Cypermethrin and Fenvalerate as Grain Protectants Against Tribolium castaneum (Coleoptera: Tenebrionidae) and Cryptolestes ferrugineus (Coleoptera: Cucujidae) at Different Moisture Levels and Temperatures
Authors: Joia, B. S.; Loschiavo, S. R.; Webster, G. R. B.
Source: Journal of Economic Entomology, Volume 78, Number 3, June 1985 , pp. 637-641(5)
Publisher: Entomological Society of America
Abstract:The initial effectiveness and residual activity of cypermethrin and fenvalerate applied at 8 and 12 mg (AI)/kg to wheat of 13.3 and 15.0% moisture content was evaluated against the red flour beetle, Tribolium castaneum (Herbst), and the rusty grain beetle, Cryptolestes ferrugineus (Stephens), and compared with that of malathion at 8 mg/kg. Treated wheat was stored at 25 and −5°C and sampled at six intervals during a 60-week storage period. Bioassays using adult mortality and production of F1 progeny as criteria revealed cypermethrin to be effective against both species under all storage conditions and at all intervals. Fenvalerate caused only 33% mortality of C. ferrugineus. At the two moisture contents, fenvalerate caused 63.3 to 66.7% initial mortality of T. castaneum at 8 mg/kg and 90 to 100%at 12 mg/kg. Production of progeny was prevented under all conditions. At a storage temperature of 25DC, the effectiveness of malathion declined after 12 weeks on wheat of 15% moisture content, and after 24 weeks on wheat of 13.3% moisture content. However, on malathion-treated wheat stored at −5°C, mortality of both species was 100% during the entire storage period of 60 weeks.
Document Type: Research Article
Publication date: June 1, 1985
- 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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