262 
REPORT OF THE DEPARTMENT OF ENTOMOLOGY OF THE 
Taste [.— Errecr of KEROSENE ON TREES, 1900. 
SmRInS I. 100° FLASH TEST (“ DISTILLATE ”’). 
Trees sprayed Jan. 22. Clear, wind brisk, temperature 50° F. 
Strength 
of oil. 
Per ct. 
15 
25 
100 


Kind of tree. 


Date of 
examination. 
April 9 
April 20 
May 23 
Oct. 12 
April 23 
June 20 
April 11 
April 20 
May 23 
Oct. 12 
April 11 
April 20 
June 20 
April 14 
April 20 
May 23 
June 20 
June 20 
April 14 
April 20 
April 23 
May 1 
June 20 
June 20 


Effect on tree. 
Slight discoloration of inner bark ‘around 
buds. : 
Apparently in good condition. 
Bark shows injury in spots. 
Tree recovered. 
Part of branches injured. 
Tree one-half dead. 
Trace of injury to inner bark around buds. 
Apparently in good condition. 
Only slight injury where bark was rough. © 
Tree alive and vigorous. 
Twigs somewhat injured. 
Tree nearly dead. 
Tree dead. 
Slight injury to inner bark around buds. 
A few buds making an effort to start. 
All buds dead and inner bark injured. 
Plate XXX. 
Tree dead. 
Tree dead and removed. 
See 
Slight injury to inner bark noticeable. 
Buds making a weak start. 
Inner bark killed around buds and in spots 
over tree. 
A few buds expanding. Bark all killed 
near ground. 
Tree dead. 
Tree dead and removed. 


