24 BULLETIN 169, IT. S. DEPARTMENT OF AGRICULTURE. 
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. divaricata: 1 
Series 508 (< 
checks). 
N 
P 
M 
A 
D 
G 
H 
L 
U 
S 
Series 512* (5 
checks). 
None. 
Formalin - . 
.do.... 
.do.... 
.do.... 
.do.... 
.do.... 
.do.... 
.do.... 
Sulphuric acid 
....do 
None 
Hydrochloric 
acid. 
.do. 
.do. 
....do 
Nitric acid . 
P 
M 
J 
Series 514 & (5 
checks. 
....do 
S ul phur ic 
acid. 4 
....do 
....do 
....do 
None 
Hydrochlor i c 
acid. 
.....do 
Pints. 
0.375 
.375 
.562 
.75 
.75 
.75 
1.00 
1.00 
.25 
.375 
43-51.. 
43-51. 
43-51. 
None detected. 
Moderate. 
....do... 
25 
.375 
.562 
1.00 
.281 
375 
4 
5.5 
2 
47-48. 
None. 
Very slight 
Slight to moderate. 
....do 
Moderate 
Very slight. . 
Very heavy . 
Moderate. 
....do... 
Sulphuric acid 
....do 
....do 
None. . 
Slight. 
Heavy; £ affected. 
Heavy; J affected. 
....do 
Grass abundant; 
Mollugo, Portula- 
ca, Amaranthus, 
and Euphorbia 
follow in the 
order named. 
Grass, 8 or 10 plants 
in each formalin 
plat; other spe- 
cies rare. 
Grass, 3 plants. 
None. 
Mollugo, common; 
grass, Portulaca, 
Amaranthus,and 
Euphorbia fol- 
low in the order 
named. 
Grass, a dozen or 
more plants; Por- 
tulaca and Eu- 
phorbia still less 
abundant. 
Grass, 16 plants; 
Portulaca, 2; Eu- 
phorbia, 2. 
Grass, 4 plants; 
Portulaca, 2; 
Mollugo, 1. 
Grass, 6 plants; 
Portulaca, 2. 
Grass, 4 plants; un- 
known, 1. 
Grass, 3 plants. 
None. 
Do. 
Do. 
Do. 
Grass abundant, 
followed by Mol- 
lugo, Euphorbia, 
Portulaca, and 
Amaranthus in 
the order named. 
Grass, 14 plants; 
Mollugo, 3 or 4. 
Grass, 11 plants; 
Mollugo and Eu- 
phorbia, several 
plants around 
edge of plat. 
None. 
Do. 
Do. 
1 Watered daily, 0.3 to 0.4 inch. 
s Plats covered tightly for 3 days after treatment to prevent too early evaporation. 
3 Watered daily; dry at surface on date of examination . 
4 This plat became extra dry at time of germination. 
5 Watered daily, 0.15 to 0.3 inch, until 3 days before germination. Surface dry at that time; watering 
done twice daily thereafter. 
I 
