Characterization of cowpea genotype resistance to Callosobruchus maculatus

• Main Authors: Maria de Jesus Passos de Castro, Edson Luiz Lopes Baldin, Patrícia Leite Cruz, Camila Moreira de Souza, Paulo Henrique Soares da Silva
• Format: Article
• Language: English
• Published: Embrapa Informação Tecnológica 2013-09-01
• Series: Pesquisa Agropecuária Brasileira
• Subjects: Vigna unguiculata; Bruchinae; Chrysomelidae; resistência de plantas; armazenamento
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000900003&lng=en&tlng=en

The objective of this work was to characterize the resistance of 50 cowpea (Vigna unguiculata) genotypes to Callosobruchus maculatus. A completely randomized design with five replicates per treatment (genotype) was used. No-choice tests were performed using the 50 cowpea genotypes to evaluate the preference for oviposition and the development of the weevil. The genotypes IT85 F-2687, MN05-841 B-49, MNC99-508-1, MNC99-510-8, TVu 1593, Canapuzinho-1-2, and Sanzi Sambili show non-preference-type resistance (oviposition and feeding). IT81 D-1045 Ereto and IT81 D-1045 Enramador exhibit antibiosis against C. maculatus and descend from resistant genitors, which grants them potential to be used in future crossings to obtain cowpea varieties with higher levels of resistance.