GRUBS INJURING THE ROOTS 225 
July, feeds on the leaves, and lays eggs in clusters under loose bark 
on the canes. The young grub, as soon as hatched, drops to the 
ground, makes its way to the roots, and 
feeds throughout the summer. When full 
grown, it is two fifths of an inch long, 
whitish, with a pale brown head. In the 
fall the larva goes deeper in the soil, and 
Winters in an earthen cell. In spring it 
returns to a point two or three inches 
below the surface of the ground, and in 
June makes a pupal cell, in which it 
Fie. 281. — Grape leaf showing characteristic 
work of the adults of the Grape Root-worm. 
Fic. 280.— The Grape 
Root-worm. Larve. 
Original. 
remains for nearly three 
weeks. The adults emerge 
from this in July. 
The most effective means 
of control is a thorough 
spraying of the vines the 
last of June, or as soon as 
beetles are seen, using ar- 
senate of lead 3 pounds, 
molasses 1 gallon, and water 
50 gallons. The molasses 
is added because it attracts 
the beetles and makes the 
spraying more effective. 
Stirring the soil beneath 
the vines about the middle 
of June will destroy many 
Original. pup2 in their cells. 
White Grubs (Lachnosterna spp.) 
Strawberry plants often are severely injured by white, thick-bodied 
grubs which feed.on the roots. Entire sections in large strawberry 
patches may thus be killed out. 
This is the same pest that attacks the roots of corn and other field 
Q 
