56 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. 
Just beyond this strip of continuous vineyard, however, toward 
Moorheadville, Pa., the vineyards are more scattered and the acreage 
surrounding them is devoted to the more general forage crops, such 
as grass, rye, corn, and other grains, together with considerable areas 
of unbroken pastures and woodlots. These scattered vineyards have 
always been menaced by the invasions of this pest from their adja- 
cent breeding grounds and serious injury has frequently resulted to 
the grape crop. 
The prevalence of the rose-chafer over this latter section has done 
much to discourage the planting of new vineyards, the general im- 
pression being that the insect can not be successfully or economically ° 
controlled. Handpicking the 
beetles has heretofore been 
the only control method em- 
ployed, and has proved not 
only tedious and expensive, but 
only partially effective. It was 
upon vineyards in this * rose- 
bug”? infested area along 
the lake shore that the spray- 
ing experiments of the season 
of 1910 were undertaken. 
HABITS OF THE LARVA. 
The larval stage of the in- 
sect (fig. 18, >) is spent under 
eround, usually among the 
roots of grains and grasses. 
; The female beetle (fig. 18, a) 
ie colle cual Denies Of erape injured ny > DuTrOws uutoy thes sama 
feeding of rose-chafer ; b, berry almost eaten ; and deposits her eggs singly 
a ice en onudee orené. an ema Fells 
the burrow. These burrows 
may be from 1 to 6 inches in depth, and the eggs are deposited irregu- 
larly in small cells in the walls of the burrow, the shallowest about one- 
fourth of an inch from the surface, the deepest about 4 inches below. 
The newly hatched larve may exist for some time on decayed vege- 
tation in the soil, but they soon attack the roots of grasses and other 
plants, and are seldom found in large numbers in soil receiving 
clean culture. They are, however, quite common in ill-kept sod- 
covered vineyards, and in digging about the roots of grapevines for 
other insects single specimens of rose-chafer larvee are found occa- 
14 loca) name for the rose-chafer (Macrodactylus subspinosus Fab.). 
