F R U I T-T R E E S. 265 



was not cjuite rotten, then add to every 

 gallon of water one ounce or more of com- 

 mon fait; and if thofe trees that are Ihaded 

 be watered once a w eek, it will do then^ 

 fervice. 



CHAP. XCIIL 



How to prevent Caterpillars deftroying 

 . Fruit upon Wall, or Dwarf- Trees. 



I Shall not attempt to defcribe the va- 

 rious kinds of infefts; but I have ob- 

 ferved two forts of caterpillars, or at leaft 

 thofe of two colours, feed upon fruit-trees, 

 the one black, and the other green : the 

 blatk generally make their appearance in 

 March, if the feafon be dry, upon the pear- 

 tree, apple, and feveral others. 



Sometimes there are great numbers of 

 them, in a fort of kel or web ; and if they 

 are to be come at, I chufe to take them off, 

 or otherwife they will difperfe themfelves 

 to all parts of the tree, and there feed up- 

 on the bloiTom leaves, or their buds, before 

 they are unfolded. After they have lived 

 in this a6tive ftate, fometimes they conceal 



them- 



