I0-|8 NEW YORK STATE MUSEUM 



PLATE 6 



Views of three trees, one treated with kerosene, one with whale oil 

 soap and the other with crude petroleum. Tree 20 was very badly in- 

 fested with the scale, tree no had very little of the pest and tree 114 is 

 represented as it appeared at the beginning of the experiment. 



PLATE 7 



Tree 51 shows the comparative harmlessness of 20% kerosene, it is in 

 nearly full bloom. The leaves are starting on tree 93 but they have been 

 retarded by the crude petroleum. 



PLATE 8 



This plate shows well the difference between crude petroleum and 20% 

 kerosene. The latter is practically harmless and, as the two trees were 

 as nearly alike as possible, the plate illustrates very nicely the injury due 

 to crude petroleum. 



PLATE 9 



Tree 10 1 was very badly infested with the scale but otherwise the com- 

 parison between 20% and undiluted crude petroleum is a very just one. 



PLATE 10 



Note the killing of branches which seems to be characteristic 

 of the undiluted crude petroleum such as was used. 



PLATE II 



Shows the comparative injury due to December and February applica- 

 tions of the oil. 



PLATE 12 



Both trees are in good bloom, showing that an application of whale oil 

 soap and petroleum combined does not injure the buds. 



PLATE 13 



Fumigating tent in operation, the hood was kept extended for the pur- 

 pose of securing greater constancy in the cubic contents of the tent. 



PLATE 14 



Peach limb showing injury by fruit tree bark beetle. 



PLATE 15 



Forest tent-caterpillars on the trunk and larger limbs of an appletree 

 at East Greenbush. 



PLATE 16 



The caterpillars on the trunk of the same tree. 



