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JOURNAL OF ECONOMIC ENTOMOLOGY 
[Vol. 16 
complications come up that affect the problem in such a way that the 
results we have been getting heretofore will not hold. 
Mr. William Moore: I would like to raise the question as to the 
nature of lime sulphur. Manufacturers have been making progress in 
the development of lime sulphur and other insecticides. Have they 
made any changes? Is it exactly the same today as it was two years 
ago ? Changes in manufacture might make a difference. 
Mr. W. P. Flint: I did not make it clear in my talk that in the three 
experiments that I mentioned, two different brands of commercial lime 
sulphur were used and two lots of home-cooked or steam-cooked lime 
sulphur. 
Mr. L. Haseman : We have been having somewhat the same condition 
in Missouri naturally, and the same conditions extend into northern 
Arkansas. During the summer and fall we held a number of scale 
meetings in the southern portion of the state and I had an opportunity of 
talking with Mr. Ackerman regarding his experience. We have not 
been losing the orchards in Missouri that they have been losing in 
Arkansas and in Illinois. Our better orchard men have been spraying 
thoroughly and all who sprayed thoroughly up to two years ago, have 
not lost any orchards. However, the men who have not been spraying 
thoroughly in the last five years have lost orchards in the last two years. 
So I believe Mr. Flint is right when he says that the scale in some 
orchards had an opportunity of getting so thoroughly established, and so 
abundant, that with the mild winters, which we have been having, we 
have not been killing enough of them to keep them under control. 
We have had some similar experience with lime sulphur solution, 
though not as high a percentage of living scale went through our test. 
Two per cent living scale was the highest we had in our tests in the central 
part of Missouri. 
Mr. O. I. Snapp: We should not lose sight of the fact that in some 
sections, the effect of San Jose infestation may be attributed to the 
vast amount of proprietary insecticides being used. The San Jose 
infestations in Georgia are becoming alarming and we are much in¬ 
terested in this oil emulsion spray. We used it this year in an experi¬ 
mental way but we have not gotten any information as to its having 
been used on peaches. From a two per cent solution it is thought that 
twig injury might come. 
President J. G. Sanders: Is that oil a cutting oil? 
Mr. William Moore: I talked with the manufacturer but he was 
loath to say much about it. It is an oil which actually forms an emulsion 
