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.S0 

 .25 



.281 

 .25 



Pints 

 4 



None. 



Slight or none. 



D 



F 



Series 518 » (6 

 checks). 



Hydrochloric 



acid. 

 Nitric acid 



Sulphuric acid 



do 



None 



.562 

 .562 



.188 

 .281 



( 2 ) 



None. 



.do. 

 .do. 



Formalin * . 



.do. 



.do. 



Mercuric chlo- 



rid. 



....do 



Sodium chlo- 



rid. 



Mercuric chlo- 



rid. 

 Air -slaked 



lime. 



Zincchlorid... 



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 



17 



None 



....do 



....do 



....do 



....do 



....do 



....do 



Slight, or none 



None 



....do 



....do 



Grass, 15 to 20 

 plants; Euphor- 

 bia and Portu- 

 laca, 1 or 2 each. 



Same abundance 

 as in checks, but 

 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- 

 ranthus, 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 near est checks , 

 \ but larger pro- 

 portion of grass 

 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. 



s A little at a margin missed m 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. 



