WHITISH GRUBS BORING IN THE STALK 135 
If early 
varieties 
Fic. 120.— Adult of the Squash Borer. 
: are planted 
Slightly enlarged. Original. are pl ant 
as traps, 
the moths will lay on them rather than on winter 
varieties. All vines should be gathered and 
burned as soon as mature. Fall cultivation 
followed by deep spring plowing will kill many 
of the larve in the soil or prevent the moths 
from emerging. Moist earth drawn over the 
vines at joints will induce the formation of ad- 
ditional roots, enabling the plant to withstand 
attack. The vine may be slit and the borers 
removed. 
The Potato Stalk-borer (Trichobaris trinotata Say) 
The potato stalk-borer is a small, yellowish- 
white grub, half an inch long, which bores in the 
Fig. 122. — Adult of the Potato Stalk-borer. Enlarged 
and natural size. Original. 
larva 
Eggs are laid on the vines 
by the adults in early summer. 
The parent is a handsome moth. 
There is one generation in the 
north, but usually two in the 
south. The 
ground to pass the winter. 
enters the 
Fig. 121.— Work of 
the Potato Stalk- 
borer. 
Original. 
