Teacher's Leaflet. 



117; 



covered. Prom 

 our standpoint 

 there is nothing 

 attractive about 

 the worm which 

 destroys the 

 beauty and appe- 

 tizing quahtiesof 

 our fruit, but 

 from the insect 

 standpoint the 

 codling cater- 

 pillar (which is 

 not a worm at 

 all) is not at all 

 bad. When full 

 grown it is about 

 three-fourths o f 

 an inch long, and 

 is likely to be 

 flesh color or even 

 rose color with 

 brownish head; 

 as a young larva 

 it has a number 

 of darker rose 

 spots on each seg- 

 ment and is whitish in color, the head, the thoracic shield on the first segment 

 behind the head, and the last segment on the body being black. When full 

 grown the apple worm is plump and lively, and while jerking 

 angrily at being disturbed we can see its true legs, one pair to 

 each of the three segments of the body behind the head. These true legs have 

 sharp, single claws. Behind these the third, fourth, fifth, and sixth segments 

 of the abdomen are each furnished with a pair of fleshy prolegs and the hind 

 segment has a proleg. These fleshy legs are mere make-shifts on the part of cater- 

 pillar for carrying the long body, and the three pairs of front legs are the ones 

 from which develop the legs of the moth. The noticing of the legs of the codling 

 moth is an important observation on the part of the pupils, as by their presence 

 this insect may be distinguished from the young of the plum curculio, which is 

 also found in apples, but which is legless. The codling moth has twelve segments 

 to the body back of the head. 



The codling larva usually enters the apple at the blossom-end and tunnels 

 down by the side of the core until it reaches the middle before making its way 

 out into the pulp. The larva weaves a web as it goes, but this is probably inci- 

 dental, as many caterpillars spin silk as they go; " street yarn " our grandmothers 

 might have called it. In this web is entangled the pellets of indigestible matter 

 making a very unsavory looking mass. The place of exit is usually circular, large 

 enough to accommodate the body of the larva, and it leads out from a tunnel which 

 may be a half-inch or more in diameter beneath the rind. Often the larva makes 



Just riglii to spray. A pear and two apples from which the petals 

 have recently fallen and with calyx lobes widely spread. 



