394 NEW YORK STATE MUSEUM 



and the only difference observed between the two was a sHghtly 

 lighter color as compared with wash i. This wash was applied 

 only to the lower end of rows 25 and 26. 



July 22 no living scale insects Vv^ere detected and the trees were 

 vigorous and healthy. Sep. 23 very few living scale insects were 

 observed; the treatment was fairly satisfactory. 

 ;' Wash 4 composed of 25 pounds of lime and 12 pounds of sulfur 

 to 50 gallons of water, was prepared in the same manner as wash 2, 

 the boiling being continued an hour and a half. The only differ- 

 ence noticed was a slightly increased color. This mixture was 

 applied to the lower ends of rows 27 and 28. 



July 22 no living scale insects were found and the conditions 

 were practically the same as those observed in the case of wash 3. 

 Sep. 23 there were very few living scale insects, otherwise the 

 treatment was fairly satisfactory. 



Wash 5 composed of 30 pounds of lime, 15 pounds of sulfur 

 and 4 pounds of caustic soda, was prepared by bringing 5 or 6 

 pails of water nearly to a boil. It was placed in a barrel, the lime 

 added, followed at once by the caustic soda and sulfur in the order 

 named. It was then thoroughly agitated with a hoe till chemical 

 action had ceased sufficiently to permit of the barrel being cov- 

 ered with burlap. The reaction started slowly, at no time was it 

 very violent, and less than two quarts of water was sufficient to 

 keep it from overflowing. It was necessary to strain this com- 

 pound twice before it could be sprayed, on account of the large 

 amount of sediment. The color changed from orange to orange- 

 red and the liquid after settling was an orange-red color; then 

 came a sediment a little lighter than pea-green and at the bottom 

 a deeper shade. This mixture, after stirring, appeared a brownish 

 red color. The sediment was very gummy or sticky. This wash 

 was applied Ap. 18, to rows 21 and 22. 



July 22 no living scale insects were observed and the trees were 

 vigorous and healthy. On Sep. 23 it was seen that this wash was 

 very nearly the same as wash 8, there being a very small amount 

 of living scale insects on the trees. 



Wash 6 composed of 30 pounds of lime, 15 pounds of sulfur 

 and 4 pounds of caustic soda, was practically a repetition of wash 

 5, except that it was boiled one hour, resulting in a little darker 

 color. This mixture was applied Ap. 18 to rows 29 and 30. 



July 22 no living scale insects were found on these rows and the 

 conditions were practically the same as with washes 3 and 4. The 

 trees appeared to be in excellent condition. Sep. 23 a very few 



