Home >> Journal of Economic Entomology, Volume 72, Number 2

Residual Effectiveness of Emulsion and Encapsulated Formulations of Malathion and Fenitrothion against Four Stored Grain Beetles

Authors: LaHue, Delmon W.; Kadoum, Ahmed

Source: Journal of Economic Entomology, Volume 72, Number 2, April 1979 , pp. 234-237(4)

Publisher: Entomological Society of America

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Abstract:

Emulsifiable concentrate and encapsulated formulations of malathion and fenitrothion were applied to plywood surfaces at 135, 269, 538, 807, and 1076 mg Al/m2 to determine their toxicity and persistence against the rice weevil, Sitophilus oryzae (L.), confused flour beetle Tribolium confusum Jacquelin duVal, red flour beetle T. castaneum (Herbst), and lesser grain borer Rhyzopertha dominica (F.). The insects were exposed to the treated surfaces for 6, 12, 24, 48, and 72 h at 1, 3, 6, 9, and 12 mo posttreatment, and 96 h readings were made 12 mo posttreatment.

In general, fenitrothion was more effective than malathion in comparative tests. Also, the encapsulations were more persistent than the emulsion. T. confusum 'was the most tolerant to the killing action of the residues. Persistence of residues and insecticidal activity were in direct relation to dosage application.

Document Type: Research article

Publication date: 1979-04-01

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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