336 INSECTS AND DISEASES. 



state is, to smoke the trees. They may also 

 be destroyed by sprinkling snuff or tobacco 

 dust upon them; but the former method is 

 cheaper arid more efficacious, as the smoke 

 will reach where the snuff, &c. could not 

 well be applied. The method I adopt in 

 smoking the trees is, to make fires, of moist 

 pea straw and tobacco mixed together. 



The tobacco I use for this purpose is what 

 I grow myself, and is dried previous to 

 using. 



If the wind be in such a direction, that if 

 fires be made opposite the trees, (and at a few 

 feet distance from them,) the smoke will be 

 conveyed to them, this must be done ; but 

 otherwise a cloth must be fastened over the 

 trees and smoke be introduced underneath 

 it, by means of a proper smoke bellows. 

 Immediately after the smoking has been per- 

 formed, let the trees have a forcible washing 

 by means of a syringe or garden engine. 

 In some seasons a repetition of the smoking 

 will be necessary. After the smoking and 

 washing has been performed, let the soil 

 underneath the tree be trodden well, or beat 

 with a spade, otherwise a slight sprinkling 

 of boiling water be poured over it, in order 

 to destroy those insects which have been 

 dislodged and fallen upon the ground. 



