570 ANNUAL REPORT OF THE Off. Doc. 



also proved a remedy against borers. We used the paint a little 

 thicker than it is usually applied for second coat work, and painted 

 trees about 18 inches high. An active person could paint about 300 

 to 400 trees per day. The trees painted were apple. Have never tried 

 it on peach. Raw linseed oil should always be used. 



PROF. SURFACE.— This accords with the experience of Prof. 

 Allwood, of Virginia, who tried paint on different varieties of trees 

 with no ill effect. 



MR. HIESTER,— I gave Prof. Surface the privilege of painting 

 some of my trees and saw no ill effects. 



MR, WEIDNER, — A gentleman near me states that he has tried 

 paint on peach trees, with same result as Mr. Hiester. 



SAN JOSE SCALE. 



The following remarks and papers by Prof. Surface, Economic 

 Zoologist, and several of his office and field assistants, set forth in 

 a practical way the latest efforts and experiments that are being 

 made by the State for the suppression of this destructive pest: 



SAN JOSE SCALE. "HOW IT TRAVELS." 



By PROF. H. A. SURFACE. Economic Zoologist, Harrisbum, Pa. 



The day has passed when it is necessary for expert fruit growers, 

 meeting in a society of this kind, to discuss the subject of the best 

 remedies for the San Jose" Scale, or the possible effects of oils, 

 fumigation, or certain solutions upon either trees or pests. These 

 things are now fairly well established, and we are ready to move to 

 a higher plane and discuss such subjects as some of the details of 

 the life or rate of spread of this pest. 



A year ago a paper, presented before this association, contained 

 the statement that during the past several years the scale had not 

 spread more than a few yards. Last fall in the vicinity of the writer 

 of that paper we found he was mistaken, as we could trace its 

 spread from his premises to a distance of two or three miles or more; 

 but general statements of this kind are not as valuable as specific 

 details of what has been found by men making a careful examina- 

 tion over a country of considerable area. As a type of such work, 

 I wish to read from a written report recently sent me by Mr. Charles 

 A. Heiss, our inspector and demonstrator in Centre and Clearfield 

 counties. 



Under date of December 5th he wrote as follows. "Yesterday 

 morning I again inspected carefully the premises of Mr. G. and 



