30 BULLETIN 1032, U. S. DEPARTMENT OF AGRICULTURE. 
spraying plats B and G with this type of nozzle, an effort was made 
to hit on a nearly horizontal plane the underside of all the leaves, as 
well as to penetrate the vines and wet thoroughly with the spray solu- 
tion all parts of the uprights, including the tips, by directing a force- 
ful stream of spray, as shown in figure 12 b. The main idea was to 
wet the eggs and also to catch the young larvae in their burrows on 
the undersides of the lower leaves, as well as to wet any larvse in the 
tips at the time. 
As will be observed in Table 4, three applications with this nozzle 
on Howe vines in plat B at an average rate of 522 gallons per acre 
resulted in a gain in yield of 34.18 bushels per acre over the un- 
treated plat; 89.74 per cent of the berries examined from this plat 
were free from injury by the fireworm. On the McFarlin vines in 
plat G four applications at an average rate of 697 gallons per acre, 
with this type of nozzle, produced a gain of 153.81 bushels per acre 
over the check and 91.97 per cent of the sample berries were free 
from fireworm injury. The small yields of plats A and B were 
due largely to the fact that since the vines in this section had been 
very badly infested the previous season, they produced very scanty 
bloom, and they also appeared to suffer more from frost on May 4, 5, 
and 6 than the other plats. 
The Mist Nozzle. 
The mist nozzle used Avas of the eddy-chamber or whirlpool-disk 
type, somewhat larger than the Yermorel and without the center- 
cleaning punch of the latter. It is so constructed internally as to 
throw a medium fine mist in the form of a hollow cone of spray 
which, depending upon the pressure of the liquid, measures from 12 
to 18 inches in diameter about a foot from the nozzle. The outfit, 
as shown in figure 13, was made from galvanized iron pipe one-fourth 
to three-eighths of an inch in diameter on which four nozzles were 
placed 11 inches apart and the whole attached to the end of an ordi- 
nary 8 or 10 foot bamboo spray pole. The first nozzle on the end was 
set close to the pipe and each succeeding one was set 1 inch farther 
away than the preceding so that all would be the same distance from 
the vines when the rod was held by the operator in proper position 
for spraying. 
The applications with this type of nozzle on plats A and H were 
made with the primary idea of filling the terminal whorl of old leaves 
and the new unfolding leaves at the tip of the upright with the nico- 
tine sulphate and soap solution. As will be seen in figure 13, this 
spray was delivered on a more or less vertical plane, and no special 
effort was made to hit the underside of the leaves, entire dependence 
being placed on a thorough soaking of the tips of the uprights, which 
was quickly and easily done with this type of nozzle. 
