June, 'OS] JOUUNAL OF ECONOMIC ENTOMOLOGY 189 



sulphur wash in winter — have not given very good results where tried 

 by the Station. 



A rather extensive test against the peach borer was tried in a young 

 orchard, but partiallj^ failed to yield results because of the scarcity 

 of borers, even on the check trees, and of course full returns cannot 

 be had until spring. I decided, however, that the use of building 

 paper, or other protectors of like character around the trees for a 

 period sufficiently long to be of effectual use in preventing egg-laying, 

 was more undesirable than injury by the borers, while various sticky 

 and poisonous mixtures were of questionable utility. INIounding with 

 earth seemed among the best remedies, but by all odds the most satis- 

 factory treatment from the standpoint of the trees and borers com- 

 bined, was tying tobacco stems loosely about the base of the trunk, 

 and suspending them from a point about twelve or fifteen inches 

 above the ground. Prof. Slingerland gave a very good report of this 

 treatment several years ago, but did not specially emphasize the splen- 

 did tonic effect it exercises on the trees. This treatment seemed to 

 more than pay for itself without any reference to the presence of 

 borers, while at the same time it possessed good value in this respect. 



In 1906 I took advantage of the proffered services of Mr. C. F. 

 Harbison of Dayton. 0., to conduct a cooperative experiment against 

 the elm leaf-beetle. Acting under my instructions, Mr. Harbison 

 banded some elm trees in early June with Thum's Tree Tanglefoot to 

 prevent the larvip reaching the ground when descending to pupate. 

 Immediately above this sticky band was arranged a burlap l)and, be- 

 neath which the insects could shelter and pupate. The first count of 

 the catch was made June 17. and showed 200 insects in the Tanglefoot 

 band, 124 beneath the burlap and 72, which had been dislodged, at the 

 base of the tree and were unable to re-ascend. This made 396 in total. 



A second examination made June 21, collected -117 ; a third. 599, 

 and a fourth, 422, making 1,834 beetles, pupffi and larva? taken from 

 one tree. 



About July 24tli, eight trees were banded and the totals taken dur- 

 ing the four examinations amounted to 16.122 insects in various stages, 

 mostly larva? and pupa.\ The number under the burlap band that had 

 pupated kept constantly increasing at each examination, indicating 

 the importance of the burlap in connection with the Tanglefoot. The 

 same experiment was repeated the past year and Mr. Harbison re- 

 ports a collection of 4.938 insects from three trees on the 9th of 

 August ; again, on August 13th, 8,491 insects from four trees ; and on 

 August 22d, 4,653 insects from three trees, making 18,082 insects from 

 ten trees. I do not understand from the report whether the bands 



