52 INSECTS AFFECTING THE APPLE. 



inch long, and appears as represented at e. It has 

 now finished its caterpillar growth, and, leaving the 

 apple, finds some crevice in the bark where it spins 

 a rather slight silken cocoon in which it changes to 

 a pupa. It remains in this condition about a fort- 

 night, when it emerges as a moth like the one by 

 which the original egg was laid. Thus the life cycle 

 is completed. There are at least two broods in a 

 season. 



Remedy. — The best remedy for this insect is that 

 of spraying with the arsenites — Paris green or Lon- 

 don purple — in spring, soon after the blossoms have 

 fallen ell', when the apples are from the size of a pea 

 to that of a hickory nut, and before they have turned 

 downward on their stems. A second application, ten 

 days or two weeks after the first, is generally advisa- 

 ble. The poisons may be used in the proportion of 

 one pound to 250 gallons of water. The spraying 

 should be done with some kind of spraying pump 

 and nozzle. 



Besides destroying the Codling Moth, spraying at 

 the times indicated will largely prevent the injuries 

 of the various leaf-eating caterpillars and the Plum 

 and Apple Curculios. 



The Apple Maggot. 



Trypeta pomonella. 

 The injury of this insect is at once distinguished 

 from that of the Codling Moth from the fact that 

 while the latter is largely confined to the region of 



