INSECTS INJURIOUS TO THE APPLE AND PEAR 557 



be given just' after the blossoms have fallen and before the 

 sepals of the calyx close, the object being to place the poison 

 in the calyx cavity so that the little larva will be poisoned when it 



FIG. 494. Young apples in right condition to spray for the codling moth 

 and with calyx sepals closed too far for effective spraying. (After Quaint- 

 ance, U. S. Dept. Agr.) 



enters and feeds in the calyx a few weeks later. In general this 

 spraying should be given within a week or ten days after two- 



FIG. 495. Work of the first generation of codling moth larvaB. 



thirds of the petals have dropped, but the time will depend upon 

 the variety and the season. 



In the West great emphasis has recently been placed upon 



