. Control of insects attacking stored tobacco and tobacco products. Tobacco Storage Diseases and injuries. 32 CIRCULAR 6 3 5, U. S. DEPARTMENT OF AGRICULTURE â :â .. FlGUBB 22.âRectangular steel chambers used in the fumigation of tobacco in vacuum, each chamber being 37 by 6% by 4% feet and having a volume of 1,162 cubic feet. These tanks were installed for treating imported cigarette tobacco and each has a capacity of about 17,500 pounds of tobacco. DOSAGES AND EXPOSURE OF AVAILABLE FUMIGANTS The most widely used gases for the fumigation of tobacco in vacuum are hydrocyanic acid and a mixture
. Control of insects attacking stored tobacco and tobacco products. Tobacco Storage Diseases and injuries. 32 CIRCULAR 6 3 5, U. S. DEPARTMENT OF AGRICULTURE â :â .. FlGUBB 22.âRectangular steel chambers used in the fumigation of tobacco in vacuum, each chamber being 37 by 6% by 4% feet and having a volume of 1,162 cubic feet. These tanks were installed for treating imported cigarette tobacco and each has a capacity of about 17,500 pounds of tobacco. DOSAGES AND EXPOSURE OF AVAILABLE FUMIGANTS The most widely used gases for the fumigation of tobacco in vacuum are hydrocyanic acid and a mixture of 1 part of ethylene oxide and 9 parts of carbon dioxide. A mixture of 15 percent of methyl formate and 85 percent of carbon dioxide has given good results in the fumiga- tion in vacuum of bales of tobacco of low density. In bales closely packed the results have been unsatisfactory with the methyl formate- carbon dioxide mixture. The dosages and exposures recommended for the fumigation ot tobacco in vacuum when the temperature of the tobacco is 70° F. Dr above are given in table 1. Table 1.âDosages of various gases recommended for the fumigation of different types of tobacco in vacuum chambers at a temperature of 70° F. or above Fumiganl Dosage per 1,000 cubic feet Tobacco (Ciearette Hydrocyanic -Cigar filler [Cigar wrapper I Cigarette ('liar ;..Iâ .Manufactured cigars_ (Cigarette Methyl formate and carbon dioxide {Cigar filler [Manufactured Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Reed, W. D. (William Doyle), 1897-; Vinzant, J. P. (John Paul), 1907-. Washington, D. C. : U. S. Dept. of Agriculture
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