INJURY BY DISINFECTANTS TO SEEDS AND ROOTS. 25 
Table VI. — Injury to pines and weeds by miscellaneous disinfectants— Continued . 
Plat. 
Disinfectant. 
Substance 
used. 
Per square 
foot. 
Ounces. 
Solu- 
tion. 
Days from 
treatment 
to- 
Sow- 
ing. 
Weed 
exami- 
nation. 
Injury to pines. 
Weeds present in 
plats. 
P. resinosa— Con- 
tinued. 
K 
* 
* 
Series 516 1 (2 
checks). 
{Sulphuric acid 
Air -slaked 
lime. 
{Copper acetate 
Air -slaked 
lime. 
None 
0.50 
.25 
,281 
,25 
Pints 
4 
D 
F 
Series 518 » (6 
checks). 
Hydrochlor i c 
acid. 
Nitric acid 
Sulphuric acid 
do 
None 
562 
562 
.188 
.281 
Formalin * 
.do. 
.do, 
Mercuric chlo- 
rid. 
[....do 
^ Sodium chlo- 
l rid. 
{Mercuric chlo- 
rid. 
Air -slaked 
lime. 
Zinc chlorid . . . 
Copper sul- 
phate. 
Hydrochlor i c 
acid. 
Nitric acid 
Sulphuric acid 
.375 
.562 
1.00 
.063 
.063 
.188 
.094 
.094 
.281 
.188 
.375 
.562 
.125 
42 
42 
None. 
Slight or none. 
(2) 
None. 
do 
do 
45 
None. 
do 
do 
do 
do 
do 
do 
Slight, or none 
None 
do 
do 
[Grass, 15 to 20 
| plants; Euphor- 
I bia and Portu- 
[ laca, 1 or 2 each. 
Same abundance 
| as in checks, but 
I in much less vig- 
[ orous condition. 
Grass abundant, 
followed by Mol- 
lugo, Portulaca, 
and Euphorbia in 
the order named. 
Grass, 4 plants. 
Grass, 12 plants; 
Mollugo, nearly 
same number. 
Grass, 2 plants. 
None. 
Grass abundant, 
strongly predom- 
inating; Mollugo, 
Portulaca, Ama- 
ranthus, and Eu- 
phorbia follow in 
the order named. 
Grass, 14 plants; 
Mollugo, nearly 
as many; Ama- 
ranth us, 2 or 3. 
Grass and Mollugo, 
a dozen plants; 
Amaranthus, 2. 
Grass, 4 or 5 plants; 
Mollugo, 4. 
Grass frequent. 
[Grass, 5 or 6 
plants; Mollugo, 
[ 1; Amaranthus, 1. 
Nearly as many as 
in nearest checks, 
but larger pro- 
portion of grass 
1 than in check. 
Grass, 4 plants; 
Mollugo, 1. 
Grass, 9 plants; 
Mollugo, 2. 
Grass, 10 or 12 
plants. 
More grass than in 
P; Mollugo and 
Amaranthus also 
present. 
Practically the 
same as in near- 
est check. 
1 Watered 0.3 inch twice daily. 
J A little at a margin missed in watering. 
3 Watered 0.3 inch, usually twice daily; surface of plats never allowed to become dry. 
4 Plats covered tightly for 3 days after treatment to prevent too early evaporation. 
