108 



The protection against trees being 

 shaken by the wind, or against cattle, 

 should be such, if possible, as would 

 not serve for shelter to insects, and be 

 usually v/ashed with the same materials 

 as above described. Although it is not 

 to be supposed that the eggs will in all 

 cases be affected by this application, yet 

 if it is used about the time of the insects 

 hatching, it is likely the young brood 

 may be killed thereby. 



The practice of ablaqueation, which is 

 stated to have been common with an- 

 cient gardeners, will be very applicable in 

 the present day. There does not appear 

 to be any mode more likely to get the 

 better of the evil occasioned by the aphis 

 lanata ; the roots of trees affected by this 

 insect, should therefore be laid bare in 

 the winter season, well washed, and left 

 to the action of the frost, and the appli- 

 cation of such things as urine, night 



however found, as soon as the ship reached a 

 warm climate, that innumerable insects bred in the 

 boxes, and he cautioned me, in a letter on that sub- 

 ject, and also the publick, from using such again. 

 See TransactioDB of Society of Arts, Vol. 27. 



