62 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 3 



22. "Blaekleaf" tobacco extract, one part to fifty of water. We 

 were surprised to find that this treatment was of very little benefit. 



23. "Orwood" tree spray, one part to twelve of water. Appar- 

 ently useless for this purpose. 



Ill 



Third series, applied late in hatching period. Desired to be 

 effective in killing all the living young. Sprayed June 21 to 23. 



24. Pratt's "Scalecide," one to fifty, using same trees as test No. 

 14. 



This treatment did very little good. A high percentage of scales 

 developed on trees sprayed twice during hatching time. 



25. Pratt's ' ' Scalecide, " one to seventy-five, using same trees as 

 test No. 15. Results same as under No. 24. 



26. Linseed oil emulsion, using one gallon raw oil to fifteen gal- 

 lons water. Seven out of the nine trees used in test No. 16 were used. 



Probably no good was done by the second spraying during the hatch- 

 ing period, as the two trees left untreated under this number showed 

 practically the same results as under No. 16. 



27. Cottonseed oil emulsion. Repetition of treatment on trees used 

 in test No. 17. 



It is not clear whether this second treatment was beneficial, as, 

 through an error, no trees were left unsprayed, as under No. 26. 



28. Kerosene emulsion, one part of stock emulsion to twelve of 

 water. Same trees used as in test No. 18. Very few, if any, were 

 killed. 



29. "Rex" lime-sulfur solution, one part to fifteen of water. Same 

 trees used as in test No. 20. There was practically no benefit from 

 this treatment. 



30. "Blackleaf " tobacco extract, one part to fifty of water. Same 

 trees used as in test No. 22. Practically no good was accomplished 

 with this treatment, as with No. 22, 



31. Linseed oil emulsion, one part to fifteen parts of water. A 

 fresh lot of trees was used in this test. 



The results under this number are doubtful, as it was later learned 

 that the trees, which were in another orchard, had been sprayed in 

 the spring with another insecticide. 



