Sources of resistance to black aphid in cowpea varieties used as green grains

Vinicius Borges; Daniel Rodrigues Nere; Leandro Carvalho da Silva; Marília Gomes Caminha; Ervino Bleicher; Cândida Hermínia Campos de Magalhães Bertini

doi:10.12741/ebrasilis.v.13.e902

Authors

Vinicius Borges Universidade de São Paulo - Escola Superior de Agricultura Luiz de Queiroz
Daniel Rodrigues Nere Universidade Federal do Ceará https://orcid.org/0000-0003-2653-4142
Leandro Carvalho da Silva Universidade Federal do Ceará (In memorian)
Marília Gomes Caminha Universidade Federal do Ceará
Ervino Bleicher Universidade Federal do Ceará https://orcid.org/0000-0003-3820-7114
Cândida Hermínia Campos de Magalhães Bertini Universidade Federal do Ceará https://orcid.org/0000-0003-2949-5660

DOI:

https://doi.org/10.12741/ebrasilis.v.13.e902

Keywords:

Aphididae, Black Aphid, Cowpea bean, Genetics, Mosaic Virus

Abstract

Evaluation of resistance of Vigna unguiculata L. landraces, used as green beans, to Aphis craccivora Koch was tested. Eleven landraces and standard genotypes were used in a free choice protocol: BR 17-Gurguéia, VITA 7 (susceptible), BRS Guariba and TVu 408P2 (resistant). A completely randomized blocks design was used with six replicates. Seedlings were infested with five six-day-old adult insects. The number of alive adults after 48 h and of alive nymphs after 96 h was evaluated. The results evidenced that there are high genetic diversity among the landraces, the antibiosis as the main mechanism of resistance. By means of multivariate analysis we suggest crosses among the commercial cultivar BRS Guariba and the most dissimilar varieties CCE-088, CCE-075, CCE-013 and CCE-062 to obtain superior hybrids.

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