Also found in: Dictionary, Thesaurus, Medical, Legal, Wikipedia.
Related to Fumigant: methyl bromide


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.



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.


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


References in periodicals archive ?
As part of a large research project covering a range of issues related to the challenges facing the strawberry industry, I tracked fumigant use in nine counties through California's pesticide reporting program from 2004 to 2013.
The above-mentioned companies have collectively accounted for the largest portion of the agricultural fumigants market in 2015.
Though effectiveness of volatile oils as fumigant has been well investigated but their activity at different concentration levels and exposure time against local strains of stored grain insect pests in Punjab Pakistan is yet to be evaluated.
The presence of protective MITC levels in metam sodium-treated timbers 7 years after treatment was surprising, because this treatment is considered to provide the shortest protective period of any fumigant treatment (Morrell and Corden 1986).
Their studies confirmed that good agricultural practices are critical factors in determining how much fumigant is released into the atmosphere.
Fumigant toxicity of essential oil from Artemisia sieberi Besser against three stored-product insects.
castaneum adults was attributable to fumigant action.
Keywords: Conyza newii; Plenctranthus marruboides; Compositae; Labiateae; Anopheles gambiae; Fumigant toxicity; Essential oil composition; Perillaldehyde; Perillyl alcohol
The chemical was due to be phased out this year, but the US, European countries and Australia have secured the temporary right to continue using it as a fumigant in 2005-6, because of a lack of commercial alternatives.
Methyl bromide is a toxic fumigant used to control insects, nematodes, weeds, and pathogens.
During our waste disposal efforts," we worked with our fumigation subcommittee to establish our fumigation selection factors and select the fumigant best suited for our needs," Sgroi says.
On the other hand, use of methyl bromide gas as a soft fumigant is being limited because of concerns over depletion of the ozone layer.