Pp]ACH-TKEp] Borer. 



219 



dollars per tliousand, says Stediiiaii. It required two of these 

 wrappers to properly encircle most of our trees, as shown in figure 

 53. We p)ut them on twenty-one trees in the same manner as we 

 did the wire cashes. 



On April 30, 1901, we examined the ti'cated trees, and also 

 thirty-four untreated ones to serve as checks to the experiments. 

 The results in tabulated form are as follows : 



Missouri Gas Tar. 



When applied. 



29 June, 1900 



Number 

 of trees 

 treated. 



34 



When examined. 



30 April, 1901 



Number 

 of trees 

 infested. 



im) 



Number 



of borers 



found. 



of borers apphea- 

 in one 



tree. 



tion on 

 tree. 



None 



The Missouri fjas tar kept out all the borers but one, and it did 

 not injure the trees in the least. Gas or coal tar is the most effective 

 application we have ever used to keep out the peach-tree borer. But 

 do not fail to read our precautionary hints in Bulletin 176 before 

 applying it. 



The uiire cage protectors^ cipplied as Stedman directed (figure 

 51), which should have been theoretically more effective than the 

 ones we used in 1894:-1896 (figure 52), were ])racticaUy no more 

 effective than the latter. For, a larger percentage of the trees 



