136 NEW YORK STATE MUSEUM 



the insecticide. Samples of the emulsion taken near the be 

 ginning, the middle and end of the spraying gave respectively 

 17$, 13.6$ and 15.6$ of oil. These samples were taken while spray- 

 ing under a reduced pressure and from both nozzles. This varia- 

 tion is greater than any recorded in previous years and may have 

 been due to the apparatus being somewhat out of order. Sunday, 

 the 6th, %inch of rain fell, and between that and the 11th, 1% 

 inches more. The weather was such that no spraying was at- 

 tempted between the initial application and the latter date. 



An examination July 7 showed that about all of the trees 

 sprayed with the emulsion were infested with from very few to 

 rather abundant young scale insects. They were found almost 

 entirely near the center of the rows. There was no evidence to 

 show that the fruit buds had been affected in the slightest by 

 the application. 



An examination Nov. 25 showed that the trees were in very 

 good condition. There were a few living scales on every one, 

 and in a few cases they might be classed as somewhat abundant, 

 but in no instance were there enough to interfere with the 

 health of the tree. The general results were very satisfactory. 

 All of the treated trees were in very thrifty condition and bore 

 immense numbers of fruit buds. 



Experiments at Warwick. About 50 old peachtrees were 

 sprayed with 20$ crude petroleum emulsion on Mar. 25, which 

 was a bright, sunshiny day, though in the afternoon there 

 was some wind. The trees in this old orchard are from 

 three to five or seven years of age, some of them being 15 

 feet high. Two rows of small, three year old peachtrees, 

 about 60 in number, on a hill, were also sprayed on the 

 same day for the special purpose of ascertaining the effect 

 of the insecticide on the fruit buds. The wind blew some, and 

 practically all of the trees were well covered with the insecticide. 

 Samples of the emulsion were taken at the beginning, middle 

 and end of the spraying in the old orchard and gave respectively 

 21$, 36$ and 32$ of oil. This variation must have been due to the 

 taking of the samples from one nozzle and under a lower pres- 

 sure than that employed in most of the spraying. Another 

 sample taken in the middle of the spraying of the two rows 

 of young trees on the hill gave but 14$ of oil. 



