774 NEW YORK STATE MUSEUM 



The record is about on a par with that of the stronger solution 

 of whale oil soap. The scale has been held in check in most 

 instances, but there is no approach to exterminative work, 

 such as is effected by the mechanical emulsions of crude 

 petroleum. There are comparatively few extenuating circum- 

 stances, since only five trees in this large lot were abundantly 

 infested with the scale in the fall of 1900, and, as this condition 

 was due to recent development, the bark of these trees was hardly 

 rough enough to insure much protection to the scales. 



Good's ivhale oil soap no. 3, 2 pounds to the gallon. This solution 

 was tried on 15 trees. They are as follows. Trees 12-14, 57-59 

 and 08-100 are seckel pear; trees 31-33 and 70-78 are globe 

 peacli. Their condition about the close of the growing season, 

 Bep. 7, 1900, was as follows. There were very few or no young 

 scale insects on trees 57 and 78, very few on trees 76, 77 and 98, 

 few on trees 31. 99 and 100; they were rather abundant on trees 

 58 and 59, abundant on trees 32 and 33, and extremely abundant 

 on trees 12-14. 



May 22, tree 100 had set considerable fruit; trees 31, 32 and 

 77 were injured somewhat by winterkilling, the tips of many of 

 the smaller limbs being dead; tree 76 was also badly affected in 

 this manner. 



July 6, there were very few or no young scale insects on trees 

 31, 32, 57, 76, 77. 78, 98 and 100, few on trees 33, 59 and 99, and 

 rather few on tree 58; they were rather abundant on tree 14, 

 abundant on tree 12, and very abundant on tree 13. The bark 

 of both trees 58 and 59 is quite rough. 



Aug. 9, there are very few or no young on trees 31, 32, 33, 57, 

 76. 77, 78, 98 and 100, and few on tree 59; they were rather abun- 

 dant on trees 13, 14, 58 and 99, and abundant on tree 12. 



Sep. 25, there were few or no living scale insects on trees 57, 

 '98 and 100, few on trees 76 and 78; they were rather abundant 

 on trees 31, 32, 33, 58, 59 and 99, abundant on trees 13, 14 and 

 "77, and very abundant on tree 12. 



Th<i record given above is not very bright, particularly when 

 T\^e remember that in this lot there were no very badly infested 



