African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6691

Full Length Research Paper

Management of the legume pod borer Maruca vitrata Fabricius (Lepidoptera: Crambidae) with field applications of the entomopathogenic fungus, Beauveria bassiana and a mixed formulation of the baculovirus MaviMNPV with emulsifiable neem oil

Joelle Toffa Mehinto
  • Joelle Toffa Mehinto
  • Laboratory of Applied Entomology, Faculty of Sciences and Technology of Dassa (FAST-Dassa), National, University of Sciences Technologies Engineering and Mathematics of Abomey (UNSTIM), BP 14, Dassa, Benin.
  • Google Scholar
Yeyinou Laura Estelle Loko
  • Yeyinou Laura Estelle Loko
  • Laboratory of Applied Entomology, Faculty of Sciences and Technology of Dassa (FAST-Dassa), National, University of Sciences Technologies Engineering and Mathematics of Abomey (UNSTIM), BP 14, Dassa, Benin.
  • Google Scholar
Ouorou Kobi Douro Kpindou
  • Ouorou Kobi Douro Kpindou
  • International Institute of Tropical Agriculture, 08 BP 0932 Cotonou, Benin.
  • Google Scholar
Elie Ayitondji Dannon
  • Elie Ayitondji Dannon
  • International Institute of Tropical Agriculture, 08 BP 0932 Cotonou, Benin.
  • Google Scholar
Karimou Zanzana
  • Karimou Zanzana
  • International Institute of Tropical Agriculture, 08 BP 0932 Cotonou, Benin.
  • Google Scholar
Parfait Kassa
  • Parfait Kassa
  • International Institute of Tropical Agriculture, 08 BP 0932 Cotonou, Benin.
  • Google Scholar
Appolinaire Adandonon
  • Appolinaire Adandonon
  • School of Crop and Seed Production and Management (EGPVS), University of Agriculture of Ketou (UAK), 08 BP1055 Cotonou, Benin.
  • Google Scholar
Manuele Tamò
  • Manuele Tamò
  • International Institute of Tropical Agriculture, 08 BP 0932 Cotonou, Benin.
  • Google Scholar


  •  Received: 12 August 2019
  •  Accepted: 04 November 2019
  •  Published: 31 January 2020

Abstract

The present study assessed the effectiveness of the entomopathogen fungus Beauveria bassiana in comparison with neem oil combined with the baculovirus MaviMNPV and a synthetic insecticide deltamethrin for the control of Maruca vitrata Fabricius under field conditions. The trial was conducted in six villages at Glazoue and Djakotomey, two districts in Benin. Four treatments consisting of (1) untreated control, (2) neem + MaviMNPV, (3) B. bassiana and (4) deltamethrin were arranged in a complete randomized block design with three replicates. Reproductive organs of cowpea plants were sampled for estimating population of M. vitrata. In spite of the importance between-field variations observed, bio-pesticides significantly reduced the population density of M. vitrata as well as its damage level. Similarly, grain yields were improved in sprayed cowpea compared to the untreated control, regardless of the experimental zone. In Glazoue, yields ranged from 724.06 ± 5.04 kg/ha (deltamethrin) to 933.03 ± 8.7 kg/ha (B. bassiana). In Djakotomey, 649.1±4.7, 611.07±5.1, 583.19±4.04 and 217.11±3.9 kg/ha were recorded for deltamethrin, B. bassiana, neem + baculovirus, and untreated control, respectively. The possibilities of the using bio-pesticides as efficient IPM components in cowpea are discussed.

Key words: Cowpea pests, bio-pesticides, Beauveria bassiana, neem, baculovirus MaviMNPV, deltamethrin.