28 BULLETIN 1032, U. S. DEPARTMENT OF AGRICULTURE. 
Plats A and B constituted one section, containing about an acre 
of vines, C and D another to the south, and E, F, G, and H a third 
to the east of C and D. Since the infestation of these three sections 
varied somewhat it was thought advisable to have a check plat meas- 
uring 1 by 2 rods for each section. As noted in Table 4, they were 
23laced to leeward of the plats of which they acted as checks to pre- 
vent the unnatural spread of moths over the plats. These were num- 
bered 1, 2, and 3, respectively. 
The percentages of berries free from fireworm injury, as shown in 
Table 4, were obtained from an examination of the berries picked at 
harvest time from five circular areas of approximately 100 square 
inches each, selected at random on each sprayed plat. Berries were 
examined from three such areas on each of the check plats. 
The yield of each plat was obtained by measuring its entire crop 
as picked at harvest time. Plats A, B, C, and D were picked with a 
scoop, and plats E, F, G, and H were picked by hand. The first four 
plats included vines of the Howe variety and the last four, vines of 
the McFarlin variety, all of which had reached the age of normal 
bearing. 
Time and Ntjmber of Applications. 
The first three applications were made at practically the same time 
for ail plats, since the growth of the two varieties on these plats was 
very much the same. The first application was made on May 2 to 6, 
about the time when the largest number of buds were pushing forth 
but had not exceeded a growth of approximately three-fourths of an 
inch. This was the time when the young larvae were appearing in 
very large numbers but before many of them had got beyond reach of 
the spray. 
The second application was made May 20 and 21, when many blos- 
soms were in the hook stage, and was timed so as to catch the next lot 
of larvae before they could conceal themselves in the new growth. 
The third came June 13 to 17, when the vines were nearly in full 
bloom. It was designed to kill any late-hatching larva? of the first 
generation which might have been injuring the blossoms and newly 
forming berries. 
Plats C, E, G, and H received a fourth application on July 9 and 
10 at about the time many berries were already set. This applica- 
tion was intended to kill any very late-hatching larvae and the moths 
which appeared on the bogs in largest numbers about this time. 
The Bordeaux Nozzle. 
The Bordeaux nozzle is modeled so as to deliver a forceful, driving 
spray in the shape of a fan. The nozzle is so arranged that the in- 
tensity of the fan-shaped spray can be regulated as desired. In 
