70 
preference to clean water in its stead ; if applied 
for the destruction of the remaining’ insects, why 
not save the labour and nuisance of applying the 
powder ? or if either or both of these are effica- 
cious for their destruction, I should say, only 
apply one of the remedies, which would save a 
deal of trouble ; but I must further say, that both 
trouble and expense would be justly prevented by 
excluding both practices, as they are both useless. 
As I have already alluded to the cause of the 
Honey Fall in the chapter on Apples, I would 
just observe, I must differ in opinion with 
Weighton and in place of supposing the insect to 
be allured by the Honey Dew, I would reverse 
the matter, and assert that, in a few days after 
the Green Fly appears, the Honey Dew, as it is 
commonly called, also appears ; and I would once 
more entreat Mr. W. and those of my readers who 
are of his opinion, to give it a due investigation, 
and they will no doubt be convinced that the 
glutinous matter is nothing more than what I 
have before, I trust satisfactorily, proved to be 
the excrement ejected by the species of Aphis in- 
festing the tree on which the fluid is found. 
The Cocci, or different species of Scale. — 
See respectively on Pears, Apricots, and Vines, 
and use the same method for their destruction. 
Caterpillars. — The various Caterpillars, I 
believe the same genus as those described on 
Apples, are very destructive to the bloom, fruit, 
and foliage of this ti’ee. They very often prevail, 
