4 Farmers’ Bulletin 1220. 
cipal importance. Several of these species in certain sections rank 
as first-class pests, such as the grape rootworm, grape-berry moth, 
grape curculio, grape leafhopper, grape leaf-folder, grapevine flea- 
beetle, rose-chafer, grape phylloxera, and the like. Some of the 
species treated are ordinarily not important except during occa- 
sional seasons, or more or less locally, but are nevertheless the sub- 
ject of considerable inquiry 
each year. 
Grape insects are not less 
amenable to treatment than 
insect pests of other fruit 
crops, and the vineyardist 
may confidently expect to 
keep them under control by 
the application of the rem- 
edies herein recommended. 
As the reader will learn in 
the following pages, the 
principal insect and fun- 
gous enemies of the grape 
may be controlled with ma- 
terial reduction of cost by 
timely and thorough appli- 
cations of a spray in which 
are included one or more 
insecticides and a _ fungi- 
cide. As in the control of 
most other insect pests, cul- 
tural methods are of very 
great importance. Vines kept in a vigorous and healthy condition by 
cultivation and fertilization are better able to withstand insect attack 
than those growing under conditions of neglect. 
INSECTS ATTACKING THE FRUIT AND BLOSSOMS. 
THE GRAPE-BERRY MOTH." 
Fig. 1.—Grapes injured by grape-berry moth 
larvae. 
The larva of the grape-berry moth infests the berry or fruit of the 
grape. The first generation attacks and webs together the grape 
clusters, even before the blossoms open, or soon after the grapes are 
set. Later appearing larve bore into the green or ripening fruit, 
often producing purplish spots, much resembling in appearance the 
injury due to the black-rot fungus. Within the fruit the larva feeds 
on the pulp and seeds, passing from one grape to another, and several 
discolored and shriveled berries will often be found more or less 
webbed together with particles of larval excrement and sticky with 
exuding grape juice (fig. 1). 
1 Polychrosis viteana Clemens. 
