PHYSICAL AND BROMATOLOGICAL CHARACTERISTICS OF COWPEA VARIETIES PREFERRED BY Callosobruchus maculatus (COLEOPTERA: BRUCHIDAE)

Authors

  • Glauce Portela de Oliveira Graduate Program in Tropical Agriculture. Universidade Federal de Mato Grosso, Cuiabá, MT
  • Dryelle Sifuentes Pallaoro Graduate Program in Tropical Agriculture. Universidade Federal de Mato Grosso, Cuiabá, MT
  • Elisangela Clarete Camili Department of Plant Sciences and Plant Protection, Universidade Federal de Mato Grosso, Cuiabá, MT
  • Ândrea Carla Dalmolin Department of Biological Sciences, Universidade Estadual de Santa Cruz, Ilhéus, BA

DOI:

https://doi.org/10.1590/1983-21252018v31n229rc

Keywords:

Vigna unguiculata. Seed coat. Anatomy.

Abstract

Cowpea is an herbaceous legume susceptible to several insects and diseases; and the beetle Callosobruchus maculatus is the main pest causing direct losses in the production of this crop. The objective of this work was to assess the physical and bromatological characteristics of beans of cowpea varieties (Bico-de-Ouro, BRS-Novaera, BRS-Guariba and BRS-Tumucumaque) preferred by C. maculatus. Adults of C. maculatus were obtained from a storage unit of cowpea beans. The physical and bromatological characteristics and attractiveness of cowpea beans to insects were evaluated in laboratory. The preferences for oviposition with no choice and attraction to cowpea beans by C. maculatus are not related to the high protein content or physical characteristics of the bean seed coat (thickness and fiber content), since the insects were more attracted to beans of the variety Bico-de-Ouro, which had low crude protein content, the thickest seed coat and high NDF content.

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Published

06-04-2018

Issue

Section

Technical Note