544 
Journal of Agricultural Research 
Vol.Vn, No. 12 
EGGPLANTS 
In the experiment with eggplants the standardization period extended 
two days from Aprils to April 5. The period after spraying continued 
from April 5 to April 18. 
The results of this experiment are presented in Table VI. 
Table VI .—Effect of Bordeaux mixture on the rate of transpiration of potted eggplants 
{Period before treatment, Apr. 3 to Apr. 5; period after treatment, Apr. 5 to Apr. 18, 1916] 
Plant No. 
Transpiration quantities. 
Green weight of 
tops. 
Dry weight of 
tops. 
Period before 
treatment. 
Period after 
treatment. 
Series 
A. 
Series 
B. 
Series 
A'. 
Series 
B. 
Series 
A'. 
Series 
B., 
Series 
A'. 
Series 
B. 
(A) 
< B ) 
(A') 
C B ) 
<G) 
(S') 
(/>) 
(DO 
20.9 
17-4 
400.1 
326.2 
12.02 
H -73 
1.67 
1.68 
27.9 
23*6 
336.2 
316.6 
II. 12 
12.63 
1.87 
1.83 
33-4 
40.0 
295-9 
426.2 
n -35 
18.10 
1.58 
2.72 
27.4 
26. 5 
445-7 
367-0 
15-11 
14.62 
2.14 
1-77 
30.I 
33-7 
494 -1 
394-2 
19.62 
14.19 
1.97 
1.99 
18.0 
IS -9 
292. i 
334-4 
12.40 
11.60 
1-52 
1-55 
Average. 
24.6 ; 
| 26.1 
377-3 
360.7 
13.60 
13-81 
i- 79 : 
1.92 
Transpiration.ratio,. 
A : B 
=0.94 
A' : B 
1 = 1.04 
Difterei 
ace. 
0.io 4 
Water loss per gram of green 
substance.ratio.. 
AG r : BG“*o .95 
A'G': BG=i.o6 
Difference. 
, _ 
.11+ 
Water loss per gram of dry sub¬ 
stance.ratio.. 
AD'; RD=*i.oo 
A'TV : TVD = t,T 5 
Difference_ 
. 124 - 
The results given in Table VI show a pronounced increase in the rate 
of water loss for the sprayed plants relative to the rates from the control 
plants, as is indicated by the higher ratio values for the period after 
spraying. The value of the ratio between transpiration quantities for 
the period after treatment is here 11 per cent higher than the correspond¬ 
ing ratio value for the period before treatment. Ratios between quanti¬ 
ties representing water loss per gram of green weight and water loss per 
gram of dry weight are each 12 per cent higher for the period after 
spraying than for the standardization period. 
TOMATO PLANTS 
It has been previously stated that the Bordeaux mixture employed 
throughout these experiments was prepared according to the 5-5-50 
formula of agricultural practice. When this mixture was applied to 
tomato plants, however, injury to the leaves resulted. In this experi¬ 
ment, therefore, the strength of the mixture was reduced to conform 
approximately to the 4-4-50 formula commonly used. This mixture 
produced no injurious effects upon the plants here employed. 
In this experiment the period of standardization extended from May 26 
to June 1; the period after treatment continued from June 1 to June 12. 
The experimental data are presented in Table VII. 
