24 BULLETIN 169, U. 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 (7 

 checks). 



N 



P 



M 



A 



D 



G 



H 



L 



U 



S 



Series 5123 (5 

 cheeks). 



P 



M 



J 



Series 514 6 (5 

 checks. 



None. 



Formalin 2 



....do 



do 



..:.do 



do 



do 



do 



do 



Sulphuric acid 



....do 



None 



Hydrochloric 

 acid. 



.do. 



.do. 



....do 



Nitric acid . 



....do 



Sulphuric 

 acid. 4 



do 



do 



do 



None 



Hydrochlor i c 



acid. 

 do 



Sulphuric acid 



do 



do 



Pints. 



0.375 

 .375 

 .562 

 .75 

 .75 

 .75 

 1.00 

 1.00 

 .25 

 .375 



3 



2 



4.5 



3 



3 



3 



8 



4 



2 



2 



43-51. 



43-51. 

 43-51. 



None detected. 



Moderate. 

 do... 



.75 

 .75 



1.00 



.281 



.375 



4 



3 



4 

 3 



4 . 

 5.5 

 2 



None. 



Very slight 



Slight to moderate. 



....do 



Moderate 



Very slight. . 

 Very heavy. 



Heavy . . . 

 Moderate . 

 ....do... 



.75 

 .75 



None. . 

 Slight. 



Heavy; J 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 

 moreplants; 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, 

 s Watered daily; dry at surface on date of examination . 

 4 This plat became extra dry at time of germination. 



6 Watered daily, 0.15 to 0.3 inch, until 3 days before germination. Surface dry at that time; watering 

 done twice daily thereafter. 



