The Feach-Tree Borer. 



231 



inches in diameter. It is a very cheap wash, is easily applied, does 

 not injure the trees, and lasts as long as desirable. Thus, theoreti- 

 cally, it is an ideal mechanical preventive coating or wash. 



We gave this wash a thorough test in 1898-1899, with the follow- 

 ing results : 



Years. 



1898-1899 



Untreated or check trees. 



56 



Same dates. 



25 iWc). 



41 



This table shatters another theoretical ideal, for there were more 

 infested trees among the treated than among the untreated ones, 

 and just as many borers got into the treated trees. We had 

 expected much more encouraging results from the use of this cement 

 wash, but it evidently has not the qualities which will make it of 

 any value to the peach grower. 



jPri7iter\s iiih. — This seemed to us to have qualities which might 

 make it a good wash for the peach-tree borer, hence we tested it 



with the followinir results : 



Years. 



1898-1899 



Untreated or check trees. 



56 



Same dates. 



25 (44j?). 



41 



Although the ink kept out about one-half of the borers, it caused 

 gummy exudations wliere it was applied, indicating injury to the 

 bark, hence it is not to be recommended. 



