Searching for common bean genotypes resistant to Acanthoscelides obtectus, a primary pest species of stored beans

Resistant genotypes are a valuable tool in integrated pest management programs of insect pests of stored grains. Here, we screened 90 Brazilian common bean genotypes to select promising sources of resistance to Acanthoscelides obtectus. Thus, bean samples were infested with newly emerged insects, and the number of eggs, emerged insects, developmental time, and larval viability were assessed in a no-choice test. Genotypes IPR Garca, CHIR 13, IAC Harmonia, CHIR 20, IAC Boreal, and CHIP 312 showed low oviposition. - cavalo preto, Perola, IPR Tangara, and CNFRj - 15411 reduced oviposition, the number of emerged adults, and larval viability, suggesting antixenosis and/or antibiosis. Thus, these genotypes are promising sources of resistance factors and can be used in breeding programs to obtain lines of common beans resistant to A. obtectus.