SECTION III. 



INSECTS, DISEASES, AND REMEDIES. 



There are but two insects that we have 

 known to injure pear trees in New England, 

 although Downing affirms that the same in- 

 sects that infest the apple do sometimes attack 

 the pear also. 



1st. The Slug-worm. This insect (Selan- 

 dria Cerasi of Harris,) is .a kind of olive- 

 colored naked snail, about a quarter of an inch 

 long. It appears on the upper sides of the 

 leaves, from June to August, and frequently 

 does serious injury to young trees, by preying 

 upon the juices of their leaves. An excellent 

 way to kill these vermin is to water the 

 leaves with the whale-oil soap liquid, de- 

 scribed on page 109. Ashes or quicklime 

 sprinkled upon them, will also destroy them. 



3d. The Scolytus Pyrl This insect is 

 supposed to cause what is called the Fire- 



