SULPHUR DIOXIDE AS AN INSECTICIDE. 



151 



United States Department of Agriculture, 



Bureau of Plant Industry, 

 Botanical Investigations and Experiments, Seed Laboratory, 



Washington, D. C, Octobers, 1905. 



Final report of germination test of seed received September 22, 1905. 



Test 

 number. 



31578 

 34574 

 34575 

 34576 

 34577 

 34578 

 34579 

 34580 

 34581 

 34582 

 31583 

 34584 

 34585 

 34586 

 34587 

 345SS 



Sender's 

 mark. 



12001 

 1 

 2 



11760 

 1 

 2 



11215 



Name of seed. 



Wheat, nonf umigated 



Wheat, 1 hour at lh per cent 



Wheat, 2 hours at 10 per cent 



Wheat, 3 hours at 5 per cent 



Rye, nonfumigated 



Rye, 1 hour at 1h per cent 



Rye, 2 hours at 10 per cent 



Rye, 3 hours at 5 per cent 



Timothy, nonfumigated 



Timothy, 1 hour at 7^ per cent 



Timothy, 2 hours at 10 per cent. . . 



Cotton, 2 hours at 10 per cent 



Garden pea, nonfumigated 



Garden pea, 1 hour at 7| per cent. 

 Garden pea, 2 hours at 10 per cent 

 Garden pea, 3 hours at 5 per cent. 



Dura- 

 tion of 

 test in 

 days. 



Germina- 

 tion, per 

 cent. 



91 













 69.5 













 88.5 















99.5 

 89.5 

 86.5 

 86.5 



The actual value is the percentage of pure seed that will germinate. This is obtained by multiply- 

 ing the percentage of pure seed by the percentage of total germination. 

 Remarks.— Exposed to S0 2 gas as above. 



E. Brown, 

 Botanist in Charge of Seed Laboratory. 



United States Department of Agriculture, 



Bureau of Plant Industry, 

 Botanical Investigations and Experiments, Seed Laboratory, 



Washington, D. C, October 3, 1905. 



Final report of germination test of seed received September 22, 1905. 



Test 



Sender's 



number. 



mark. 



34589 



12862 



34590 



1 



34591 



2 



34592 



3 



34593 



11722 



34594 



1 



34595 



2 



34596 



3 



34597 



12023 



34598 



1 



31599 



2 



34600 



3 



34601 



11267 



34602 



1 



34603 



2 



34604 



3 



Name of seed. 



Germina- 

 tion, per 



Rice, nonfumigated 



Rice, 1 hour, at H per cent . . . 

 Rice, 2 hours, at 10 per cent . . 

 Rice, 3 hours, at 5 per cent . . . 



Oats, nonfumigated 



Oats, 1 hour, at 7£ per cent . . . 

 Oats, 2 hours, at 10 per cent . . 

 Oats, 3 hours, at 5 per cent . . . 



Barley, nonfumigated 



Barley, 1 hour, at 7£ per cent. 

 Barley, 2 hours, at 10 per cent 

 Barley, 3 hours, at 5 per cent . 



Flax, "nonfumigated 



Flax, 1 hour, at 1\ per cent . . . 

 Flax, 2 hours, at 10 per cent . . 

 Flax, 3 hours, at 5 per cent . . . 



96 













 52 













 99.5 

 76.5 

 70 



6 

 82 



2?. 5 

 25 



2 



The actual value is the percentage of pure seed that will germinate. This is obtained by multi- 

 plying the percentage of pure seed by the percentage of total germination. 

 Remarks.— Exposed to S0 2 gas as above. 



E. Brown, 



Botanist in Charge of Seed Laboratory. 



