398 NEW YORK STATE MUSEUM 



Wash 17 composed of 25 pounds of lime, 20 pounds of sulfur and 

 18 pounds of soda carbonate to 50 gallons of water, was prepared as 

 follows : about 5 pails of water were brought to a boil and placed in 

 a wooden barrel, and the lime, soda carbonate and sulfur added in 

 the order named. The action was more violent than in the case 

 of wash 16, and it was necessary to add cold water to the mixture 

 three or four times in order to prevent overflowing. There was 

 also a little more sediment and the color was darker, being a dark 

 orange-red. This wash was applied Ap. 13 to rows 6 and 7, and a 

 second treatment was given on the 15th on account of the windy 

 weather the preceding day. On making up the wash a second 

 time boiling hot water was employed as before and thorough stir- 

 ring resulted in onl}^ a teacupful of sediment being left. It was 

 allowed to stand in the barrel 45 minutes. 



An examination July 2 2 resulted in finding no living scale on the 

 trees and the presence of the wash was still evident. Sep. 23 no 

 living scale was detected on the foliage and very little was found 

 on the trees, indicating that the treatment had been very satis- 

 factory. 



Wash 18 composed of i pound of lime, i pound of soda carbonate 

 to each 4 gallons of water, was prepared by adding the lime to a 

 small amount of boiling water and then the carbonate of soda ; 

 stirring was continued till chemical action was completed. There 

 was practically no sediment and the liquid possessed striking caus- 

 tic properties, though it did not burn like wash i. This prepara- 

 tion was applied Ap. 18 to the five uppermost trees on rows 14 

 and 15, and also to eight of the uppermost trees on rows 16 and 17. 

 July 22 it was found that there were a large number of living 

 scale insects on these trees and breeding was quite apparent. Sep. 

 23 the condition of these trees was a very little better than the 

 check row. 



Observations. It will be seen by reference to the above records, 

 that practically all of the lime-sulfur combinations reported on, 

 .were successful. In fact it was very difficult to detect any mate- 

 rial difference between the various washes, and we are confident 

 that a relative wide range in the proportions of the various sub- 

 stances is permissible, though undoubtedly one formula will gradu- 

 ally come^into use on account of its efficiency and because of various 

 economic considerations. We have decided, after a comparison 

 of experiments and consultation with Prof. P. J. Parrott of the 

 State Experiment Station at Geneva, to recommend a formula 

 calling for 20 pounds of lime, 15 pounds of sulfur, no salt and at 



