21)6 Report of the DEPARTMEiNT of Entomology of the 

 Table II. — Chestnut (Paragon) Treated Under Fumigatoes, 1901. 



Time treated. 



a number of its lower 

 branches dead, apparently all 

 due to injury by scale. 

 Total number treated with 15 grams 6 

 Mar. 18.. 20 .70 30 75 171 No Injury. 



Mar. 19.. 20 .70 30 90 141 No injury. 



Mar. 20. . 20 .70 30 60 4 No injury. 



Mar. 23. . 20 .70 SO 85 141 One tree exposed all night; on 



June 3, shows tips of twigs 

 without leaves and no living 

 weeds or grass around base. 

 Other trees uninjured. 

 No injury. 

 No injury. 

 No injury. 

 No injury. 



One tree exposed all night; May 

 24, has terminals killed back 

 12 to 18 inches, similar to 

 tree shown in Plate XYI. All 

 plants around base of tree 

 killed. Other trees unin- 

 jured. 



i Two trees treated Mar. 18, two Mar. 19, one Mar. 23, two Mar. 25 and one Apr. 5 were 

 exposed to gas all eight. 



