208 Report of the I^epautmeint of Entomology of the 



Table V. — rEAcn Trees Treated Under Fumigators, 1901. 



Date. 



Mar. IG. 



Amt. of KCN 

 per lOU cii. ft. 



Oiaim. 

 75 



Apr. 8. . 75 



Ozs. 

 2.64 



2.64 



Time treated. 



Mm. 

 2iin. 

 30 



30 



Max. 



3Iin. 



30 



60 



Apr. 12. . 75 2.64 30 30 



Apr. 13.. 75 2.64 30 60 



No. 



of 



trees. 



Total number treated with 75 grams 12 



Kesults. 



Tree in full bloom May 6. No 

 Injury traceable to gas. PI. 

 XV. 



One tree, not badly infested, 

 treated GO minutes without 

 Injui'y. The other tree 

 treated but 30 minutes, on 

 Apr. 2S showed bu Is on badly 

 Infested branches to be weak, 

 but on May 13 appeared in 

 good condition. 



Buds expanding when treated. 

 On May 6 trees have but few 

 branches with terminal and 

 lateral buds killed; and on 

 May 13 they show but one- 

 tenth full bloom. 



May 6, some branches on all 

 these trees show terminal 

 and lateral buds injured; one 

 tree ti-eated one hour injured 

 more than the others. (See 

 Plate XVI.) May 13, less 

 than one-tenth full bloom. 



Tajble VI. — Japan Wailnut Trees Treated Under Fumigators, 1901. 



Results. 



Tree badly infested. No In- 

 jury. 



No injury. 



No injury. 



No injury. 



No injury. 



No injury. 



No injury. 



No injury. 



No Injury. 



No injury. 



May G, all terminal buds killed. 

 June 10, tree has developed 

 latent buds and is In full leaf- 

 age, showing tendency to 

 form numerous branches but 

 no leaders. All other wal- 

 nuts uninjured. 



