The Peach-Tree Boree. 



211 



recom mended. We will discuss such combinations in onr general 

 conclusions to follow this detailed account of remedial measures. 



II. Preventive Measures. 

 {a) By the use of other jylctnts. 



The theory that tlie odor, or some other quality, of certain plants 

 would keep insects away has led some to recommend that such plants 

 be set beside peach trees to preserve them from attack by borers. 

 We find tomatoes, tansy, red cedar and wormwood thus recommended. 

 How tomatoes could afford any protection, it is dithcult to conceive, 

 hence the suggestion of their use seems to have scarcely survived its 

 birth. Practically the same results followed the recommendation, 

 as early as 18-11, to plant red cedar or vrormwood in the same hole 

 with the peach tree, although the odor of these plants afforded a 

 slight hold on which to pin one's faith that it might possibly have 

 some preventive effect. 



Tansij. — It was recommended to grow this weed around peach 

 trees, as early as 1841. Although many people were equally as 

 skeptical about its protective properties as they were of red cedar, 

 yet the fact that so eminent an entomologist as Dr. Fitch thought 

 it merited atrial, led several to test it. Peticolas (1860) and '' T. 

 Y. P." (Count. Gent, for 1862, p. 357) reported that it had no effect 

 on the number of borers. 



The following tabular statement tells the story of our experience 

 with tansy : 



Z^ntreated trees. 



128 1 April, 1895.. 

 128 June, 1896.. 



60 (47^) 

 68 (53,',') 



138 

 176 



8 

 8 



The above results afford some evidence that tansy exercised a 

 slight preventive effect u^^on the number of borers. We do not 



