214 



Bulletin 1Y6. 



extensively discussed in the literature. In 1869 Walsh, Riley, Dean 

 and Wells submitted much evidence both for and against the mound- 

 ing method. So much was said in its favor that most writers have 

 strongly recommended it, but it seems to have been little used in 

 recent years by our most extensive peach-growers. Usually the 

 soil is mounded to a height of from 6 to 10 inches, but some have 

 made mounds 3 feet high around their trees. 



We tested the niethod for three years, making mounds from 6 to 

 8 inches high around the trees by simply hoeing up the surrounding 

 soil. We never hoed the mounds away in the fall. The following 

 table succinctly states our results : 



1894-1895. 



When applied. 



June 13, 1894. . 



Number 

 of trees 

 treated. 



n\ 



When examined. 



Number 

 of trees 

 infested. 



June 17, 1895. 



June 13. 1896. . 



21 



27^ 



April, 1895 ) 



May 1, 1895 ... - 

 May 24, 1895... ) 



1895-1896. 



June 10, 1896. . . / 

 June 11, 1896... - 

 June 17, 1896. . . ) 



1896-1897. 



June 23, 25, 29, I 

 1897 f 



9 (43 fo) 



Number 



Largest 

 number 



of borers; of borers 

 found. ! iu one 

 tree. 



13 



Effect of 

 applica- 

 tion on 

 tree. 



8 (38 ,^) 



7 (26 %) 



10 



None. 



None. 



2 None 



The table shows that the number of treated trees which were 

 infested was considerably less than the infested ones among the 

 untreated trees. A comparison of the number of borers found in the 

 treated and untreated or check trees brings out the significant fact 

 tliat the mounds kept out from ^ to y\ of the borers. Had we 

 made the mounds a few inches higher or hoed them away late 



