FUMIGATION AGAINST GRAIN WEEVILS 



Table 1. — Results of fumigation tests on weevils in glass flasks at room temperature 

 (21° to 32° C.)— Continued 





Tem- 

 pera- 

 ture 



Fumigant 



Concentration 

 of fumigant 



Weevils killed after exposure 

 for 24 hours 



Test No. 



Molar 

 per- 

 cent- 

 age 



Pounds 

 per 

 1,000 



cu. ft. 



S. 

 oryza 



s. 



gran- 

 anus 



Tribo- 

 lium 



Plodia 



Nitrites: 



413A 



°C. 

 24.0 

 24.0 

 24.0 

 25.0 

 25.0 

 25.0 

 24.0 

 24.0 

 24.0 

 26.0 

 26.0 

 24.5 

 24.0 

 24.0 

 24.0 

 24.0 

 26.0 

 24.0 

 25.0 

 25.0 

 23.0 

 24.0 

 24.0 



23.5 

 25.0 

 26.5 

 21.5 

 24.0 

 28.5 

 31.0 

 30.0 

 31.0 

 28.5 



24.0 

 24.0 

 26.0 

 25.0 

 23.5 

 24.0 

 23. 

 26.0 

 26.0 

 26.0 

 26.0 

 27.0 

 25.5 

 25.5 

 24.0 

 24.0 

 29.5 

 29.0 

 30.0 

 30.0 

 30.5 

 28.5 



30.0 

 31.0 

 29.0 

 29.0 

 29.0 

 30.5 



23.5 

 24.5 

 24.5 

 24 5 

 24.5 

 25. 5 

 27.0 

 29. 

 32.0 





9.10 



4.30 



2.20 



1.60 



1.10 



1.00 



.60 



.60 



.30 



4.70 



4.84 



2.36 



1.46 



1.02 



1.13 



1.40 



1.10 



.80 



1.20 



.80 



.70 



.60 



.80 



4.35 



4.59 

 3.57 

 1.27 

 1.03 

 .10 

 .12 

 .12 

 .28 

 .10 



20.60 



11.80 



5.80 



2.60 



1.10 



.90 



.50 



.80 



.50 



10.20 



5.30 



2.80 



1.30 



.60 



.30 



.20 



1.89 



.13 



.15 



.03 



.07 



.016 



1.69 

 .84 

 .17 

 .39 

 .83 

 .002 



100.00 

 100.00 

 60.00 

 33.00 

 60.00 

 60.00 

 50.00 

 6.00 

 4.50 



26.15 

 12.36 

 6.32 

 4.60 

 3.16 

 2.87 

 1.72 

 1.72 

 .86 

 15.34 

 15.80 

 7.70 

 4.77 

 3.33 

 3.69 

 4.57 

 3.59 

 2.61 

 3.92 

 2.61 

 2.28 

 1.96 

 2.61 



7.40 



7.81 

 6.07 

 2.16 

 1.75 

 .34 

 .41 

 .53 

 1.31 

 .48 



41.98 



24.04 



11.82 



5.30 



2.24 



1.83 



1.02 



1.63 



1.02 



20.78 



10.80 



5.71 



2.65 



1.22 



.61 



.41 



4.90 



.39 



.51 



.18 



.29 



.06 



3.72 



1.85 

 .37 

 .86 



1.83 

 .008 



122.64 

 122.64 

 61.32 

 40.47 

 61.32 

 01.32 

 61.32 

 16.58 

 14.92 



P. ct. 

 100 



90 

 100 

 100 

 100 

 100 

 100 

 100 



50 

 100 

 100 

 100 

 100 

 100 

 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 



100 

 100 

 100 

 

 

 

 

 

 

 



100 



100 



100 



100 



100 



100 



100 



50 



50 



100 



100 



100 



100 



100 



50 































100 

 100 





 10 

 100 







100 

 65 

 100 

 

 100 

 100 

 100 

 100 

 100 



P.ct. 



100 

 100 

 100 

 100 



50 







100 



75 

 100 



100 

 100 

 100 

 

 

 

 

 

 

 





 

 

 

 

 



100 



100 







5 



100 







100 



1(10 



P. ct. 

 100 



90 

 100 

 100 

 100 

 100 

 100 



66 

 8 

 100 

 100 

 100 

 100 

 100 

 

 100 

 100 

 100 

 100 

 100 



50 

 100 

 100 



100 

 100 

 100 

 

 

 

 

 

 

 



100 



100 



100 



100 



100 



100 



100 



50 



100 



100 



100 



100 



100 



100 



































100 

 100 

 

 10 

 75 

 



100 



40 



25 







100 











100 



100 



P.ct. 



415A 



do 





417 



do 





434 



do 





435 



~--do---""---"-" 





436 





442... 



do.... 





443. . 



do 





444 



do 





279 







281 



. .do 





318 



...do 





327 



™~do ~I"-~I~-IIII"III 





332 





354 . 



...do 





368 



. .do 





370 



do 





384 



r~"do~""i"-"---.-i-i-i 





399. 





400 



.do 





411 



-"""do"""""""""-!!" 





413 





415 



do 





NlTRO compounds: 

 298 





300 



. ..do 





323 



..do 





336 



.do 





339. 



do 





32 





6 



49... 



2>-Chloronitrobenzene 







82. 







85 







86. 



a -Nitronaphthalene 







Amines: 



496 





498... 



do 





500- 



...do 





502. . 



...do 





504... 



. .do 





509 . 



..do 





511. . 



do 





534. 



do... 





535. . 



do 





482 







485. . 



do 





488 



....do 





491. 



do 





493 



...do 





508 



...do. 





510 



..do .- 





43 









47 









66 









67 



Etbylbenzylaniline 



Acetphenylenediamine 







62 







91.. 







Miscellaneous ni- 

 trogenous com- 

 pounds: 

 48 





100 



76 . 



do -- 



100 



105... 



do... 







108. 



. do 



20 



112... 



...do 



65 



61... ...'. 



Hexamethylenetetrarnine. . 







Inorganic com- 

 pounds: 



477A 





478A . . . 



do 





479.. 



...do 





480. 



...do 





481... 



...do 





495... 



...do 





622... 



...do 





41... 



Thlonyl chloride 



100 



74. 



. .do 



100 









15685°— 25f- 



