 has resulted no apparent advantage in the treatment of curl by the 

 addition of salt to these sprays. The usual method which growers 

 having small orchards follow in preparing sulphur sprays is to slake 

 one-third to one-half of the lime required, in the vessel in which the 

 boiling is to be done. When slaked to a thin cream the sulphur is 

 stirred in, all lumps of sulphur having been first pulverized. Boiling 

 water is noM^ added to make one-half to two-thirds the amount required 

 by the formula. This mixture is boiled for not less than one and one- 

 half hours, only boiling water being added if it becomes necessary" to 

 reduce the mixture. If the boiling is done in a kettle or iron pan, great 

 care is necessary to prevent the caking and burning of the materials. 

 When the mixture has boiled for the time stated or longer, the remainder 

 of the lime is slaked and the salt is added to it and well stirred in. This 

 lime and salt mixture is now added to that which has been boiled and the 

 boiling is continued for at least one-half hour longer. The boiled 



