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Feeding preferences of the legume pod borer Maruca vitrata (Lepidoptera: Crambidae) larvae and suitability of different flower parts for larval development

Published online by Cambridge University Press:  01 June 2013

Fousséni Traore*
Affiliation:
Institut de l'Environnement et de Recherches Agricoles, CREAF de Kamboinsé, 01 BP 476, Ouagadougou 01, Burkina Faso
Clémentine L. Dabire-Binso
Affiliation:
Institut de l'Environnement et de Recherches Agricoles, CREAF de Kamboinsé, 01 BP 476, Ouagadougou 01, Burkina Faso
Niango Malick Ba
Affiliation:
Institut de l'Environnement et de Recherches Agricoles, CREAF de Kamboinsé, 01 BP 476, Ouagadougou 01, Burkina Faso
Antoine Sanon
Affiliation:
Laboratoire d'Entomologie Fondamentale et Appliquée, Unité de Formation en Sciences de la Vie et de la Terre, Université de Ouagadougou, 03 BP 7021, Ouagadougou 03, Burkina Faso
Barry Robert Pittendrigh
Affiliation:
Department of Entomology, University of Illinois at Urbana-Champaign, Urbana, IL, USA
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Abstract

With the advent of transgenic Bacillus thuringiensis (Bt)-cowpea, there is a need to identify the feeding preferences of Maruca vitrata Fab. to determine in which component of the plant the expression of the toxin needs to be the highest to ensure the greatest efficacy of insecticidal Bt proteins. In the current study, we examined the feeding preferences of M. vitrata larvae in a naturally infested cowpea field. We also tested, in the laboratory, the suitability of different flower components for the larval development of M. vitrata. Our results indicate that in the field, all types of flowers, regardless of their age, were infested with M. vitrata larvae. The reproductive organs, in the flowers, were the preferred feeding diet for the larvae. Laboratory bioassays confirmed that the reproductive organs were the optimal tissues for M. vitrata larval development. The implications of these findings for transgenic Bt-cowpea are discussed.

Type
Research Papers
Copyright
Copyright © icipe 2013

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