172 JOUnXAL OF ECONOMIC ENTOMOLOGY [Vol. 2 



Of the first lot, only 10 apple and 3 pcaeh were alive, and of the 

 second, 30 apple and 19 peaeh were alive and doing well. 



2. 69 apple and peaeh trees were dipped instantaneonsly, tops only, 

 in the lime-sulfur wash, at a temperature of 122 degrees Fahrenheit, 

 April 27. 1907. In addition about 100 well-grown plants of California 

 privet were dipped in the same solution. Both the trees and privet 

 were infested with the San Jose scale. 



Examination Xovember 29, 1907, showed no injury apparent and 

 no scale could be found on any of the plants. 



3. On November 29, 1907, about 200 peaeh and apple trees, 100 of 

 which were infested with San Jose scale, were dipped in five different 

 solutions, viz., home-made lime-sulfur at 100 degrees Fahrenheit, 

 Scalecide, Target brand emulsion. Soluble Oil and Kiloscale, the oils 

 being diluted 1 to 15. Part of the trees were dipped roots and stems, 

 and stems alone, in each solution, also scaly trees were dipped in each 

 wash. 



Examination of the trees during the past summer and finally Oc- 

 tober 16, 1908, showed no trees to have been injured in any way by 

 any of the solutions and further no scale could be found on any of 

 the trees. 



4. The above experiment was duplicated as far as possible this past 

 spring, the trees being dipped in the same solutions, except that San- 

 U-Zay was substituted for Kiloscale, April 14 and 16, 1908. 



Examination of these trees during the past summer and finally Oc- 

 tober 15, 1908, showed more or less injury by the various oil solutions, 

 but this is no doubt due to the fact that all the trees used in the ex- 

 periment were just beginning to leaf at the time of dipping. All the 

 trees dipped in the lime-sulfur wash lived and seemed not to be hurt 

 by the solution, while all the trees in two tests dipped in San-U-Zay 

 died. All the trees in the check lived and were thrifty. Further, no 

 scale could be found on any of the trees that were infested before 

 dipping at the final examination. 



Conclusions 



The experiments of 1906 showed that dipping dormant nursery trees, 

 either roots and stems, or stems alone, in the lime-sulfur wash, at a 

 temperature from 122 degrees to 172 degrees Fahrenheit, maj" be ex- 

 pected to be attended by severe injury to the trees. 



In the 1907 and 1908 experiments no difference could be detected 

 from the appearance of the trees dipped, roots and stems, or stems 

 only, in the lime-sulfur, at a temperature of 100 degrees Fahrenheit 

 and in the various oil mixtures at the strength of 1 to 15. However, 



