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Resistance of genotypes of cowpea to the attack of Callosobruchus Maculatus (Fabr.,1775) (Coleoptera: Chrysomelidae: Bruchinae)

The objective of this study was to evaluate the resistance of 4 genotypes of cowpea (Vigna unguiculata) to the bean weevil Callosobruchus maculatus (Fabr., 1775). The genotypes evaluated were BR 17-Gurguéia, BRS Rouxinol, TE96-290-12G and BRS Guariba. Tests were conducted with and without possibility of choice, in a completely randomized design, totaling 4 treatments each with 5 replicates, evaluating the number of eggs, number of emerged insects, egg viability (%) and instantaneous rate of population growth. In the test with possibility of choice the genotype TE96-290-12G was revealed as the most resistant. BRS Rouxinol was the most susceptible genotype.

Vigna unguiculata; bean weevil; stored grains; alternative control


Instituto Biológico Av. Conselheiro Rodrigues Alves, 1252 - Vila Mariana - São Paulo - SP, 04014-002 - São Paulo - SP - Brazil
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