INSECTS INJURIOUS TO RASPBERRY AND BLACKBERRY 407 



June. Possibly, therefore, two years may be required for maturing 

 a generation, and the fact that the pest does not increase may be 

 due to the cutting back of the injured tips of the young canes. 



Control. As soon as the tips are seen to droop they should 

 be cut off below the point girdled and burned. When the entire 

 canes die from the effect of being tunneled, they should be cut 

 in late summer before the larva? have gone to the base to hiber- 





FIG. 340. Egg of the rasp- 

 berry cane-borer, showing 

 girdling of cane. (Photo 

 b 



FIG. 341. Young grubs and exit hole 

 of the raspberry cane-borer. (Photo 

 by Headlee.) 



)y Headlee.) 



nate. Where such measures are practised the pest may be effec- 

 tively controlled. 



The Striped Tree-Cricket * 



Professor Parrott has recently shown in an interesting bulletin 

 from the New York station that the tree-cricket which most 

 frequently attacks the raspberry is not, as had been supposed, 

 the snowy tree-cricket (Oecanthus niveus DeG.) but a different 

 species, the one named above. The snowy cricket confines its 

 attentions more to apple and other tree fruits. 



* Oecanthus nigricornis Walker. Family Gryllidcc. See Parrott and Ful- 

 ton, Bulletin 388, N. Y. (Geneva) Agr. Exp. Sta, 



