Abstract

Bean weevil biology in different hosts

Highlights

  • The bean weevil Zabrotes subfasciatus Boh. (Coleoptera: Bruchinae) is the pest that causes more damage to common beans (Phaseolus vulgaris) during storage (Brito et al, 2015)

  • Zabrotes subfasciatus oviposition parameters were not affected by the hosts, larval viability and adult emergence were significantly lower when Z. subfasciatus was developed in V. unguiculata (Table 1)

  • High larval viability values in P. lunatus and P. vulgaris indicated absence of antinutritional factors, which allow for a higher percentage of viable larvae

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Summary

Introduction

The bean weevil Zabrotes subfasciatus Boh. (Coleoptera: Bruchinae) is the pest that causes more damage to common beans (Phaseolus vulgaris) during storage (Brito et al, 2015). (Coleoptera: Bruchinae) is the pest that causes more damage to common beans (Phaseolus vulgaris) during storage (Brito et al, 2015). In Brazil, its action damages 10% of all beans produced (Lorini, 2008). Larvae of this bruchid construct galleries in the beans to feed themselves, reducing grain weight and germination, besides favoring the entry of microorganisms such as fungi and mites, depreciating the product’s final value (Quintela, 2002). Zabrotes subfasciatus feeds on other Fabaceae species, such as lima bean (Phaseolus lunatus), peas (Pisum sativum), and cowpea (Vigna unguiculata) (Silva et al, 2001; Girão Filho et al, 2012). Host abundance and sites that are free from competition and predators are influential factors (Siemens et al, 1991)

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