466 INJURIOUS AND BENEFICIAL INSECTS OF CALIFORNIA. 



Formerly lime-sulphur spray whs a home-made product, but today 

 the commercially prepared product is so much more convenient than 

 the home-made mixtures and as good as the best that can be made 

 on the farm that the use of the latter has almost ceased. 



HOME-MADE LIME-SULPHUR 

 Formula 



Stone lime 50 pounds 



Sulphur, flowers of 110 pounds 



Water to make 50 gallons 



Preparation. — Heat in a cooking barrel or vessel about one third 

 of the total quantity of water required. When the water is hot, add 

 all of the lime, and at once add all the sulphur, which should pre- 

 viously have been made into a thick paste with water. After the 

 lime is slaked, another third of the water should be added, preferably 

 hot, and the cooking should be continued for an hour, when the 

 final dilution may be made, using either hot or cold water as is most 

 convenient. The boiling due to the slaking of lime thoroughly mixes 

 the ingredients at the start, but subsequent stirring is necessary if 

 the wash is cooked by direct heat in kettles. After the wash has 

 been prepared it must be strained through a fine sieve as it is being- 

 run into the spray tank. The resultant product is a concentrated 

 solution of lime-sulphur, which should be diluted for use as directed 

 in the table for diluting the commercial lime-sulphur. 



