332 



JOURNAL OF ECONOMIC ENTOMOLOGY 



[Vol. 14 



This solution was applied by means of a small compressed air hand 

 sprayer. A bordeaux nozzle was used, adjusted to throw a solid stream 

 of considerable force. The solution was applied to the bases of the 

 trees, from the soil surface to a height of approximately eighteen in- 

 ches and some of the solution was puddled about the base of the tree. 

 The following tables show the series of applications made, and the re- 

 sults. 



Tj^ble II - Sodium Arsenate - Miscible Oil Applications 

 State Hospital Farm, Salem, Oregon, 1920 



Treatments 



Results 



Row No. of Trees Trees Date Trees Number 



No. appli- Dates of applications treated wormed wormed Infested of Worms 



cations No. % To- aver- 



tal age 

 per 

 tree 



Dl .5 Julv July Aug. Sept. Sept. 16 



1 21 26 15 .30 



D2 

 D3 



D4 



5 Oct. 14 4 80 10 2 



1920 



Ji Iv Aug. Sept. 

 21 26 15 



Aug. Sept. 

 26 15 



16 



Sept. Oct. 16 

 15 9 



4 80 6 1.2 



3 60 4 0.8 



5 100 16 3.2 



Tabie III - SoDiLTM Arsenate - Miscikle Oil Applic.\tions 

 Busenbark Orchard. Roseburg, Oregon, 1920 



Treatments 



Results 



Row No. of Dates of applications Trees Trees Date Trees Number 



No. appli- treated wormed wormed Infested of worms 



cations No. % To- aver- 



tal age 

 per 

 tree 



Dl 4 June Julv Aug. Sept. 



28 16 11 4 



20 



5 Oct. 24 2 40 2 0.4 



1920 



D6 2 June 



28 



Aug. 

 11 



20 



1 20 1 0.2 



Check no treatment 



3 60 5 1.0 



These results show that the treatment has failed to reduce infesta- 

 tion to a satisfactory extent. 



