THE PEACH-TREE BARKBEETLE. 103 



2fo. 2^.— Used 24 trees of experimeut 23. Same treatment, plus barnyard 

 manure spread in 7-foot circle about each tree. 



Application made April 22, ]00S. 



T^/q. 25, — Used 24 trees of experiment 23, plus conunorcial fertilizer spread in 

 7-foot circle about each tree. 



Applied April 22, 1908: fertilizer applied May 7, IDOs. 



jV^o. 26. — One gallon chloronaptholeum, emulsified with 4 pounds of soap (dis- 

 solved in 4 gallons of water) ; then added water enou^i^h to dilute to 2.") jjrallons. 

 Sprayed 120 trees. 



First application, April 22. 190S; second application, July 7, 1908. 



No. 27. — Used 24 trees of experiment 2C! ; juhh'd barnyard manure, spreadinu 

 it in a 7-foot circle about each tree. 



First application, April 22. 1008; second application, .July 7. 1908. 



No. 28.— Used 24 trees of experiment 20, adding- eonnnercial fertilizer, 4 

 pounds to each tree, spreading it in a 7-foot circle. 



First application, April 22. 1908; fertilizer added May 7, 1908; second applica- 

 tion, July 7, 1908 (3 pounds fertilizer added). 



No. 29. — One gallon chloronaptholeum mixed with 22 pounds flour to emnl^ 

 sify, added to 30 gallons water, and put on 120 trees with spray pump. 



First application. April 17, 1908; second application. July 13, 1908. 



No. 30. — Used 24 trees of experiment 29; ndtlcd barnvMrd manuro to get 

 value of fertilizer. 



First application. April 17, 190S: second appli(;ation. July 13, 1908. 



No. 31. — Used 24 trees of experiment 29, adding commercial fertilizer, 4 

 pounds, to each tree. 



First application, April 17, 1908; fertilizer added May 7, 1908; second ap- 

 plication, July 1.3, 1908. 



No. 32. — Six pounds arsenate of lead to 50 gallons water; 3 pounds lime 

 added to neutralize the free arsenic. Put on heavy spray; pruned trees before 

 spraying; 170 trees sjiriiyed. 



First application, Api'il 20, lOOS; second application, July V.\. 19(»s. 



No. 33. — Roiled linve and sulphur spray (l.'j pounds lime. l."i pounds sul|iliur, 

 50 gallons water). Excessive application made to 200 trees. 



First application, April 24, 1908; second application, July 13, 1908. 



No. ,3'/.— Self-boiled lime-suliihur wash (15 pounds lime. 10 pounds sulphur, 

 50 gallons water). Water added slowly so as to prevent burning, stirring 

 vigorously during the jirocess. Si»rayed .300 trees. 



First ai)plication. May 18. 1908; second application. July 13. 1908, to trunks 

 and larger limbs. 



No. 35. — A stock solution of kerosene emulsion, 2(i per cent strength, was 

 made and to each gallon of stock solution 2^ gallons rain water were added. 

 Applied with spray pump. 



Application made .\i»ril 20. 1908. 



A'O. .'iG.— Fumigated trees with hydrocyanic-acid gas for one hour, first 

 scr.-iping off all gum and rough bark. Treatment given August 24, 1908. 



Yo. 37. — Tree tanglefoot. I'ut bands around 12 trees and then covered 

 bauds with tanglefoot. Application made A[>ril 2.", 1908. 



2Vo. ,38. — Renovation block. Pruned back severely al)out 100 trees (girdling 

 4 trees for traps and not treating them further) ; applied fertilizer twice and 

 kept trees cultivated all summer. 



First application, April 19, 1908; fertilizer added May 7. 1908 (4 pounds per 

 tree). Second application, July 3, 1908 (3 pounds fertilizer added). 



