EXPERIMENT STATION EEPORT. 621 



A ten-gallon lot, based on Pennsylvania oil, was sent to Mr. D. D. 

 Denise, at Freehold, and lie distributed in smaller quantities to several 

 of his neighbors. The treated trees were seen by me in late May, 

 and the results were as variable as the men that did the work. Where 

 the treatment was thorough the result was good; but the bulk of the 

 application has been made in a young apple orchard, sprayed from one 

 side only. As a test of effectiveness this could not be considered at 

 all ; but incidentally it was determined that the soluble petroleum did 

 not creep or spread so well as the undiluted crude, with which the 

 balance of the orchard had been treated. The crude oil discolors the 

 surface so markedly that it was easy to see just about how the applica- 

 tion had been made and how much the oil had soaked around the limb 

 or branch. This was always considerable, and in smaller branches was 

 sometimes complete. Occasionally a limb would be ringed with the oil 

 in places, and an almost perfect record of the delinquencies of the 

 sprayers could be worked out. The marks left by the soluble oil are 

 much less conspicuous, but are traceable, and nowhere was there any- 

 tliing like the same amount of creeping just above described, though 

 there had been some spread. 



To test the oil under conditions somewhat unlike those in New 

 Jersey, I sent a lot of the Pennsylvania mixture to Mr. A. N. Brown, 

 Wyoming, Del., and saw the apple trees to which it had been applied, 

 June 16th, after the breeding had started. Although there was no 

 especial difficulty in finding live scale, and a few larvae were observed, 

 it was obvious that the results had been very good, and in August Mr. 

 Brown told me that, whereas in 1904 he had no salable apples from 

 these trees because they were so scaly, he expected this year to harvest 

 them all in good condition. Mr. Bro'wn made his application very 

 thoroughly with a gas sprayer, and the fact that the results were not 

 more complete indicate the difficulty of reaching all parts of a vigor- 

 ous, good-sized apple tree. I have no doubt that all the scales that 

 were actually reached by the oil were killed, and the survivors are 

 simply those that escaped the soaking in some way. 



Mr. S. B. Ketcham, of Pennington, received five gallons of the 

 Texas product and. applied it March 18th with very satisfactory re- 

 sults. Mr. Ketcham has had some yery unfortunate experiences with 

 the caustic qualities of lime, sulphur and salt, and expresses himself 

 as especially gratified with the ease and simplicity of preparations and 

 application. 



