FUMIGATION AGAINST GRAIN WEEVILS Ai | 
TABLE 2.—Formulex, molecular weights, boiling points, and lethal concentrations 
(from results in Table 1) of fumigants—Continued : 
Lethal concentration 
Mo- by (molar percentage) 
Fumi he SS SSS 
umigant Formula lecular at Ss. | Tri- 
weight Bp 8. iS fee 
s oryza | 979” bol dia 
arius | ium 
ETHERS: oC: 
IN Gat ales syns ee ras CH3CH(OC2Hs)2----=------ TASH 142! |) 102-104 22) 94538) | 4S eee 
Chloromethyl ether___| CHaClOCH3________________ 80. 510 } 55-60_____- 4222,|4,252) | 42.2) 2208 
Soe a BRP CHECIOCH Cle = MAASSG 21 | tOO-108=— asl ek tale Leder kode eee 
ether. 
CHLOROHYDRINS: 
Ethylenechlorohydrin}| CH2zCICH20H----_-_______- SOL SIOM RI 26—12 (ees ee BER eee 3 | eee 
Epi¢ehlorohydrin-_-_---- C5 ClOE 2 sees Fo ers © eo S2F Olay ble Uhien Soy 4509) 154-10) jh lO eee 
SULPHUR COMPOUNDS: 
@arbondisulphide-7: 47 CSo esis fhe a es (691250 |, 46-2522 =e HO: eee ets 1 se 180 
Ethyl mercaptan __-_-- CoH S Hee ee ae 62.118 | 34.5-35.5___|419. 0 |419. 0 |419. 0 |419.0 
n-Butyl mereaptan.._}) C4HopSH_____--_-.------_____ 90. 160 | 96-98_.___- BO eds Os 28O5 250 
Methyl] sulphide_____- (Og) aS eek pe ys. | 62.118 | 38-39____-- $0.4 | 1074+) 9:.5.)2_7_2- 
Ethyl] sulphide-___-_-- (Gis ys\ Sea he eee 90. 160 | 92-93_____- 2592s On eno |e eee 
Methyl thiocyanate__| CH3SCN____----___-_______ (lO2 1 30-131ee i. al SIA) EE SM 4 eee 
Ethylithiocyanate. 2 2|"CsHsS@ Ne 87. 123 | 146-147___-| .8] 1.0 Stef Oye 
Allyl isothiocyanate -__| C3HsNCS____...-.-.._______ cig) 22550) VS dG IS IR |S Pl a9 ed pas 
Cyanogen sulphide__-| (CN)2S.._------------_----- 84. 086 ray ee ne a ee ene ee ere 
iMereaptolet2 i be (CH3)2C(CeHsS)a_-.--------- ZEONS L372 EA ES Va ee ee ESR EL As IE eee 
Henehloromet hy! TOL POAC la SO leans ees Ae 185. 905 | 146.5-148__|______ a0) [a ee 
captol. 
p-Toluenesulphochlo- | C7H7SO2Cl.__-_..____..-___- 190! Gi. ||) 145-146) (L5i | ee eee 4,15 
ride. mm.) 
NITRILES AND _ISONI- 
TRILES: 
FNCELOIMILT Chee es O18 1 Ol a ee 41.042 | 76-82_____- 5:0)" "5: 02) =5: OF |S - 
Propionitrile_________- Catip Ni ei hyenae oie ee SOA0GSy |p OG EO Seat ae ee |b Sele ee ee 
: n-Valeronitrile_______- EG CNet ee eS Oe Soon loge eee |e dS a) jes es 
Phenylisonitrite> > %~4|) CobigN Cisse sits iS LOS AOS3i 2 1GSIGES 2S: |S Sees Sees ese ES 
Phenylacetonitrile___._| CseHsCHaCN-__-_----------- TOS | 231. Faas ae eet ee Pere eee 
NITRITES: 
n-Buty1 nitrite ______- CHHgINO7 zest Be ee hs = Le 103-100) | 77—79___=. SB apeseuies LS Opts: ee 
TIsoamy] nitrite______- Of 8 Gr Os Sa ee TUG I eS 46] 14 cite df eee pais 
INITRO COMPOUNDS: 
Nitromethane-_______- CERIN Oa ae are es oe 61.037 | 98-10T__-_-_- SEB MeN Bea ee 
Nitrobenzene-____----- CGtirINO ge sae ee ee TPA SUES el lL serene [apa ht al SO 2 Ss 
p-Chloronitrobenzene | ClCsH4NO2______-_--------- WROD DOE | Ae ke eet oly ee peck ee = Bi) a 
m-Dinitrobenzene ___.| CsHs(NO2)2_-_----_----_-__- GAGS 920 Os ers ier ae eee ce, Ee 
a-Nitronaphthalene-__| CioH7NO2--_-------- See A SMUIAP) C3046 5 es) FT AEC NEE ELE o5e 
AMINES: ; 
Diethylamine--______ (Carina Nien eee ae for liGn Oo-DO====s— Ee aes 5 ee 
n-Butylamine_-_-___--_- GUSOING Shy Reese ee eee (3/116) | (6-78-25 2— = - GY) aks 167 | 22am 
AMI inie tse eae (CALE IFIN [18 bye Se RE Re aa CES (OE ec SC i ee parabens | leone 
Methylaniline________ CoHENTHC Hest 2 se TCO Sa ays) a So yee, SE ae Be I es ae De Sk 
Dimethylaniline_____- OoligNi(CiHs) 9s 22 3 Ta Ua Yah | AS 7 cet ee ae Le ae (a 
Ethylbenzylaniline___| CsHsN(C2Hs)CH2CeHs__-_-_-| 211.219 | 285-286____|______]_-____|--_-__]__-___ 
Acetphenylenediamine} NH2CsHsNHCOCHS3.-_--_-_-- HI SOWI S69 | arsed ets 2A Serss 22 not be ee Sl ee aS 
a-Naphthylamine. is © 99 7 NiEN a: oe TASS TRAD | Uy Oe ei i) Pee ae Uy) a 
MISCELLANEOUS NITROG- 
ENOUS COMPOUNDS: 
IPTG tees er ae OVE Uap sania oS as Se aa 79. 073 | 116-118____| .83] .83} .83] .83 
Hexamethylenetetra- | CsHi2N4_-------------------- UM UGE) 33 Ses Se Be oc) is ee ees ee 
mine. 
INORGANIC COMPOUNDS: 
Carbon dioxide_-_-_-_-.- (Of O Die See SPOONS 2a feces pees 44.005 | —78.5____- 50S OF | eee 10050) | fea aes 
Thionyl chloride_____- OVC lara ween eee nr oo eae DTSS980" 7822202 44.5|44.5 |44.5 144.5 
4 Minimum concentration tested. 
HYDROCARBONS 
Against grain weevils, a 100 per cent kill was obtained with amy- 
lene at a concentration of 40.31 per cent, with cyclohexane at a con- 
centration of 13 per cent, and with benzene at a concentration of 3.8 
per cent. Against all of the insects except Tribolium, kerosene, tolu- 
ene, o-xylene, naphthalene, and anthracene were not more than 75 per 
cent effective. 
Trillat and Legendre (26) found that benzene and toluene vapors 
at a concentration of 10 grams per cubic meter were insufficient to 
kill mosquitoes after exposure for an hour at 20° to 28° C. 
Holt (9) tried the effect of benzene, toluene, xylene, naphthalene, 
anthracene, ‘‘benzoline,” heptane, petrol, petroleum ether, and par- 
affin oil (boiling point, 150° to 289° C.), in concentrations of 1 drachm 
