SFANWORMS EATING THE LEAVES 



281 



When full grown, the worms enter the ground, and remain there 

 until the following spring. The adults come out several weeks before 

 the apple is due to blossom. The female is wingless, crawls up the 

 trunk, and lays her eggs. The male is winged. The eggs hatch after 

 the apple leaves have unfolded. 



Spraying with arsenicals, using rather heavy dosage, will kill the 

 worms. Instead of this the trees may be banded six weeks before the 

 apples are due to bloom, so as to prevent the females or the worms 

 from reaching the upper parts of the tree. Orchards that are regu- 

 larly sprayed with 

 poisons, such as arse- 

 nate of lead or Paris 

 green, will not suffer 

 from tliis pest. 



The Fall Canker-worm 



{Alsophila pometaria 

 Harr.) 



This species is quite 

 similar in characteris- 

 tics to the spring can- 

 ker-worm. The larva 

 may readily be recog- 

 nized from the fact 

 that it has two pairs 

 of prolegs near the 

 hind end of the body 

 just forward of the 

 claspers located on the 

 extreme hind end. Fig. 407. 

 whereas the spring 

 canker-worm has only one pair. The injury wrought by the two 

 species is identical. Either will strip the foliage from apple trees in 

 earl}' spring, when numerous. 



■The Fall Canker-worm, 

 larged. Original. 



Slightly en- 



