404 REPORT OF STATE BOARD OF HORTICULTURE. 



A common grade of kerosene, which is good enough for this work, can be 

 bought in most localities at eight cents per gallon, by the barrel, and the 

 soap used can be made for one cent a pound. This would make the batch 

 given above gost eight and one-half cents, and diluted with twenty-five gal- 

 lons of the water to one of the emulsion would make thirty-eight and one- 

 half gallons of wash. At this I'ate one hundred gallons will cost twenty 

 cents. 



■ FORMULA FOR FISH-OIIi SOAl'. 



Hirsch's Crystal rotash Lye 1 pound 



Fish-oil 3 pints 



Soft water 2 gallons 



The lye is dissolved in the water, and when brought to the boiling point 

 the oil is added. The batch should be cooked about two hours. When done 

 it should be filled up to make up for the evaporation by boiling, and there 

 will be about twenty-five pounds as a result of the formula. When cold it 

 can be cut and handled in cakes. 



The fish-oil will cost about thirty-six cents per gallon in New York City, 

 the lye nine cents per pound. This batch of twenty-five pounds thus costs a 

 little under one cent per pound. A strong suds made at the rate of one 

 pound of this soap to eight gallons of v/ater will be found a uniforinly safe 

 and satisfactory wash to use, killing the lice and not harming the vines. 

 After standing three days, however, the suds will lose its efficacy. 

 P S. — In Oregon the general spray used is Quassia chips. 



FORMULA. 



Quassia chips 8 pounds 



Whale-oil soap <> pounds 



Water 100 gallons 



All boiled together. 



The[^Quassia chips should be fresh, and the whale-oil soap of not less than 

 eighty per cent, strength. Spray as soon as aphis appear and continue as 

 late as practicable. 



