992 Farmers’ Bulletin 1220. 
Arsenate of lead is principally used at the rate of 24 to 3 pounds 
of the powdered form to each 50 gallons of liquid. The poison pref- 
erably should be used in Bordeaux mixture, essential for the con- 
trol of fungous diseases. The first application of spray should be 
given just before the blossoms open, and if the beetles continue de- 
structive the treatment should be repeated as soon as the blossoms 
have fallen. 
Fic. 21.—Grape foliage severely injured by rose-chafer. 
Some vineyardists have reported benefit from addition of glucose 
or molasses to arsenate of lead as rendering the spray attractive to 
the beetles. Experiments by the Bureau of Entomology have not 
shown added protection to vines so treated. 
According to experiments by the New Jersey Agricultural Expe- 
riment Station, the self-boiled lime-sulphur wash-(p. 66) thoroughly 
sprayed over the vines protects them from further important injury 
by this insect. The wash has been used with equal success in pre- 
