REPORT OF THE STATE ENTOMOLOGIST 1901 771 



with this compound. They are as follows: trees 18 and 63 are 

 an early unnamed pear; trees 19, 64, 65, 104 and 105 are Bart- 

 ietts; tree 103 is an Idaho pear; trees 36, 37, 81 and 82 are globe 

 peach. The condition of these trees near the end of the grow- 

 ing season, Sep. 7, 1900, was as follows: there were very few 

 or no young scale insects on trees 18, 19, 82 and 104, very few 

 on trees 63, 81 and 105, few on tree 103; they were abundant on 

 tree 36, and very abundant on trees 37, 64 and 65. 



May 22 it was seen that many of the tips of the smaller limbs 

 on tree 37 had been winterkilled, and that tree 82 had suffered 

 in this way to some extent. 



July 3, there were very few or no young scale insects on trees 



36, 81, 82, 103, 104 and 105, few on trees 18, 19, 37, 63 and 65; 

 and they were rather abundant on tree 64, which has a rough 

 bark. 



Aug. 9, there were few or no young on trees 18, 36, 37, 63, 81, 

 82, 103 and 104, few on trees 19, 64 and 105, and they were 

 rather few on tree 65. 



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

 trees 63, 64, 65, 81, 104 and 105, very few on trees 18, 19 and 103, 

 and but few on trees 36, 37 and 82. 



The record for this substance is very good. Three of the trees 

 having very few living scale insects on them at the end of the 

 season were on the edges of the experimental orchard, where 

 they could easily have become reinfested. Living scale insects 

 were abundant and very abundant, respectively, on trees 36 and 



37, while tree 82 was very badly infested in the spring of 1900, 

 and, though very few were found on it at the end of that season, 

 •some might easily have escaped the second treatment under the 

 shelter of old scales. 



Good's whale oil soap no. 3 and lofo petroleum. The Standard oil 

 was used in these experiments. This combination was tested 

 on 13 trees. They are as follows. Trees 15, 16, 60, 61 and 101 

 are seckel; trees 17 and 62, an early unnamed variety, and tree 

 102, a beurre bosc pear. Trees 34, 35, 79 and 80 are globe peach 

 trees; tree 34a, a natural sprout. Their condition near the end 



