64 DECIDUOUS FRUIT INSECTS AND INSECTICIDES. © 
EXTENT OF INJURY TO NEWLY BEARING VINEYARDS. 
As an illustration of the extent of injury done by this pest to young 
vineyards which came under the writer’s observation during the past 
summer, the condition of a block of vineyard growing on a level 
piece of ground in a clay loam soil near the lake shore may be cited. 
The vines had borne but three crops, and previous to the attack of 
the grape root-worm were very thrifty. The original planting con- 
sisted of 3,234 vines. An examination of the vineyard on June 17, 
1907, showed that 548 vines had been so badly injured by the grape 
root-worm that they had to be cut back to the ground; 897 vines 
were cut back to the lower wire and bore no fruit that season, and 
the remaining 1,794 vines were cut back to one or two canes. This 
treatment, made necessary by root-worm injury, resulted in a cur- 
tailment of 75 per cent of the crop. 
Figure 1, Plate VIII, shows the condition of the above-mentioned 
vineyard September 2, 1907. Figure 2, Plate VIII, shows vines in 
a younger vineyard only a few yards distant, bearing their first crop 
of fruit and not yet infested by the grape root-worm. (The owner 
informed the writer that at the same age the vines shown in figure 1 
were quite as thrifty as those shown in figure 2.) 
Another young vineyard, 6 years old, on a loose gravel soil, showed 
an even worse condition. In one section of 1,620 vines, 485 vines 
were killed outright in a single season, and nearly all the rest of the 
vines were so seriously injured that they had to be very severely 
cut back. The crop record of this vineyard is given below, and shows 
a decline in crop value, in 1907, of $379.80, or 87.17 per cent less than 
in 1906. 
TABLE 1.—Crop record of vineyard injured by grape root-worm. 
Number | Number 
Naar: . Of Net Value 
of : 
trays. | baskets. weight. | of crop. 
Pounds. 
1904s2. sae a 8 he a Dee Be oe Oe 295 None. 11,630 $127.51 
TO a ae Ag A I eee 613 696 23,705 410.77 
AS, 0 6 Sa ee ee mee Yar I Ne BU ED Pe a ay ee 581 588 21,130! 435.72 
1Q07. [27221 Ok os ee re Bia a ee a ee | 93 | None. 3,195 55.92 
Figure 1, Plate IX, shows the stunted condition of the vines in 
the above-mentioned vineyard, as a result of the grape root-worm 
injury. Figure 2, Plate IX, shows a normally thrifty uninfested 
vineyard at North East, Pa. It should be stated in addition that 
both of these injured vineyards had received the best of care, so far 
as cultivation and general management are concerned, with the ex- 
ception of spraying the vines to protect them from the beetles, and 
previous to 1906 both vineyardists were highly pleased with the 
vigorous condition of their vines. The illustrations cited above are 
