THE PEACH-TREE BARKBEETLE. 103 
No. 24.—Used 24 trees of experiment 23. Same treatment, plus barnyard 
manure spread in 7-foot circle about each tree. 
Application made April 22, 1908. 
No. 25.—Used 24 trees of experiment 23, plus commercial fertilizer spread in 
7-foot circle about each tree. 
Applied April 22, 1908; fertilizer applied May 7, 1908. 
No. 26.—One gallon chloronaptholeum, emulsified with 4 pounds of soap (dis- 
solved in 4 gallons of water) ; then added water enough to dilute to 25 gallons. 
Sprayed 120 trees. 
First application, April 22, 1908; second application, July 7, 1908. 
No. 27.—Used 24 trees of experiment 26; added barnyard manure, spreading 
it in a 7-foot circle about each tree. 
First application, April 22, 1908; second application, July 7, 1908. 
No. 28.—Used 24 trees of experiment 26, adding commercial 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 fertilfzer added). 
No. 29.—One gallon chloronaptholeum mixed with 22 pounds flour to emul- 
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: added barnyard manure to get 
value of fertilizer. ; 
First application, April 17, 1908; second application, 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 13, 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 sprayed. : 
First application, April 20, 1908; second application, July 13, 1908. 
No. 33.—Boiled lime and sulphur spray (15 pounds lime, 15 pounds sulphur, 
50 gallons water). Excessive application made to 200 trees. 
First application, April 24, 1908; second application, July 13, 1908. 
No. 34.—Self-boiled lime-sulphur wash (15 pounds lime, 10 pounds sulphur, 
50 gallons water). Water added slowly so as to prevent burning, stirring 
vigorously during the process. Sprayed 300 trees. 
First application, May 18, 1908; second application, July 15, 1908, to trunks 
and larger limbs. 
No. 35.—A stock solution of kerosene emulsion, 20 per cent strength, was 
made and to each gallon of stock solution 24 gallons rain water were added. 
Applied with spray pump. 
Application made April 20, 1908. 
No. 36.—Fumigated 6 trees with hydrocyanic-acid gas for one hour, first 
scraping off all gum and rough bark. Treatment given August 24, 1908. 
No. 37.—Tree tanglefoot. Put bands around 12 trees and then covered 
bands with tanglefoot. Application made April 25, 1908. 
No. 38.—Renovation block. Pruned back severely about 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 (38 pounds fertilizer added). 
