REPORT OF THE STATE ENTOMOLOGIST 1902 141 



been equally good. It will require more than one season's work 

 to determine the exact status of this material in New York 

 State, and at present we can only advise its use in a provisional 

 manner. 



Experiments at Highland. A number of young plumtrees, 13 

 Abundance and 13 Burhank, were sprayed Ap. 1 with the lime, salt 

 and sulfur mixture prepared according to the formula given above. 

 Some trouble occurred in this case, because the boiler was small 

 and would not hold 10 gallons at once. It was therefore impossible 

 to add all the lime and salt and boil for half an hour. The matter 

 was further complicated by the boiler leaking after a part of the 

 lime and salt had been added and boiled perhaps for 25 minutes. 

 The whole had to be removed, placed in a barrel, the additional 

 lime and salt added, and then to that was added considerable hot 

 water, and the mixture covered and allowed to remain undis- 

 turbed perhaps an hour in the hope that the heat would com- 

 plete the chemical action. The trees sprayed with this mixture 

 were completely dry. The day was sunny and rather cool with 

 considerable wind. All of the trees were sparsely infested with 

 San Jose scale. No rain fell till the Gth, when there was a pre- 

 cipitation of % inch, and from then to the 11th an additional 

 1% inches fell. The weather was such that no spraying had 

 been possible since the first treatment. 



An examination of the sprayed trees July 7 showed that there 

 were very few living young, and that the mixture was apparent 

 on the trees only as slightly white particles, which rendered the 

 detection of the white, young scale insects very difficult. The 

 application has undoubtedly killed a large proportion of the 

 insects. Some other trees sprayed with lime, salt and sulfur, 

 said to have been prepared according to the same formula but 

 boiled only about half as long, were examined. The insecticide 

 was much more apparent on the latter, and possibly it was more 

 effective. In neither case did the mixture injure the fruit buds. 



An examination Nov. 25 showed that the experimental trees 

 were in excellent condition and, if anything, perhaps a little 

 freer from the scale than those treated under similar conditions 

 with the 20;^ mechanical petroleum emulsion. The trees above 

 the experimental row were also sprayed later with lime, salt and 

 sulfur mixture, which was boiled for a relatively short time, and 

 considerable of the mixture was still to be seen on the northeast 



