Density effects of the banana weevil, Cosmopolites sordidus (Germar), on its oviposition performance and egg and larval survivorship

Publication Type

Journal Article

Journal Name

Entomologia Experimentalis et Applicata

Publication Date

1-1-1995

Abstract

Plant oils (cottonseed, soybean, corn, groundnut and palm) at different dosages were evaluated in the laboratory for their ability to suppress the populations of Cryptolestes pusillus and Rhyzopertha dominica in maize and sorghum. Exposure of adults of both beetle species to grains treated with 10 ml/kg of the different oils induced 100% mortality within 24 h. A dose of 5 ml/kg of each oil significantly decreased the progeny produced by R. dominica. Complete protection was achieved on grains treated with 10 ml/kg. These oils also repelled the adults of both species. Percentage weight loss caused by R. dominica in grains treated with 5 ml/kg and 10 ml/kg levels were significantly lower than in untreated grains. Oil treatment did not affect the germination of, or water absorption by, maize and sorghum grains compared with untreated grains. The potential use of plant oils in the management of insect pests in traditional grain storage is discussed. 1995 The Netherlands Entomological Society

Keywords

Cryptolestes pusillus, maize, plant oils, Rhyzopertha dominica, sorghum, stored grain pests

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