VINEYARD SPRAYING AGAINST ROSE-CHAFER. 



57 



sionally in well -tilled vineyards, although never in sufficient num- 

 bers to become a menace to the grape crop. The larvae usually at- 

 tain their full growth by late fall and at the approach of cold 

 weather burrow down below the frost line, returning, in the follow- 

 ing spring, to near the surface of the soil, where they make earthen 

 cells, in which they transform to pupae (fig. 18, e) and then to the 



Fig. 20. — Grape cluster showing almost total destruction of 

 berries through feeding of rose-chafer. (Original.) 



adult beetles. These beetles emerge just before the blossom clusters 

 of grapes are readj^ to break into full bloom. 



REMEDIAL MEASURES. 

 HANDPICKING THE BEETLES. 



The practice most commonly employed for the control of this pest 

 in the past has been to handpick the beetles when they appear upon 

 the vines. Since they are quite sluggish and cling somewhat tena- 



