Resistance to Zabrotes subfasciatus (Boheman, 1833) (Coleoptera: Chrysomelidae) in common bean (Phaseolus vulgaris L.) and relationship with Fe and Zn content

Abstract

Zabrotes subfasciatus (Boheman, 1833) is one of the main storage pests affecting common bean (Phaseolus vulgaris L.) in tropical areas. The objective of this work was to evaluate resistance to Z. subfasciatus in common bean genotypes and its relationship with Fe and Zn content. For this purpose, resistance was evaluated of 63 genotypes, by means of: “no-choice experiments”, Fe and Zn mineral content was determined by Energy-Dispersive X-ray Fluorescence and correlation analyses were carried out to know the relationship between these variables. Commercial cultivars from Cuba were susceptible to the arthropod. The wild accessions from which the resistance originated and RAZ lines were resistant, associated with the presence of arcelin variants that confer resistance in the order Arc1 > Arc6 > Arc7 > Arc5 > Arc2. The Arc4 conferred intermediate resistance and Arc3 it didn't confer resistance to this insect. No relationship was detected between resistance to Z. subfasciatus and Fe and Zn content. These results constitute the first report of the absence of relationships between Z. subfasciatus resistance and Fe and Zn mineral content.