BULLETIN 1313, IT. S. DEPARTMENT OF AGRICULTURE 



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. 



oryza 



s. 



gran- 

 arius 



Tribo- 

 lium 



Plodia 



Bromides: 

 50 . . 



°C. 

 31.0 

 23.0 

 25.5 

 25.0 

 25.5 

 24.0 

 24.0 

 24.0 

 25.0 

 27.0 

 28.0 

 28.0 

 24.0 

 24.0 

 24.0 

 23.0 

 25.5 

 25.0 

 25.5 

 24.0 

 24.0 

 26.0 

 26.0 

 25.0 

 25.0 

 24.5 

 24.0 

 24.0 

 24.0 

 24.0 

 24.0 

 26.0 

 26.0 

 25.0 

 26.0 

 26.0 

 25.0 

 25.0 

 24.5 

 24.0 

 32.0 

 23.0 

 23.5 

 30.0 



25.0 

 25.0 

 25.0 

 25.0 

 26.0 

 28.0 

 28.0 

 28.0 

 28.0 

 31.0 

 28.5 

 30.0 

 28.5 

 29.0 

 29.0 

 30.0 

 23.0 

 24.0 

 24.0 

 23.5 

 28.5 

 25.5 

 26.0 

 26.5 

 27.0 

 28.5 

 28.0 

 29.0 

 30.0 

 30.0 





0.94 



53.50 



16.80 



14.20 



8.80 



12.70 



8.00 



7.60 



4.00 



4.30 



3.30 



2.90 



1.70 



1.20 



.70 



1.30 



.50 



.20 



.30 



.30 



.20 



12.79 



13.84 



5.50 



7.26 



5.54 



4.00 



4.01 



4.90 



4.10 



2.20 



15.30 



8.00 



3.90 



5.27 



5.30 



2.64 



2.56 



1.63 



1.09 



.77 



.56 



.55 



.12 



39.50 



8.10 



16.80 



14.20 



4.40 



3.40 



2.20 



1.20 



1.10 



20.00 



2.30 



15.00 



3.20 



7.00 



13.90 



2.00 



10.05 



12.21 



10.31 



6.86 



20.00 



10.20 



10.90 



2.00 



1.30 



4.00 



3.80 



1.90 



.90 



.48 



6.62 



162. 48 



51.02 



43.13 



26.73 



38.57 



24.30 



23.08 



12.15 



13.06 



10.02 



8.81 



5.16 



3.64 



2.13 



6.81 



2.62 



1.05 



1.57 



1.57 



1.05 



43.84 



47.44 



18.85 



24.89 



18.99 



13.71 



13.75 



16.80 



14.05 



7.54 



51.59 



26.97 



13.15 



20.12 



20.24 



10.08 



9.78 



6.22 



4.16 



3.37 



2.45 



2.41 



.57 



93.51 



19.18 



39.77 



33.62 



10.42 



8.05 



5.21 



2.84 



2.60 



66.55 



7.65 



49.91 



10.65 



23.29 



46.25 



8.58 



43.09 



52.35 



44.21 



29.41 



55.16 



28.13 



30.06 



5.52 



3.59 



14.87 



14.13 



7.06 



3.35 



1.78 



p. a. 



100 

 100 

 100 

 100 





 100 

 100 

 100 

 100 

 100 

 100 

 100 





 100 





 100 

 100 

 100 





 75 

 100 

 100 

 100 

 100 

 100 

 100 

 100 





 100 

 100 





 100 

 100 

 100 

 100 

 100 

 100 

 100 

 80 





 20 















100 

 

 100 

 100 

 100 



p.ct. 



80 

 100 

 100 

 100 

 

 100 

 100 



100 

 100 

 30 





 50 





 100 

 100 

 100 

 100 

 100 

 50 





 100 

 100 







100 



25 



100 



100 



25 



25 























P.ct. 



90 



100 



100 



100 







100 



100 



100 



100 



100 



100 



100 















100 



100 



80 



80 



100 



80 



100 



100 



100 



100 



100 



100 







100 



100 







100 



100 



100 



100 



100 



100 



100 



100 



15 



















100 



100 



100 



100 



100 





















 100 

 100 

 100 



100 



100 

 100 

 100 

 100 

 100 

 100 

 100 

 20 

 75 

 100 

 100 

 100 

 

 100 



P.ct. 

 10 



365 







373 



do 





376 



... do 





378 



. do 





380 



. do 





382 



... do 





404 



. do 





405 



. do 





410 . 



do 





112 



... do 





414... 



. . do 





419 



do 





420 



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





421 





366 







374 



... do 





377 



. do 





379 



do 



... do 





381 





383 



. do 





278 







280 



do 





308 



. do 





313 



. do 





326 



.. do 





331 



. do 





353 



. do 





367 



. do 





369 



"do ~~I-~-~~^-.-~~- 





385 





483 







486 



do 





489 



do 





275 





277 



do 





307 



. do 





312 



do 





325 



do 





330 



do 





54 









295 



do 



.. do 





297 





58 





20 



Chlorides : 



518 



Methylene chloride 



do 



. do 





520 





524 





525 



.... do 





541 



.. do 





580 



. . do 





581 



. do 





582 



... do 











583 



. do 





19 





100 







100 



95 



100 



100 







100 



100 



100 



100 



100 



100 



100 











100 



100 



100 



95 







100 







100 



45 



100 



100 







100 



100 



100 



100 



100 



100 



100 











100 



100 



90 











100 



69 



do 







79 



do 



100 



104 



~—"_do— -.---.— -.- — --. 



50 



106 



80 



109 



do.... 



100 



11 



Carbon tetrachloride 



do 







239 





240 



do 



...do 





249 





250 



do—. 





89 



153 



E thylidene chloride 



do 



100 

 100 



156 



~~— do..— .---.--I.— ".. 



100 



159 



10 



162 



do 



10 



88 





100 



114 



do 



do 



100 



117 



65 



120 



v^v.aoSSSSSSs^\.:.v .vs.'' 



65 



123 



10 



