Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 325105
Title Field trials with plant products to protect stored cowpea against insect damage
Author(s) Boeke, S.J.; Kossou, D.K.; Huis, A. van; Loon, J.J.A. van; Dicke, M.
Source International Journal of Pest Management 50 (2004)1. - ISSN 0967-0874 - p. 1 - 9.
Department(s) Laboratory of Entomology
Publication type Refereed Article in a scientific journal
Publication year 2004
Keyword(s) callosobruchus-maculatus-f - obtectus say coleoptera - essential oils - vigna-unguiculata - pod resistance - bruchidae - extracts - aphididae - toxicity - beetle
Abstract Plant products were evaluated under field conditions for their efficacy as insecticides against the cowpea beetle, Callosobruchus maculatus, on stored cowpea. Seeds, mixed with finely ground clay and three volatile oils were stored in air-tight jerry-cans and canisters. Pods were treated with leaf powders of two plant species and stored in traditional palm-leaf huts. Beetle damage was evaluated before and after storage. The treatments did not prevent damage, but after treatment with oils, fewer beans showed beetle emergence holes; also, the percentage of uninfested beans and the weight of one litre of beans were each higher than for untreated beans. The percentage of germination of stored beans was highest after treatment with Ocimum basilicum oil. Leaf powder of Momordica charantia was effective against weight loss of stored seeds, whereas Ficus exasperata caused a decrease in both the percentage of infested beans and the number of emerged beetles, and more parasitoids emerged than from untreated beans. Laboratory tests on the effect of the oils on the development of the beetle and on bean germination did not reveal effects of the oils. We compare data obtained from the laboratory and with those obtained in the field.
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