10 
BULLETIN 550, U. S. DEPARTMENT OF AGRICULTURE. 
Hand picking of wormy fruit was done July 7 and 8 and again 
between July 25 and August 1. The time of the first picking occurred 
about 10 days after the falling of the blossoms, The actual time 
expended in this work was 35.5 hours for th*e two men employed, or a 
total of 71 hours. The second picking, which was more or less inter- 
rupted by rain, developed that about 12 per cent of the berries were 
wormy. 
The counts of wormy berries taken at harvest time showed the 
following percentages of infestation : 
South end. North end. 
Per cent. Per cent. 
Hand-picked plat 84. 4 24. 9 
Check 68. 2 25. 3 
This shows as a curious result that the hand-picked area was more 
heavily infested than the check, probably owing to the flight from 
the vineyard at large of moths which settled in this narrow protected 
area. 
Experiment in Moorhead Vineyard, Moorheadville, Pa., 1914. 
A plat of 16 rows, 2 acres in area, was chosen in the middle of the 
vineyard of the late E.. E. Moorhead. The infestation was com- 
paratively uniform throughout. Hand picking of infested fruit was 
done three times, July 2 and 3, again from July 17 to 21, and again 
from August 10 to 15. The total time occupied in treating the 2 
acres was 55 hours, or 27 J hours per acre. 
Counts of infested berries from four crates of grapes from the hand- 
picked plat were made and the same from the check plat. The 
following shows the percentage of infestation: 
Hand picked 14. 7 per cent. 
Check 27.4 per cent. 
Experiment in the McDonald Vineyard, Xorth East, Pa., 1915. 
The heavily infested ends of 12 rows of a vineyard section adjoining 
a woodlot were chosen for this experiment. The picked area extended 
along the rows about 70 feet. The plat was picked over once, August 
5 and 6, requiring a total of 22 hours' work for approximately 
one-fifth of an acre. 
Counts taken just before harvest from representative vines in the 
hand-picked plat and in the check plat showed the following results : 
Table 2. — Counts in hand- picking experiment, McDonald vineyard, North East, Pa., 1915. 
Plat. 
Number 
of vines. 
Number 
of 
clusters. 
Number 
of 
berries. 
Infested 
berries. 
Infested 
berries 
per 100 
clusters. 
Infesta- 
tion. 
12 
520 
546 
13. 664 
16.. 513 
2.592 
6,162 
498.4 
1,136.6 
Per cent. 
18.12 
Check 
12 
34.93 
