258 



APPLIED ENTOMOLOGY 



they may find, -and within these they pupate, taking about 3 weeks 

 in this stage before the moth appears. 



An unusual feature in this life history is the long period spent in the 

 egg, which may be almost 10 months. 



Control. Although this insect has numerous enemies both among 

 birds and insects, there are periods during which these are unable to 

 prevent trees being stripped by the pest. In general, the calyx spray 

 used on apples and pears for the Codling Moth is sufficient to destroy 



FIG. 260. Larvae 



of the Apple-tree Tent-caterpillar, natural size. (From Britton, 

 Thirteenth Rcpt. Ent. Conn. Agr. Exp. Sta. 1913.) 



this caterpillar also. On wild cherry and other trees not usually sprayed, 

 however, it finds a breeding place from which the fruit trees may be 

 restocked, and such trees should also be cared for, to prevent this. 

 Examination of such trees any time between August and March, to find, 

 cut off, and burn the eggs, and the destruction of the caterpillars while 

 in their tents on rainy days or at night, either by crushing or by burning 

 with a torch, are desirable auxiliary treatments in addition to spraying. 

 The torch method should not be used on young fruit trees, however, as 

 holding the torch at a fork a moment too long is liable to injure this 



