104 JOURNAL OF ECONOMIC ENTOMOLOGY [Vol. 8 



their impenetrable character under field conditions. Photographs of 

 the protector were exhibited. 



Mr. E. B. Blakeslee: Mr. Scott has secured very good results 

 with a device which is essentially the same as the one described. 



A Member: I would like to inquire if in these experiments any- 

 thing like cement was used which would harden in the soil? 



Mr. E. B. Blakeslee: We have not used cement or gas-tar mix- 

 tures for fear of injuring the trees. I do not think the cement would 

 give good results. 



A Member: Some years ago we tried a series of experiments to 

 test mechanical protectors of various sorts as a remedy for the peach 

 borer. Those that we tried usually caused considerable injury to the 

 trees. 



Mr. E. G. Titus: In Utah, we find that peach borers attack the 

 trunks and branches as well as the crown of the tree. This makes it 

 difficult to use a mechanical protector. 



Mr. Wilmon Newell: To me this is a very interesting paper. I 

 think a glance at these photographs will convince any entomologist 

 that the right principle is being correctly applied. We were working 

 on this same insect in Texas a couple of years ago and tried to make 

 application of the same principle. We even went so far as to make 

 paper protectors but were not successful in sealing them to the trunks 

 of the trees. 



I am familiar with the work done along this line by Mr. Scott the 

 past summer, and mentioned by Mr. Blakeslee. I happen to know 

 that Mr. Scott's protectors, very similar to these but made in a differ- 

 ent way, were placed on the trees early in the season. The results 

 were such as to convince me that a method of control for one of our 

 worst fruit tree pests has been developed. We should not let this 

 matter pass without getting all the information we can and I would 

 like to ask if Mr. Scott will give us the results of his work along this 

 line. 



Mr. W. M. Scott: I was not aware that this subject would come 

 up for discussion and therefore did not come prepared with notes on 

 the results of my experiments, except such as I happen to have in this 

 little pocket note-book. 



I began experiments for the control of the peach tree borer while 

 State Entomologist of Georgia, about 15 years ago, and have since 

 continued to work on this problem as a peach grower. After trying 

 numerous washes I concluded, as did Mr. Blakeslee, that this was not 

 the right method of procedure. The habit of the newly hatched larvae 

 to crawl down the trunk of the tree and enter the moist tender bark 

 below the surface of the soil furnished the clue to the solution of the 



