SOME INSECTS INJURIOUS TO ORCHARD FRUITS 579 



\ 



beetles; the first emerge about ten weeks after the apples 

 blossom, the majority appear two or three weeks later, and the 

 rest continue to emerge until October. If the weather is dry 

 the beetles may remain in the cells much longer than normally, 

 while a shower \vill bring out numbers of them: Upon emerging 

 the beetles feed upon the 

 ripening fruit. In many 

 sections the injury to ap- 

 ples by the feeding punc- 

 tures then made is worse 

 than the spring injury, as 

 the surface of the fruit is 

 injured and entrance places 

 for rot are furnished. The 

 beetles average about one 

 puncture a day for six weeks 

 after emergence in central 

 Illinois and commence to 

 enter hibernation with the 

 first frosts. In New Hamp- 

 shire we have seen no evi- 

 dence of injury by the 

 beetles in late summer or 

 fall. 



Injury. Injured plums 

 and peaches usually drop 

 to the ground, or if they 

 remain on the tree, ripen 

 prematurely, and rot more 



quickly. Cherries stick to 



, ,1 ,- . FIG. 436. Work of the plum curculio 



the tree, but on apple: d> feeding punctures f rom 



often small and gnarled surfaceandinsection;e, egg puncture 



, ,1 from surface; e', same in section 



from the egg-scars, or eaten &u enlarged> ^ c g CrandaUi) 



-out by the larva. In ap- 

 ples the larva? only develop in those which drop to the ground, 

 the rapid growth of the apples probably crushing the eggs. The 



