64 



I have known them also disappear under the use of a preparation made from coal t;ir 

 sprinkled upon the under sides of the leaves ; but this rcmerly is seareely admissible. 



The trials with these remedies have not been very numerous, but appear to war- 

 rant confident statements concerning their efficiency. 



The insect is about one tenth of an inch long, and is represented in Plate No. 77, 

 magnified three linear times. 



When the cultivation of the Pyreihrum Duchartre becomes extended, we may 

 expect to find a valuable insect-destroyer in that. Meanwliilc, clean culture and free 

 open training will go so far to secure exemption from damage by insects and miklew 

 that the best vineyardists entertain but little apprehension from them. 



<6i>-' 



Plate No. 73. 



Plate No. TO. 



Plate No. TO. 



PUte No. 71. 



Plate No. 72. 



Plate No. 74. 



Plate No. 77. 



Note. — There are other leaf-folders (Tortrices) besides that mentioned at the 

 beginning of the chapter, that have done much damage in some of the south-western 

 vineyards, but I have too little personal knowledge of them to speak intelligently of 

 the remedy, which does not appear to me difficult or expensive, and that is, their entire 

 destruction. 



Plate No. 78 represents a Fa)i, with gearing for increase of rotary velocity, that was 

 invented for a sulphurator, but may also be used for a fumigatrr v;ith a slight change 

 and a little addition for the reception of the burning tobacco. 



Plate No. T& 



