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单词 fumigant
释义

fumigant


fu·mi·gant

F0360800 (fyo͞o′mĭ-gənt)n. A chemical compound used in its gaseous state as a pesticide or disinfectant.
[Latin fūmigāns, fūmigant-, present participle of fūmigāre, to smoke; see fumigate.]

fumigant

(ˈfjuːmɪɡənt) n (Chemistry) a substance used for fumigating

fu•mi•gant

(ˈfyu mɪ gənt)

n. any volatile or volatilizable chemical compound used as a disinfectant or pesticide. [1720–30; < Latin]
Thesaurus
Noun1.fumigant - a chemical substance used in fumigationchemical, chemical substance - material produced by or used in a reaction involving changes in atoms or molecules
Translations

Fumigant


fumigant

[′fyü·mə·gənt] (chemistry) A chemical compound which acts in the gaseous state to destroy insects and their larvae and other pests; examples are dichlorethyl ether, p-dichlorobenzene, and ethylene oxide.

Fumigant

 

a toxic substance used in the gaseous or vapor state to destroy harmful insects and causative agents of plant diseases. Fumigants constitute a class of pesticides.

One of the most commonly used fumigants is methyl bromide, which is used to kill soil-borne insects and agricultural pests (rate of application, 26–60 g/m3; permissible vapor concentration in a work area, 1 mg/cm3). Other common fumigants include 1,2-dichloroethane, which is employed for soil fumigation against insects of the Phylloxeridae family (800–1,200 kg per hectare [ha]); Nemagon, which is used for fumigation against soil insects (200–300 kg/ha); and D-D Mixture, which is a preparation consisting of dichloropropanes (500–1,000 liters/ha) and is also used for soil fumigation. Hydrocyanic acid, another widely used fumi-gant, is prepared in gaseous form at the fumigation site from such salts as sodium cyanide and tsianplav (a mixture of calcium cyanide and sodium cyanide); it is used to control populations of susliks (120–150 g/ha) and to fumigate tea bushes, citrus trees (under tents), planting stock, and mills, including groats mills (100–125 g/m3). Flies and other flying insects in closed areas are destroyed with aerosol insecticides.

Gas masks and other protective devices are used when working with fumigants. Since many fumigants are explosive and flammable, some of them—such as dichloroethane and carbon disulfide—are mixed with fire-extinguishing chemicals; for example, carbon tetrachloride is added to dichloroethane. Moreover, possible sources of combustion and explosion are removed; electric welding, the striking of matches, and the lighting of fires are forbidden in the area being fumigated. Rubber hoses are used for decanting flammable liquids.

REFERENCES

Mel’nikov, N. N. Khimiia i tekhnologiia pestitsidov. Moscow, 1974.
Spravochnik po pestitsidam. Edited by L. I. Medved’. Kiev, 1974.

E. I. ANDREEVA

fumigant


Related to fumigant: methyl bromide
  • noun

Words related to fumigant

noun a chemical substance used in fumigation

Related Words

  • chemical
  • chemical substance
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