Gardona as a Protectant Against Insects in Stored Wheat

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Abstract:

Gardona® (2-chloro-1-(2, 4, 5-trichlorophenyl)vinyl dimethyl phosphate) was tested on hard winter wheat as a protectant against adult rice weevils, Sitophilus oryzae (L.); red flour beetles, Tribolium castaneum (Herbst); confused flour beetles, T. confusum Jacquelin duVal; and lesser grain borers, Rhylzopertha dominica (F.). Gardona was applied as an emulsion at dosages of 5, 10, and 20 ppm to wheat containing 10, 12, and 13.5% moisture. Evaluations of results were made at intervals by observing the mortalities after aging of the treated wheat, by counting the number of progeny developing after the toxicity test exposures, and by assessing the damage by progeny to the treated grain. Malathion applied at a rate intended to give a deposit of 10 ppm was used as the basis for comparison.

Gardona at 10 ppm generally was not so effective as malathion, but considerable protection was afforded wheat treated with this insecticide. High moisture content of the wheat lowered the efficacy of Gardona, but the adverse effect of high moisture was compensated for to some extent when the dosage was increased.

Document Type: Research Article

Publication date: April 16, 1973

More about this publication?
  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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