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 larve 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 pup (fig. 18, e) and then to the 
Fic. 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 ready 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 heen to handpick the beetles when they appear upon 
the vines. Since they are quite sluggish and cling somewhat tena- 
