EXTERMINATING NOXIOUS INSECTS. 269 



ed. In some instances, at the West, these depredators are 

 so numerous that old cloths are laid in the crotches of the 

 branches for a few weeks, then they are passed through 

 a clothes-wringer to crush the cocoons, after which the 

 cloths are returned to trap other insects. If swine and 

 sheep are permitted to range about the trees, they will 

 usually destroy the fallen fruit with the Iarva3. When 

 swine are not permitted to have access to the orchard, the 

 fallen fruit should all be picked up and crushed, to destroy 

 the larvae. Hence we see that an incessant warfare must 

 be maintained if the fruit is saved. These depredators 

 must be caught and killed, or they will destroy the fruit. 

 The habits of this insect are now so thoroughly understood, 

 that it can be combated successfully in every stage of its 

 existence. By keeping the bottles containing sweetened 

 water (Fig. 51, p. 117), and the pan half-filled with thin 

 molasses, with a lighted lamp near it (Fig. 104, p. 268), in 

 the orchard every night, in good order, almost every insect 

 will be trapped in a few days. 



Apple-twig Borers. In many sections of country, Ap- 

 ple-twig Borers injure valuable trees by boring small twigs, 

 which often are so nearly cut in two that the wind breaks 

 them off. The only remedy thus far discovered is to " catch 

 'em and kill 'em." A constant watch must be kept over 

 every fruit-tree for insect enemies. Then, if any thing is 

 discovered that resembles the work of the Apple-twig Borer, 

 let the branches be examined with care, and the depreda- 

 tors destroyed. Cold steel is a certain remedy for this pest 

 of the apple-orchard. As these borers originate from a 

 parent insect that can be trapped in a bottle, the bottle- 

 traps will be found the most satisfactory way of destroy- 

 ing this kind of depredators. 



Bark Lice (Aphis mali). In many orchards, bark lice 

 are scarcely known ; while in others, where trees are young 



