554 INSECT PESTS OF FARM, GARDEN AND ORCHARD 



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 young 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 inches 



FIG. 489. Pupse of codling moth in cocoons enlarged. (After Slingerland.) 



distant. Over 90 per cent of the larvae 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 it 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 and 

 faint tubercles over the body, and with three pairs of thoracic 

 legs and five pairs of abdominal prolegs. The cocoons are found 

 mostly on the trunks of the trees, as in winter. The pupal stage 

 of the first summer generation lasts ten to twelve days, and 

 the moths emerge about eight weeks after the eggs were laid. 



