FOES AND FRIENDS OF THE PLANT 



189 



the young apple (figure 102) . After a while they bore their 



way through the apple and come out, and turn into moths 



which lay more eggs. The worms from 



these are called the second brood, and they 



enter the young appKs~and feed on them. 



Several broods may be produced in a 



season, but a large part of them may be 



killed by spraying at the right time with 



lead arsenate. 



Enormous quantities of pears and apples 

 are spoiled for the market by the burrows 

 which are seen when the apple is cut. 

 (Arizona Experiment Station, Bulletin 57; 

 California, 155; Idaho, 55, 61; Oregon, 69; 

 New Mexico, 41, 65, 68; Utah, 65, 87, 95; 

 Washington, 68, 77, 81, 86.) 



Tussock moth, or horned caterpillar. 



This caterpillar (figure 103) which attacks F IG 102. Codling 

 apple trees is remarkable for being so little 

 affected by sprays. The best remedy is to 

 destroy the eggs by picking them from the tree. The cater- 

 pillars may be shaken from the trees. To keep them from 



moth worm in a 

 young apple. 



FIG. 103. Tussock moth or horned caterpillar. 



