DISEASES, INSBCTSj AND ENEMIES. 271 



This is almost sure to finisli any sick aphides that may be in the process 

 of recovery, as well as to hit any that may have been missed on the first 

 application. Then n, series of heavy shower baths should succeed the 

 poisoning processes in order to wash off the rough of the tobacco and 

 wash down the dead flies and much of the dehris they may have left 

 behind them. Some prefer tobacco dust or snuff to the liquid. It 

 lequires, however, more time, and is in no respect better than the other. 

 The best way of applying it is to wash the trees over with water, until 

 the leaves are thoroughly wetted. Then take a dredge, like a large 

 pepper-boi, and scatter the dry snuff over the infested parts. The snuff 

 kills the aphides, but it is a difficult and tedious process to get it into 

 contact with them all. Quassia chjp tea, a strong infusion of Gishurst 

 Compound, wiU also kill aphides. But, upon the whole, there is no 

 better nor more potent remedy than the oldest of all — ^tobacco liquor, 

 diluted with three or four times its volume of water, according to its 

 strength. Amateurs wh6 have peach or nectariae trees in their 

 dwelling houses, and lady cultivators who hate to handle or smell the 

 weed in any form, may clear their trees of the fly by dissolving an ounce 

 of smelling salts in a gallon 6f water, and syringing the trees with this 

 pleasant and refreshing ammoniaoal liquor. 



XIV. — Brown and White Seale. 



Ths latter seldom attacks peach trees, the former frequently, especially 

 nnder gUiss, though it is also not uncommon in some gardens in the open 

 air. Once established, it has- unfortunately a wonderful tendency to 

 reproduce itself. It adheres firmly to the wood and feeds on the bark, 

 seldom, unless very abundant indeed, infesting the leaves to any 

 extent. The best means of extirpation consist in scraping or rubbing 

 off the scale as soon as one is seen. A small hard brush and a strong 

 lather of soap and water are the best means to employ. If the trees, 

 however, are much infested, they should be dressed over with tram oil 

 in winter, taking care that every portion of the wood is smeared. This 

 Is a far more simple and effective remedy than the different smears com- 

 pounded chiefly of sulphur, soap, tobacco juice, clay, or cow dung, so 

 generally recommended for smearing peach and other trees. 



XV. — Caterpillars. 



Thb different saw flies and beetles] often do considerable injury to 

 peaches and nectarines. Of these the larvse of figure of 8 moth, the 



