Potential use of Sesbania pachycarpa (Fabaceae: Papilionoideae) as a refugia for the legume pod borer Maruca vitrata (Lepidoptera: Crambidae)

Ibrahim Baoua, Niango Malick Ba, Tolulope A. Agunbiade, Venu Margam, Clémentine L. Binso-Dabiré, Sanon Antoine, Barry Robert Pittendrigh

Research output: Contribution to journalArticle

Abstract

Deployment of cowpea with Bacillus thuringiensis (Bt-cowpea), to control Maruca vitrata Fab., must be preceded by the development of an insect resistance management (IRM) plan to ensure a sustainable use of the in-plant protection offered by the transgenic variety. One of the components of a resistance management plan involves the use of wild or cultivated host plants as refugia. In West Africa, wild refugia have the potential to be a major component of such an IRM strategy. In the current study, we examined the occurrence of M. vitrata on three cultivated cowpea varieties and one wild alternative host, Sesbania pachycarpa D.C. Our results indicate that M. vitrata population overlapped on the wild host and cowpea. The overall insect population on S. pachycarpa represents 9-13% of the population on cultivated cowpea. Based on these findings, we suggest that S. pachycarpa may contribute as a refuge for M. vitrata population in case of deployment of Bt-cowpea.

Original languageEnglish (US)
Pages (from-to)212-218
Number of pages7
JournalInternational Journal of Tropical Insect Science
Volume31
Issue number4
DOIs
StatePublished - Dec 1 2011

Keywords

  • Bt-cowpea
  • Maruca vitrata
  • Sesbania pachycarpa
  • resistance management

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Insect Science

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