EXPERIMENT STATION EEPOET. 601 



lesslj handled. Personal experience has in many cases impressed 

 this upon men who are still using it. 



Wherever the oil hits it kills, and if treated trees have not been 

 cleaned it simply means that they have not been thoroughly 

 sprayed. The undiluted oil also shows wherever it has come into 

 contact with the bark, and where I have found live scale on apple 

 trees sprayed with this material I could see just where the oil had 

 not been applied.. This is apt to happen where the grower is 

 afraid of getting too much oil on his trees and does not spray 

 thoroughly enough. Some growers have warmed the material be- 

 fore use and claim that it is more penetrating and spreads and 

 covers better than when cold. 



Thus far I have quoted largely from Mr, Dickerson's report, 

 and the "I"' in the last paragraph is his. Personally I have seen 

 apple trees of large and medium size, so badly infested with scale 

 that they were beginning to die at tips, cut back and sprayed with 

 imdiluted oil, afterward recover and make good useful trees. 

 One case especially, in Burlington county, was brought to my 

 attention. "When I saw the orchard in the spring of 1905 I would 

 not have given a dollar for its chance of life. The trees were all 

 topped, some of them cut back to stubs, and all were bright 

 chocolate-brown and greasy. Some were starting out, but I would 

 not have been surprised to learn later that the orchard had been 

 cut out. The owner insisted, however, that the trees would come 

 out all right, and he was correct. The photograph here given 

 illustrates the condition of the trees in the summer of 1906, and 

 there was a crop of clean fruit on them. The rest of the farm was 

 cleaned up by a fall application of Scalecide, followed by lime, 

 salt and sulphur in spring. It is further suggestive that this same 

 man is constantly putting out more trees, with full recognition 

 of the fact that he will have to fight scale on them almost from 

 the start. 



Kerosene liimoid. 



Iv.-L. has not been very extensively used in N'ew Jersey, so far 

 as our observations extend, and only two cases have been actually 

 verified. In Salem county a nurseryman combines the treatment 

 of trees with the business of growing them, and charges ten cents 

 per gallon of applied mixture. Four thousand five hundred gal- 



