44 Farmers’ Bulletin 1220. 
the roots usually being first indicated by the unthrifty condition of 
the plants. The grape root-borer has been recorded from Kentucky, 
Minnesota, Missouri, North 
Carolina, Maryland, Ohio, 
West Virginia, and Ver- 
mont, and probably occurs 
elsewhere in the Middle 
West and in the Eastern 
States. Its most serious 
attacks have been in West 
Virginia, North Carolina, 
and Kentucky. The adult 
is a wasplike moth (fig. 48), 
a near relative of the so- 
called peach borer. The 
moths begin to appear from 
pup in the soil about the 
middle of July and continue 
to emerge until about the 
middle of September. The 
eggs (fig. 49) are deposited 
on the leaves and canes of 
Fig. 47.—Larve and injury to grape roots by the ie Bee ue eet ue 
Sraveine Caniebore quently on grass, weeds, or 
trash surrounding the 
plants. The resulting larve burrow into the soil and attack the 
larger grape roots and are able to penetrate the earth for a con- 
siderable distance in their search 
for food. The larvee pass the win- 
ter in chambers or cells at the 
ends of their burrows in the roots. 
Feeding is resumed with the ap- 
proach of warm weather in the 
spring. Uponcompletion of growth 
a cocoon is made, the pupa stage is 
entered (fig. 50), and the moths be- 
gin to emerge about the middle of 
July, as stated. 
METHODS OF CONTROL. 
This species can not be controlled 
by usual insecticidal practice in 
vineyards. Thorough cultivation F1¢. 48. 
of the vines during June and July 
is probably beneficial in destroying some of the larvee, but by far the 
most valuable method is maintaining the plants in a vigorous and 
Parent or moth of grapevine 
root-borer. Enlarged. 
