•^^6 Report of the Entomologists of the 



ring in the acid, and letting it stand over night, or longer; then 

 add eight gallons of cold soft water, and stir. We have then ten 

 gallons of the liquid ready for use. The wash should be thor- 

 oughly applied with a swab or brush around the base of each 

 tree, taking pains to have it enter all crevices." The formula for 

 the wash recommended by Mr. J. H. Hale, the well-known Con- 

 necticut peach-grower, is given by Dr. Lintner as follows: " To 

 a common bucket full of water take two quarts of strong soft 

 soap, half a pint of crude carbolic acid, two ounces of Paris green, 

 lirst reduced to a paste, with water and lime enough to form 

 a thin paste that will adhere to the tree. A little clay may be 

 added to assist in making it stick. Apply with a swab or brush 

 before the first of June." A compound which is intended to serve 

 {he same purpose as the above is known as " Dendrolene," and 

 is manufactured by the Bowker Fertilizer Company, of Boston, 

 Mass. An account of the experinients with Dendrolene at this 

 Station will be found in another part of this report. 



Washes intended to poison the young borers have lately come 

 into use. A simple and effective wash of this character consists 

 of a heavy whitewash, to which is added a little glue or soft soap, 

 together with two or three ounces of Paris green or London pur- 

 ple to a pailful of the whitewash. 



Remedial measures. — The chief remedial measures consist of cut- 

 ting out and killing the borers or inserting a probe into their 

 burrows, which will accomplish the same end. Probably the 

 former is more frequently resorted to. The principal objections 

 to this method are the necessary injury to the tree and the time 

 required to do the work. Bisulphide of carbon may be effectively 

 used by pouring into the channels made by the borers. This 

 compound evaporates very rapidly and the fumes, which are fatal 

 to the insects, being heavier than air, will reach all parts of the 

 infested portions of the tree. To apply the bisulphide of carbon, 

 remove the sap and dirt from the opening into the root and in 

 ject a little of the bisulphide, covering the root again as soon as 

 the application is made. 



