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pupa, and by the time the apple blossoms are falling the 

 moth escapes from the pupa and begins to fly among the trees. 

 About a week after the petals fall, egg laying begins. The 

 eggs are tiny white specks, placed singly, either on the fruit, 

 its stem, or even on some leaf near by, and each moth may 

 lay from 50 to 75 eggs. About a week later the eggs begin 

 to hatch, and the little caterpillars crawl to the apples, if 

 not already on them, and about three-quarters of them pass 

 to the blossom end. Here they gnaw their way into the 

 space between the sepals, and begin to feed. After a day or 

 two each starts in toward the core, around and in which it 

 feeds till nearly full grown. It now makes a tunnel toward 

 the surface. Arriving there, it forms an exit hole which it 

 keeps closed with silken threads mingled with excrement till 

 it has finished feeding, when it leaves the apple and crawls 

 down the trunk till it finds a suitable loose piece of bark 

 beneath which to pupate. 



Some of the caterpillars, — perhaps 25 per cent, — how- 

 ever, do not enter the apple at the blossom end, but at some 



scar on the surface, where 

 a leaf rubs against the 

 fruit, or elsewhere. For 

 these after they have once 

 entered the apple the his- 

 tory is the same, but the 

 difference in the place 

 where they enter makes a 

 great difference in treat- 

 ment necessary. In either 

 case nearly a month is 

 spent in the fruit, and the 

 first caterpillars appear to 

 finish feeding about the 

 first of July. After 

 these have gone to the 

 trunk and pupated, two or three weeks are spent in this con- 

 dition before the moth appears. Later caterpillars, however, 



Codling moth: a, work of caterpillar; h, point of 

 entrance; d, pupa; e, full-grown caterpillar; /, 

 g, moth; h, head of caterpillar; i, cocoon. 



