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Adults of the rice weevil, SiIophilus oryzae (L.), placed 0, 40, 80,120, and 140 cm from the bottom of an open steel bin, were fumigated with hydrogen phosphide at dosages of 1.16, 1.74, 2.33, and 4.66 mg per liter. Aluminurn phosphide pellets were applied at the bottom of the bin with moist cotton for 8, 12, 16, and 24 hr. All dosages killed all the insects at all levels when they were exposed for 24 hr. When adults and eggs of the Angoumois grain moth, Sitotroga cerealella (Olivier), placed at 0-, 40-, 80-, and 120-cm levels in a column of paddy, were fumigated in air-tight steel bins, all adults were killed in 8 hr and all eggs in 24 hr. Eggs of this insect required a higher dose or longer exposure period than adults to obtain 100% mortality.
Document Type: Research Article
Publication date: June 1, 1969
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.