THE APPLE 123 



for several weeks. When they are full grown in this 

 larval state they leave the apple and each spins a 

 cocoon under such shelter of loose bark as it can find. 

 Then it changes to a pupa, to change again in about two 

 weeks to a moth. There are usually two broods each 

 year, the insects passing the winter as larvae within the 

 cocoons. 



Four Apples Injured by Curculios: One Uninjured 



The larvae of the Codling Moth may be killed to a 

 great extent by spraying the trees with arsenate of lead 

 just after the petals fall, when the calyx cups are still 

 open. It is desirable to force the poison into the cups 

 by using high-pressure pumps that give a forceful spray. 

 One or two later sprayings are helpful, but not necessary. 



The Plum Curcuho often attacks apples. The female 

 beetles cut crescent-shaped marks in the skin of the 

 young fruit in order to deposit their eggs. The larvae 

 are commonly unable to develop in the apple, but the 

 injury done by the beetle causes the fruit to be gnarly 

 and one-sided. Fortunately the poison appUed to kill 



