8 BULLETIN 1813, “De: S. DEPARTMENT OF AGRICULTURE 
TaB Le 1.—Results of fumigation tests on weevils in glass flasks at room temperature 
(21° to 32° C.)\—Continued 
for 24 hours 
S : 
° Tribo- 
gran- F 
arius Dum 
P. ct er 
100 100 
100 100 
100 100 
100 100 
100 100 
100 100 
100 100 
100 100 
35 70 
0 0 
0 0 
0 0 
0 0 
100 100 
100 100 
100 100 
100 100 
100 100 
20 80 
0 0 
0 0 
100 100 
100 100 
0 100 
100 100 
0 100 
100 100 
0 50 
0 100 
100 100 
100 100 
100 100 
10 80 
80 80 
100 100 
100 100 
0 100 
100 100 
100 100 
100 100 
100 100 
100 100 
100 100 
0 0 
20 30 
100 100 
100 50 
0 100 
100 50 
0 0 
peas eo: 100 
100 100 
100 100 
100 100 
100 100 
0 0 
0 0 
100 25 
0 0 
100 100 
100 100 
0 0 
100 100 
0 0 
100 100 
SoM i 0 
LP h SL 100 
Pt BS Er 30 
Bee 3h vite 0 
0 0 
ED SE $0 
. om 344 0 
E eens 0 
+ fon eed 0 
LY See 0 
Weevils killed after exposure 
Concentration 
of fumigant 
Tem- ass SSS 
Test No. pera- Fumigant Molar | Pounds 
ture per- per 
cent- 1,000 
age cu. ft. 
SULPHUR COM- 
POUNDS: Gi 
P52 ee eee 28.0 | Carbon disulphide--_-____ 46.00 | 97.59 
NER e be 2 Se ee 2950 r= O24 Ss LAS et ee 24.70 | 52.40 
1 4 ats IS oT 30:0) ees Go eee! Sas eee 12.30 |} 26.10 
1 BLY, Sean Se ge a 30: Oe posses CQ Sate. hae se ee 6.40 | 13. 58 
1 of Sess Sees Be” 30) Qe. deste 2 3. 00 6. 36 
64.2 eS 21s ORS = GQete tics LSM 273 3 3. 30 7.00 
165 en eo 2: O ees A=. a2. Ue ee 2. 50 5. 30 
GS See ee 21s & FSSE eS GOsbaeae Sole! << eae 1.10 2. 33 
174 | WER Sts Or eS 26: Oe = COC re cae i a ee 1. 00 Pin die 
11 A Sa ot) ee 26: QO) 22 50 (i Se A RT - 50 1. 06 
3 7 7 ee see eo Qe doef: 6 Ss. ae 47 1.00 
igs s a 21-0 [z22-- doe. te Sr a . 50 1. 06 
£7 7. Se aS eae ee el ao) We la oe CORE iae sa sab a3 
Os eor Wes a 28.5 | Ethyl mercaptan___---____ 19.00 | 32.89 
0 Cask! AS een re 31.5 | m-Butyl mercaptan -______ 3. 00 7.54 
(See th een S220 fete. do Se eal Me. 2. 00 5. 03 
52) i ASPET Wl oes nei do... eee Ge Senay, 
B54 I a a 25h Pee dea i Se 2. 30 5. 78 
1 Uy AS | ee eed Sea 26:0) Gos i se . 90 2. 26 
ee LS eee 2655 ee dQ 28s ha . 30 Asia 
1s ees ee ee Zi Ores (65 (OR ei ea -10 225 
PiGEURE Pe 26.0 |} Methyl sulphide_____-___- 53.80 | 93.14 
PPL AS B), SIRE at PEE] il eS dosiesie 1 .  ae 20.98} 36.32 
DAL Se) eee Ape 255 On eeee 2 dose te ee 9.45 16. 36 
Agr So es 25: Qo ee (6 (0 oe Fe See 10. 44 18. 07 
DOG. SRR es Fa GY a ee Goes...) N= = 3. See 9.75 | 16.88 
7 ay ae ee 24.0 Peo: (6 (0 ee ee 9.49 16. 43 
DOSS FRG Le ee P| wee OOo ep LON =) a ae 5. 00 8. 66 
2652 See eee 20: Qi pee Ges. 222 2 Ee a 12.87 | 22. 28 
266 = Sek Ue Es Oi ee GOS 8 2 SEE 2 ee 11. 54 19. 98 
YA sie on at sete 26.0 | Ethyl sulphide_-.-_-___-_. 4.91 | 12.34 
D2A SABES tS ZES Oo pee sc 11 SS ce SEE 2. 92 7. 34 
256 2) Some 25203 peers (3 (3 poy js RS eS Me 1. 50 eet 
DAs he ee ay ey een GO helo: ee ee 1.72 4.32 
261) 28 NURS oo eS AK nee GQ seers = 8 Soe et se 3. 65 9.17 
2620S ee 20 One ae pe wi ee 3. 72 9. 35 
264 CSE Be 2520) ee =O ses ee. =. US 2. 34 5. 88 
21g Ves aes 26.0 Methyl thiocyanate-_______ 1. 84 3. 75 
DAG SEN A 5 of SS DAN Qi Be aes COQ: See es . 78 1.59 
DE PE SE 2S. A Mi 25 Oe ose ell. 15.3) .36 .73 
ZAG 2 SSeS 26: Qe (0 (00s IS eee oe ee . 20 41 
253= 2 Se + Pa pe 6 (Ot = . 20 -41 
254-5 a 70s ¢| a ee 3 (Ts ae ee 14 29 
PAS ep eee 2650 he Gos btn 2 ee . 09 18 
2632232252 eee 260) (es do Mee.. 32. ee -10 . 20 
DY EO Soares 26.0) Ethyl thiocyanate_________ 1. 04 2.53 
DD bees is ZA) GOs rk. ee . 46 1 12 
7 2d ee ae 23. 05 Qse it ee - 46 iftZ 
Dolstra es 242 Oi ee doses. ss = .19 . 46 
73, ee AAG nee 0223). 2.55 >. See se ls 1.72 
AOD <a eo 2A O) eee Comet bs eh ae . 80 1.94 
ied se od 31.0 | Allyl isothiocyanate______- 1.14 3.15 
Ci ee a ee ge 7d NET ape Got et Se .70 1.93 
ay Se eee 29-0) reas dost. SS. ee . 34 . 94 
1S (as eee ees 29: 0 [e222 do se Se . 62 1.71 
oO eat Be 28.5 | Cyanogen sulphide________ .10 S78: 
Oh ant Oe 28.5. | Mereaptol—-2 = ===> eeee .16 1.16 
De ed ay Sh aN 30.5} Perchloromethyl mer- 
Captoless= 2 So" ee 1. 00 5.18 
QOLa) MF 28.5 | p-Toluenesulphochloride _- 215 . 80 
NITRILES AND ISO- 
NITRILES: 
S052. 2 25.0 |} Acetonitrile. 2. .__.. 5a 11.60! 13.27 
BIOL eee es 25. Oi feseee G0: 222 5 =. Le 12.13 13. 87 
S423: Atco. bows ZA QO Jeo ce GO 2k 4s. ee 3.47 3. 97 
DAG 2st 2s die 7-7 Sate (aes doateiia i) Ces a 4. 97 5. 68 
SEP E Ses 2 des 26; 5 eee dese). 4S ae 3. 90 4. 46 
Sioa 2g 26: Fie ee do Met 3 4 See 5. 70 6. 52 
ASO. AA Be 1 ae 25.0 | Propiontirile: = =... 4a 1.30 1.99 
AVN See 8k 24.0} n-Valeronitrile ___.________ 1.10 2255 
416 = SES 2. bed 24,10 pees (6 () aes ee . 60 1.39 
ATG A NORE UE RS 24.0 Peres Of sie? + ee . 30 . 69 
Boe or Med Ta RS 30.0 | Phenylisonitrile___________ 3 . 34 
OAS Ss Ae ed: 25.0 | Phenylacetonitrile_______- -10 33 
AD fat Meta < 4, ie 20:0) OS. 52 ve . 03 . 10 
ADO aUAAT ALY 2G eee do Seas. Sa . 02 07 
yy ee ee 25:'O) ieee GOs AS) . 07 23 
ABS. 05 Woete ty Ah sols PA (aa tee does 4.55 Fin ae . 03 .10 
[ge eee 
$6 ty Deedee 
Aes 
ma eete-i 
