CONTROL OF THE GRAPE-BERRY MOTH. 
15 
the spray was applied directly to the grape clusters with "trailers" it 
did not adhere to the waxy skin of the grape berries, except when the 
solution to which soap had been added was used. These features, 
(1) the application of the spray directly to the grape clusters and (2) 
the addition of soap to the solution, 
were the most important changes 
which were suggested by this sea- 
son's work. 
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EXPERIMENT IN THE MOORHEAD VINEYARD, 
MOORHEADVILLE, PA., 1914. 
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Experimental work in the Moor- 
head vineyard was conducted in a 
section of 38 rows, comprising about 
5 acres, which was divided into 4 
plats of 8 rows each and one of 6 
rows, the latter used as the check 
plat. The arrangement of the plats is shown in the diagram (fig. 1). 
The vineyard was rather evenly infested throughout. 
Table 4. — Spray mixtures used, methods and dates of application, and percentages of in- 
festation in experimental plats, Moorhead vineyard, Moorheadville, Pa., 1914- 
Fig. 1. — Diagram showing arrangement of ex- 
perimental plats in Mr. J. M. Moorhead' s vine- 
yard, Moorheadville, Pa., 1914. (Original.) 
Dates sprayed 
with set nozzles. 
Dates 
sprayed 
with 
trailers. 
Arsenate 
of lead 
(paste). 
Bordeaux mixture. 
Laundry 
soap. 
Water. 
Infesta- 
tion. 
Plat No. 
Lime. 
Copper 
sulphate. 
I 
June 9, 23, and 
July 9 
Pounds. 
3 
3 
3 
3 
Pounds. 
3 
3 
3 
3 
Pounds. 
3 
3 
3 
3 
Pounds. 
Gallons. 
50 
50 
50 
50 
Per cent. 
25.6 
II 
June 23 and July 9 . 
June 23 
26.7 
III.... 
July 9 
July 10 
27.8 
IV... 
.do. . . 
1 1 
22.9 
31.8 
sprayed. 
1 Last application only. 
Though the experiments in this vineyard showed a consistent 
reduction of infestation, definite control of the grape-berry moth was 
not established. In one plat the results appeared somewhat more 
favorable than in the others and offered a suggestion for further 
investigation. Soap was added to the spray mixture and " trailers" 
were used in applying it, but as these changes had been made only 
for the last application they could not affect the results materially. 
EXPERIMENT IN THE PHILLIPS VINEYARD, NORTH EAST, PA., 1914. 
Experimental work in the Phillips vineyard was conducted in a 
section which included 44 rows, covering about 7 acres. It was 
divided into 7 plats of 6 rows each. The middle row of each plat 
and the two rows at one side were chosen for checks. The arrange- 
ment of the plats is shown in the diagram (fig. 2). 
