REPORT OF THE STATE ENTOMOLOGIST I904 4OI 



Formulas 

 20 lb. of lime 



15 lb. of flowers of sulfur 



50 gal. of water; boil actively at least 30 minutes 



r 20 lb. of lime 



I It; lb. of flowers of sulfur 

 2 < 



; 4-6 lb. of caustic soda 



1 50 gal. of water 



r 20 lb. of lime 



) 11; lb. of flowers of sulfur 



10 lb. of sal soda 

 t 50 gal. of water 



(i) This wash has been prepared very successfully by us, by 

 simply slaking the lime in several pails of hot water in a kettle over 

 a fire, adding the sulfur at once and continuing the boiling actively 

 for at least 30 minutes, stirring at the outset till the lime had thor- 

 oughly slaked and the sulfur was moistened with the water, and 

 repeating the stirring occasionally to prevent the material from 

 caking on the bottom of the kettle. After 30 minutes boiling a deep 

 brick-red color should be obtained. The mixture can then be 

 dipped from the kettle and strained either through burlap or wire 

 screening (ordinary mosquito netting will do), poured into the 

 spray barrel and the necessary amount of cold water added to 

 bring the whole up to 50 gallons. Some prefer to wet the sulfur 

 with hot water before adding it, but in our experience this has been 

 unnecessary. ^ 



(2) In making this wash the lime is slaked preferably with warm 

 water, and while the reaction is in progress the sulfur, which has 

 previously been made into a thin paste, is added and thoroughly 

 mixed with the slaking lime. The caustic soda is then added and 

 water supplied as needed, the whole being stirred thoroughly. 

 After the chemical action has ceased, the mixture may be diluted 

 to the requisite amount, preferably with hot water, 



(3) This new wash may be prepared as follows: put 5 or 6 pails 

 of hot water in a wooden barrel, preferably a thick pork or oil bar- 

 rel, add the lime, quickly following that with the sulfur and sal 

 soda, and stir actively till the slaking is practically completed. 

 It may be necessary to add cold water at intervals to keep the 

 mixture from boiling over. After the rapid bubbling or boiling 

 is practically completed, cover the open barrel with burlap and 



