The Peach-Tree Borer. 



205 



mended to do ; and we confidently expected to find one or more 

 sure methods for controlling the ravages of the pest. We doubt if 

 so extensive and thorough a series of experiments were ever made 

 against borers of any kind in any country, and surely not against 

 the peach-tree borer, hence our results sliould furnish much data for 

 future recommendations of methods for fighting borers of all kinds. 

 Sometimes results are rendered inconclusive or uncertain on 

 account of the non-appearance of the insect in sufticient numbers to 

 enable one to draw definite conclusions, regarding the efi^ectiveness 

 of any method. As the following table indicates, the " old relics " 

 of peach trees located near our experimental orchard have furnished 

 us a goodly supply of borers to combat : 



Table Showing the Number of Borers Found in the Whoie 



Orchard for Each Year. 



Similar Record for the Untreated or Cheek Trees only. 



1895 

 1896 

 1897 

 1.899 



128 

 176 



137 



47 



From the above table we learn that, in spite of the fact that two- 

 thirds of tlie trees were treated during four of the years to protect 

 them from the attacks of the borer, the average for the whole period 

 of six years is almost a borer (.9 is the exact number) to each tree 

 each year ; the average for the check or untreated trees for four 

 years is over one (or 1.1) borer in each tree. Usually over one-half 

 of tlie check trees were infested each year, and nearly one-half of 



