FUMIGATION AGAINST GRAIN WEEVILS a 
TABLE 1.—Resulis of fumigation tests on weevils in glass flasks at room temperature 
(21° to 32° C.)—Continued 
Concentration | Weevils killed after exposure 
of fumigant for 24 hours 
Tem- SSS 
Test No. Dery Fumigant Molar | Pounds Ee sg A 
ure er- per b : ribo- - 
ent 1,000 | oryza | 972" | jium | Plodia 
age | cu.ft. arius 
EstERS—Con. KOS iP Sct Pct PERCE ect 
SOS a ape ee oe 0| Ethyl formate__.__.---___- (a: 9 el en 2} 100 100 LOOM See cee 
a SY (pak: apse Be AS Qh aes 2. lp we Se ee 4.89 10. 09 100 100 1006) 2285. 2= 
Oe a ee a Oi e24 CO saee er Ee ad 3. 71 7. 66 100 100 100:)|2aee es 
Poh ] seca ed ae Se 2550) |pe= C6 (0 gs ree ee 1.80 3. 72 100 100 100) te 
Pa} = ee aa 2040s eae (ee ae 60 1, 24 100 100 100; sas 
ANGE Aes oh tee 2090) |aeae= Oteen at 2 Pee) 1. 30 2. 68 TOOW SE ef TOOn <2 ae =~ S 
AQ fs ee 2550 ae (OV cee ay NI ey te ee ee 1.10 2. 27 LOOR EE eS Dy ee eee 
ARE nat oS tlezos ON OG) es eee - 90 1. 86 LOO3 se Boe LOO} See. a 
ANIA a 73}, (0) |e Cts eee eae ae 1.10 2. 20 100 2 36 ose 1003/2282 = 
ANDINA ADD = 2 PAN (Oy ea GOS ee ie a - 80 1.65 LOORhE Sakae 100: (2s 
dot ieee Mond GAS Dh] OR Ses (ee ee 40 . 83 Qe ee pise, OF take 
see ae as PB3(\i|| io (oye ree Soe ee ae 60 1. 24 LOO) p= ae See One ser Ss 
AIG ADR ee ee 205 OQ) ee OT Se Lee ee ae 50 1. 03 (0 )e) ea Ye a (6) 5 a aoe se 
AQAR TE hee soa 26.0 | Isopropyl] formate 15.50 | 38.05 LOGE 82 5 op LOO} | ata 
AC fae eens: ate 2650) |e OS ee 8.20} 20.13 100} | See oe 100) Dae 
BOOS he EE ge 25) Oe 0 aes Oe a Ee 3. 90 9. 57 LOOSE fo 100) 2ea2 = 33 
AQDES eee bap ae PAR Fas] hee GO sess rae 2. 00 4,91 ‘LOOT Efe SOs 100) |Taae 
AQg Tee 74a), ty || (GS eR 5G ae ea 1.00 2. 45 SOMA ae (i | Bakser = 
ty Le a ee Bese CARON Re OVO ieee OS Sea pe 1. 20 2.95 LOOS |e eet JOO} | Paes 
SUAS Se Lo Pas (0) |e Goma A le . 90 rival TOO) Ee 3e 100"): Shes 
Fe a NS Ue Soe 2655) nee GOSS ae ee ee 1.10 2.70 LOO Ee 45 2 L003) 28422 5-= 
[58 eae PE Bo PAD ays | ae C0) sa eae eee . 90 PAPA LOOns e822 100%] Saas 
Hv DAME ESS cee ae 26H Ogee OES eres Or ie ee eee . 80 1. 96 LOO' pees 80) Sue ore 
i. & gee Sa ee 26;,.0:|2ee: 2 GO nee ae yee ok . 50 1. 23 100) fea Op eeeew Se 
POON e pee 27.0} Methyl cyano formate_-__- . 20 47 16 0 100 100 
AK oy (oe Cees eee Papuan) (Sarees (6 (aye eee Pane see et Sees ae ~o2 76 88 90 100 100 
1G)! soe ee inane a Wer) \ oes 2 (6 (oS eee eee . 08 19 24 55 15 95 
DER wee P(A V a pe G\0) See ee ee . 90 2. 13 100 100 100 100 
Ly oes ey eee ee Periods i Ves (Xenon ae ee ae . 68 1.61 100 100 100 100 
B47 (ale a ree PA lstayy) | See (OSE ee ee a - 40 . 95 95 90 100 100 
WS stipe oe 74 na een OSs > Ee . 30 eek 50 50 100 100 
Bae Ce ee ane 27.5 | n-Propyl acetate___-_-__-_- 3. 50 9. 96 100 100 100 100 
7 (| SR ace eee SCOT ess (GVe\ eee at oe eee 2. 50 Cea 100 100 100 100 
1 baa Jed po ieee sae Pasay (ESC 0 a Se ee 3. 70 10. 53 95 90 100 100 
i552 eee es 2650) {as GOSS aA ean Sie 1. 90 5. 41 90 50 100 100 
(oT ES ts Se eae eee PA Ol MaDe OO See a oe eee 1.00 2. 85 0 0 0 0 
1A cas a eS ae ete 30.0} m-Butyl acetate____-_-___- -76 2. 46 70 20 95 100 
732 a See Sar 26.0 | Isobutylacetate_.._-_____- 1. 68 5. 44 0 0 ee 
72. cee te ne ne 2650) eae es Vc oe es Eas Sy aa Roe 1.56 5.05 0 0 Oy (Saas. ee 
(eee cnet: 30.0 | Isoamylacetate___.__-___- 1. 50 5. 44 100 100 100 100 
1 5 eae Oe Se le OQ) Bees (sa eee oe oe es ee . 90 3. 26 100 100 100 100 
Ole see ee aes 305QF as. GOs ee a . 54 1. 96 20 50 75 85 
1 \ 15 5st eerie SOR OMe dO ees ees . 24 . 87 0 0 0 0 
ptf (ee eee 23.0 | Ethyl-n-valerate___--_-_-_- Zid 2.79 0 0 Opies ees: 
296 2S ge ee 2a See OP oe wee ee a eee . 66 2.39 0 0 0; |2228-—— 
ETHERS 
D8 AER SS ae at DASE ud (OLAS) ie | (Sea a a 4.86} 16.00 100 100 100; | See -— 52 
7 i ae ee ate Me 2020) ieee (OLS See ES a eee 4. 34 14. 29 100 100 GO es es 
5 eS ae oe 2645s pe A oe eS 2. 27 7.47 50 20 LOO: |Eaee = 
AA ee ee Dey eee O22 eA SoS eee eee Mere 5. 66 0 SOh| ees 
AD ate erase Toes De Ofte 60) eS Ee Se ee eee eee 1.70 5. 60 100 100 TOO |Eeeae = 
Lal Wane ae eae ee 270 bees (0 sn Se ee eee 1. 64 5. 40 50 20 KU 0)) (ea 
yA eee ee Pe oh Pe eae Opes ey La a 4.40] 14.49 OOH 2vat 2 Se 100: | Eeasess2 
An P/U i) | Serene Vay lee alge rs eS ea a 1.10 3. 62 TOQE|Eaae 2. 32 QOi|eee oe 
74 fe eee ae 26.0 Chproprethy! ether 2. 34 Le DAs: 100 100 100; |b ee 28 
Dak ye ee A Pe Gt Oat (eek eo Va Spee a ae DAG Le 4.98 100 100 U0) eee ee 
DA tee ete 26.0 s-Dieniorometiy! ether__.| 4.87] 15.60 100 100 100.,)2 2a. == 
DPA labs Seats pcp fe DPN a Se =(6 (ye a es SS eee 3. 89 12. 46 100 100 OQ) eas 
T2513 a ae SE EES 2ATQS oo de 2 ae Soe eee eee 1.13 3. 62 100 100 100) | s2-—~ 
71, \ STR Bee 2620} b Ss AO sk igs Sd . 62 1.99 50 50 OO inxs saute 
DG iene eb en eye Qe ees CO Mes ae eo 1.21 3. 88 100 100 TOO ep topeyece 
DEO gees ba Diya ( twee e (0 ene ee ae ee . 70 2. 24 0 0 Or seas. 
CHLOROHYDRINS 
LS y Gene ee en 25.0 Ethylene ehlorohydrin_..-| 1.40 3. 14 One ee bake: (hh | eats 2 a 
ht ee ee eee ee Zos Ouest dO Bete NS ae ee . 30 67 Qi ie eae Se (ta Roe ee 
Doo. ea Ss ies 24.5 ipichiaeukedni 5 - Seee ae 1.95 5. 03 100 100 TOO) Bete Se 
OQ EE teh SS Ot Gy 25. Oa (ee Be See eee eee 1.93 4,98 100 100 TOO} Reset 
5 ye Nake ee eae eae 26°02 222" (00S ee ee eee 1.19 3. 07 100 100 TOO! | ae 
DOLE arte med! 2420) ee =- {to et Se ee ee sho 1. 88 100 100 OOH ee ee 23 
Yee ee ea pol 1) CO are aie ede . 59 52 100 100 100) |eske 2 
BOS wees eke & Peasy eee CO seer cite ge Moe 252 - 42 1.08 100 100 LON Eat a 
OQ Re me Bak ee AS Vial meee (6 (ae oR OS A eee 41 1. 06 100 100 TOON E seek ae 
nie a eee eee 2350) ee Gps ees Ba 64 100 100 LOO" | 68 2523 
Risto Bade Cee eeeeedaes ee 2p. Ose (6 (Gee iar ee, es ee . 20 52 100 100 LOG esas, 2a 
DOO ee eS Ee PAO) (eee (6 (oye ed ee .10 26 100 100 TOO) ae 
ee (eran oe dio 20n Obie (O10): eee pe . 09 23 NOGsIE ae Se Oy seer 
BOR ee a oe St ARS )e) Se (OKop Shae ie Sante eee. . 09 23 LOO eos ee Oi eee es 
