626 INSECT VESTS OF FARM, GARDEN AND ORCHARD 



like a small white blister about the size of a pinhead. It is at 

 first quite transparent, but later a brownish or blackish streak 

 is seen, showing the little caterpillar forming within. The eggs 

 hatch in from five to ten days, depending upon the season and 

 temperature, most of them hatching about three or four weeks 

 after the blossoms fall. 



The yoimg apple worm- is at first only about one-sixteenth 

 inch long, of a whitish color, with a shining black head, and 

 with distinct blackish tubercles over the body, which become 

 quite indistinct in later life. Upon hatching the young larva 

 usually feeds a little on the tender parts of the leaves before 

 it crawls to the nearest apple, which is probably 8 or 10 



FIG. 482. Pupse of codling moth in cocoons enlarged. (After Slingerland.) 



inches distant. About two-thirds of the larva; enter the apples 

 through the blossom end and feed a little within the calyx before 

 they bore inward to the core. The others enter at the stem end 

 or at the side, where a leaf may touch the apple. The seeds of 

 the apple seem to be most relished, for the larva soon hollows 

 out each of them as well as the surrounding core, its work being 

 indicated by the well-known excreta thrown out from the calyx, 

 showing the " worminess " of the apple. The larva becomes full 

 grown in from three to four weeks and eats its way out through 

 the side of the apple, leaving a round exit hole, and seeks a place 

 to form its cocoon. The full-grown caterpillar is about three- 

 quarters inch long, whitish or pinkish in color, with a brown head 



