FUMIGATION AGAINST GKAIN 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 



8. 

 gran- 

 arms 



Tribo- 

 lium 



Plodia 









Chlorides— Con. 

 126 



°C. 

 30.0 

 24.0 

 26.0 

 26.0 

 24.0 

 24.0 

 23.0 

 24.5 

 25.0 

 25.0 

 26.0 

 25.0 

 25.5 

 28.5 

 29.5 

 30.0 

 30.0 

 30.0 

 28.5 

 28.0 

 29.0 

 29.0 

 30.0 

 30.0 

 31.0 

 30.0 

 30.0 

 30.0 

 30.0 

 30.0 

 30.0 

 26.0 

 26.0 

 26.0 

 26.0 

 32.0 

 29.0 

 30.0 

 30.0 

 26.0 

 26.0 

 26.0 

 27.0 

 27.0 

 27.0 

 27.0 

 28.5 

 26.0 

 26.0 

 26.0 

 26.0 

 30.0 

 30.0 

 29.5 

 30.5 

 28.5 

 30.5 

 26.0 

 30.0 

 30.0 

 30.0 



24.0 

 24.0 

 24.0 



24. 5 



23. 

 23.0 

 30.5 



25. 

 25. 



24. 5 

 21.5 



24.0 



Trichloroethane 



0.22 



2.80 



1.60 



.80 



.40 



.20 



.40 



.20 



.80 



.80 



.50 



1.10 



1.10 



1.00 



1.10 



1.10 



.46 



.23 



10.00 



12.00 



6.00 



3.00 



1.40 



.73 



10.00 



10.00 



5.00 



2.10 



1.05 



5.00 



2.50 



2.60 



1.30 



.60 



.30 



9.02 



28.00 



16.80 



6.90 



6.10 



2.80 



1.20 



1.10 



1.00 



.70 



.70 



18.00 



1.00 



.25 



.10 



.50 



2.00 



1.00 



2.00 



2.00 



7.70 



.60 



1.00 



1.00 



2.00 



1.00 



14.30 

 7.20 

 3.40 

 1.90 

 2.20 

 1.90 

 .002 



1.6] 

 1.64 



.79 

 .43 

 . 36 



0.82 



10.41 



5.95 



2.97 



1.49 



.74 



1.49 



.74 



2.97 



2.97 



1.86 



4.09 



4.09 



4.68 



5.15 



5.15 



2.15 



1.08 



27.58 



33.10 



16.55 



8.27 



3.86 



2.01 



36.62 



36.62 



18.31 



7.69 



3.85 



18.31 



9.16 



12.02 



6.01 



2.77 



1.39 



24.37 



75.65 



45.39 



18.64 



19.21 



8.82 



3.78 



3.46 



3.15 



2.20 



2.20 



39.40 



3.14 



.78 



.31 



1.57 



6.27 



3.14 



6.27 



6.27 



24.15 



2.46 



4.10 



4.10 



8.19 



4.10 



38.29 

 19.28 

 9. 10 

 5.09 

 5.89 

 5.09 

 .01 



8.26 

 7.90 



4. 05 

 2.21 

 1.85 



P.ct. 







100 



100 



100 







100 











50 

 100 



50 

 100 

 100 



60 

 100 

 100 



60 



70 

 100 

 100 

 100 



95 

 



90 

 100 

 100 



10 



100 







65 



50 

 100 



50 



100 

 100 

 100 

 60 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 

 100 

 100 



100 

 100 

 75 

 90 

 100 

 



85 

 100 

 100 



100 

 100 

 100 

 100 





 100 







100 

 100 

 100 



II 

 



P.ct. 

 







100 



60 



50 



50 



100 



100 



100 



50 







20 



100 



100 







100 







60 



15 



100 















100 



100 



100 











P.ct. 



70 



100 



100 



100 







100 











50 



75 



50 



100 



100 







100 



100 



100 



100 



100 



100 



100 



100 



100 



100 



100 



100 







100 







100 



80 



100 



100 











100 



100 



100 



90 



100 



100 



100 



70 



80 



60 







65 



P.ct. 

 



497... 



do 





499 



do 





501 



!!"IdoEJOI"III"C""II 





503 





505 . 





512,513 



do 





516 



Z." doi'SY.V.'.'l'." '"."". 





526 





527 





528,529 



-!-~~do--"-"~"--I--I---" 





530 





531 



do 





66 - 



s- Tetrachloroethane 



do 



do 



50 



78 



100 



96 



90 



98 . 



w".d<rsfi"izii"i".'." 



90 



100 



60 



87 



100 



113 



do 



100 



116 



do 



100 



119 



do 



85 



122 



do 



25 



125. 



do 



20 



84 



100 



95 



do 



100 



97 



do 



10 



99 



....do.... 



100 



102 



do 



70 



146 



do 



20 



150 



do _ 



Tetrachloroethylene 



do 







574 





575 





576 



" "'.do'.'.".'.'. "'"'.'.'. 





577 





55 



Acetylene dichloride... .. 

 . .do . 



80 



141 



100 



145 



do 



100 



149 



. .do ... 







536 



Propylene dichloride. 



.do . 





537 





538 



. do ... 





556 



do 





557 



do 





558 



. do . 





559 



do 





92 





50 



1 



M onochloro benzene 



. .do ... 





2 .". . 





 



100 

 50 

 32 

 50 



100 







50 



75 



100 

 50 







100 



100 



100 











100 



80 



100 

 





3 



do .. 







4. . .. 



100 



8 



100 



9 



do 



100 



15 



. do 



20 



16 



.do 



20 



65 



do.. 



o-Dichlorobenzene 



p-Dichlorobenzene 



do 



95 



138 







6 . 



50 



10 



100 



7 



o and p-Dichlorobenzene. 

 do 





13 



100 

 100 

 100 





 100 

 25 







100 



100 



100 











100 



Fluorides: 



465 





407 



do 





469 



do 



. do... 





471 





474.... 



do 



...do 





47fi 





m 



DiUuorodiphenyl 



10 



[odidks: 



302 







303.... 



do. 



do 



do.. 



do 





316 





337 



340 





