Insect and Fungous Enemies of the Grape. a 
CONTROL. 
The grape-berry moth can be effectively controlled by thorough, 
timely sprayings of the vines with arsenate of lead. Two applica- 
tions of the poison are nec- 
essary; the first, three to 
four days after the blos- 
soms have fallen; the sec- 
ond, when the little grapes 
begin to touch in the clus- 
ter, or about three to four 
weeks after the first treat- 
ment. The spray should 
be directed against the blos- 
soms or fruit clusters, as 
these should be thoroughly 
coated to insure destruction 
of the larve. The poison 
is used at the rate of 14 
pounds of the powder or 3 
pounds of the paste to each 
50 gallons of spray. Where 
smaller quantities are de- 
sired, the poison is used at 
the rate of 2.4 ounces of the 
powder, or 4.8 ounces of 
the paste, to each 5 gallons 
of liquid. 
It is desirable to apply the poison in the Bordeaux mixture (pp. 
68-70), necessary for the control of fungous diseases. If the arsenical 
is used in water, the 
milk of lime from 2 
pounds of stone lime 
per 50 gallons should 
be added. One pound 
of rosin fish-oil soap 
to each 50 gallons of 
spray adds much to its 
adhesive qualities. 
Rosin laundry soap 
may be used if the 
former kind is not 
Fie. 6.—Grape berry infested by larva of grape-berry available. Little if ad 
moth. Enlarged. residue will persist on 
the fruit at harvest 
time from these two early treatments, and if these are thoroughly 
made they will, in the experience of the Bureau of Entomology, give 
Fic. 5.—Cocoon and pupa of grape-berry moth. 
Enlarged. 
