APPLE INSECTS 39 



hatch in 4 or 5 days, and the yellowish-white footless grub 

 eats out a winding burrow in the fruit or may form a large 

 irregular feeding chamber. The grubs are unable to develop 

 in apples that continue to grow, being killed in many cases by 

 the pressure of the proliferating plant c(^lls. Under favorable 

 conditions they become full-grown, and pupate in about 30 days 

 on the average. The eggs are often laid in decaying fruit, and 

 as many as 20 beetles have been reared from a single apple, 

 although 4 or 5 is the more usual number. The pupae occupy 

 cells inside the fruit, and in a little over a week transform to 

 beetles. The beetles remain about the trees during the re- 

 mainder of the season, going into hibernation at the approach 

 of cold weather. There is only one generation a year. 



Remedial treatment. 



The fact that the beetles feed more or less on the foliage makes 

 it possible to kill them by spraying with arsenate of lead applied 

 as for the codlin-moth. It has been shown in West Virginia 

 that when the trees are treated in this way the injurious work 

 of this weevil is completely prevented. 



Reference 

 W. Va. Agv. Exp. Sta. Bull. 12(3. 1910. 



The Green Fruit-worms 



Xylina antennata Walker 

 Xylina laticinerea Grote 

 Xylina grotei Riley 



While very widely distributed throughout the United States 

 and Canada, these three very closely related species have only 

 occasionally attracted attention by their attacks on apples and 

 other fruits. They caused considerable loss in Illinois and 

 Missouri in 1870 and hi New York in 1877, 1890 and 1913. 



