q4 Farmers’ Bulletin 1220. 
SPRAYING ACCESSORIES. 
SPRAY NOZZLES. 
The disk-whirlpool type (fig. 78) of spray nozzle is extensively 
employed by commercial fruit growers and is well adapted for use 
with vineyard outfits. These nozzles are provided with interchange- 
able disks, each having a differ- 
ent sized opening to give a fine, 
medium, or coarse spray. For rapid 
spraying with outfits having suff- 
cient capacity and pressure, two 
nozzles may be used on each spray 
rod. These may be attached by 
means of a Y. 
STRAINERS. 
To avoid trouble and delay from 
clogging of nozzles it is necessary 
thoroughly to strain the mixture 
as it is put in the sprayer. A 
strainer such as is shown in figure 
79 is convenient for this purpose. 
js Fic. 78.—Angled nozzle of the eddy- 
The brass-wire screen should be ¢hamber of whirlpool-disk type: 
20-22 mesh to the inch. 
-GRAPE-SPRAYING SCHEDULE. 
FIRST APPLICATION. 
About a week before the blossoms open, or when the new shoots are 
from 12 to 18 os long, spray with Bordeaux mixture 4—3-50 
(pp. 68-70) for fungous diseases, adding 
2 to 3 pounds of arsenate of lead paste, or 
one-half that quantity of the powdered 
form, for the flea-beetle, rose-chafer, ete. 
SECOND APPLICATION. 
Just after the blossoms fall spray with 
the same materials as in the first appli- 
cation for the same fungous disease and 
insects and also for the grape-berry moth, 
grape leafhopper, and the adults of the 
Fie. 79. 
Strainer for use in re- ; » ‘ & 
moving sediment in sprays grape rootworm, using the trailer 
when being poured into the ' re 6 
» ‘ 5 Dj. 
Burke en method (p. 73, fig. 76) 
THIRD APPLICATION. 
About two weeks later use Bordeaux mixture 4-3-50, arsenate of 
lead paste 2 to 3 pounds (or one-half quantity of powdered arsenate 
