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The toxic action of phosphine in combination with some alkyl halide fumigants and carbon dioxide against the eggs of Tribolium castaneum Herbst (Coleoptera: Tenebrionidae).

Rajendran, S. and Muthu, M. (1989) The toxic action of phosphine in combination with some alkyl halide fumigants and carbon dioxide against the eggs of Tribolium castaneum Herbst (Coleoptera: Tenebrionidae). Journal of Stored Products Research, 25 (4). pp. 225-230.

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Abstract

The toxicity of phosphine, 3 alkyl halide fumigants (ethylene dibromide, methyl bromide and methyl iodide), carbon dioxide, mixtures of phosphine plus the alkyl halide fumigants or carbon dioxide, to 1-, 2- and 3-day-old eggs of Tribolium castaneum was studied in the laboratory at 30C and 60-70% RH. Combinations of phosphine and alkyl halide fumigants showed antagonism as evidenced by their joint action ratios at the LD90 (<1). The mortality data indicated that mixtures of phosphine and carbon dioxide were more effective than either fumigant alone. At LD50, the order of toxicity of the individual fumigants for a 24-h exposure and on a weight basis (mg fumigant/litre of air) was: phosphine > methyl iodide > ethylene dibromide > methyl bromide. A decline in susceptibility of eggs with age for methyl bromide and ethylene dibromide and a peak tolerance at 2 days for carbon dioxide were noted.

Item Type: Article
Uncontrolled Keywords: Insecticides-; Insect-pests; Stored-products-pests; fumigants-; toxicity-; Carbon-dioxide; mixtures-; Phosphine-; Ethylene-dibromide; Methyl-bromide; pesticides-; agricultural-entomology
Subjects: 600 Technology > 03 Agriculture > 05 Insect/Pest Control
Divisions: Food Protectants and Infestation Control
Depositing User: Food Sci. & Technol. Information Services
Date Deposited: 15 Jun 2011 05:58
Last Modified: 28 Dec 2011 10:03
URI: http://ir.cftri.com/id/eprint/8201

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