186 



JOURNAL OF ECONO^IIC ENTOMOLOGY 



[Vol. 8 



aiwone has been successful with miscible oils and not injured trees, 

 I would like to hear from them. 



Mr. C. p. Gillette: I am yeiy much interested in the paper just 

 read; because the results seem almost identical with those we had in 

 Colorado, especially with the arsenical sprays. We came to the con- 

 clusion that it was almost useless to expect the ordinary fruit-grower 

 to control the leaf -roller by means of arsenical sprays. It is necessary 

 to make so many applications in order to keep the young leaves well 

 covered with poison that we seldom find the grower thorough enough to 

 get good results. For that reason, in the Canon City district, where the 

 insect had become very destructive, we insisted upon the use of the oil 

 sprays. We used ''Target brand" almost entirely, and got excellent 

 results. Where the growers failed, it was because the orchards were 

 not well treated with the oil. 



Vice-President Glenn W. Herrick: Aren't your trees generally 

 smaller than ours in New York State? 



Mr. C. p. Gillette: I think not. We sometimes gather 40 or 

 45 bushels of apples from one tree. I believe in Colorado, we have 

 one advantage over the east and the south in our dry climate; it is 

 nearly always bright and clear so that the oil evaporates quickly. 

 In a moist climate the danger of injury from the use of oils is probably 

 greater. 



President H. T. Fernald: The next paper on the program will 

 be by E. N. Cory. 



PRELIMINARY REPORT ON THE WOOLLY APHIS^ 



By E. N. Cory, College Park, Md. 



The results herein set forth, as the title indicates, are wholly pre- 

 liminary. To the author they are in no sense conclusive, but the facts 

 seem to warrant the belief that other experiments along similar lines 

 may lead to a method for the control of the wooll}^ aphis. 



Because the nursery injury was the most apparent, the control of 

 this pest was confined for a time, chiefly to nursery stock. This exper- 

 imentation was begun in 1908, and has been continued as time and 

 circumstances allowed. 



This work has never been pursued thoroughlj^ and continuously to 

 a definite conclusion because other, apparently more important, work 

 has always intervened. For the most part we have been content 



1 Schizoneura lanigera Hausm. 



