Oct. 15, 1925 
CJiloropicrin as a Fumigant for Cereal Products 
759 
Under practical conditions, it is necessary to increase the volatility 
by atomizing the chloropicrin in order that a lethal concentration 
may be built up in the atmosphere before the loss due to leakage so 
reduces the amount of chloropicrin present that a lethal concentration 
can never be attained. 
When the spray of chloropicrin is directed toward the infested 
areas, the insects are exposed to a saturated atmosphere while the 
entire volume of the room very quickly attains a lethal concentration. 
When chloropicrin is present in the flour, deleterious effects are 
noted in the bread produced, from such flour. 
These effects are due to the ability of the chloropicrin to retard 
fermentation and to affect in a harmful manner the physical con¬ 
dition of the gluten-forming proteins. 
When flours or wheats treated with chloropicrin are exposed to the 
atmosphere for sufficient time, the chloropicrin disappears from them. 
Fumigated flours given proper exposure to the atmosphere show 
complete recovery from the chloropicrin treatment. 
LITERATURE CITED 
(1) Association of Official Agricultural Chemists. 
1920. OFFICIAL AND TENTATIVE METHODS OF ANALYSIS. AS COMPILED 
BY THE COMMITTEE ON REVISION OF METHODS. REVISED TO 
November l, 1919 . 417 p., illus. Washington, D. C. 
(2) Bailey, C. H. 
1916. A METHOD FOR THE DETERMINATION OF THE STRENGTH AND BAKING 
qualities of wheat flour. Jour. Indus, and Engin. Chem. 8: 
53-57, illus. 
(3) Bertrand, G. 
1919. SUR LA HAUTE TOXICITE DE LA CHLOROPICRINE VIS-i-VIS DE CER¬ 
TAINS ANIMAUX INFERIEURS ET SUR LA POSSIBILITE D’EMPLOI DE 
cette substance comme parasiticide. Compt. Rend. Acad. 
Sci. [Paris] 168: 742-744. 
( 4 ) -and Rosenblatt, M. 
1919. ACTION TOXIQUE COMPAREe DE QUELQUES SUBSTANCES VOLATILES 
sur divers insectes. Compt. Rend. Acad. Sci. [Paris] 168: 
911-913. 
(5) -Brocq-Rousseu, and Dassonville. 
1919. DESTRUCTION DU CHARANgON PAR LA CHLOROPICRINE. Compt. 
Rend. Acad. Sci. [Paris] 169: 880-882. 
(6) -Brocq-Rousseu, and Dassonville. 
1919. INFLUENCE DE LA TEMPERATURE ET d’AUTRES AGENTS PHYSIQUES 
SUR LE POUVOIR INSECTICIDE DE LA CHLOROPICRINE. Compt. 
Rend. Acad. Sci. [Paris] 169: 1059-1061. 
(7) —-Brocq-Rousseu, and Dassonville. 
1919. ACTION COMPAREe DE LA CHLOROPICRINE SUR LE CHARANgON ET 
sur le tribolium. Compt. Rend. Acad. Sci. [Paris] 169: 1428- 
1430. 
1920. DES CONDITIONS QUI PEUVENT MODIFIER l'aCTIVItE DE LA CHLORO¬ 
PICRINE vis-a-vis des plantes supErieures. Compt. Rend. 
Acad. Sci. [Paris] 170: 952-954. 
(9)-and Rosenblatt, M. 
1920. LA CHLOROPICRINE AGIT-ELLE SUR LES FERMENTS SOLUBLES? 
Compt. Rend. Acad. Sci. [Paris] 171: 137-139. 
(10) Burkhardt, F. 
1920. ERFAHRUNGEN MIT DEM CHLORPIKRIN ALS MITTEL ZUR BEKAMP- 
fung tierischer schadlinge. Deut. Landw. Presse 47: 447. 
(11) Chopin, M. 
1921. RELATIONS ENTRE LES PROPRiEtEr mEcANIQUES DES PATES DE 
farine et la panification. Bui. Soc. Encouragement Indus. 
Nat. 133: 261-273, illus. 
