RESUMO
This research intended to evaluate the development of Zabrotes subfasciatus (Boh.), a stored-grain pest, on bean genotypes (Phaseolus vulgaris L.) commonly cultivated in the State of Parana and containing arcelin, and the possible resistance of these genotypes to the bruchine. Tests were performed under laboratory conditions (27 masculineC, fotophase 12h, 50 +/- 10 % RH) with the genotypes TPS-Bionobre, IAC-Una, IPR-Uirapuru, IAPAR 44, IPR Juriti, IAPAR 81, Pérola, Carioca, Bolinha, and two others containing arcelin, Arc 1 and Arc 2. The genotypes with Arc 1 and 2 alleles caused higher mortality of immature stages; in Arc 1 developmental period was prolonged and the male and female dry weights were the lowest, suggesting an antibiosis mechanism of resistance. Non-preference for oviposition was not observed for these two genotypes. Among varieties without arcelin, IAPAR 44 was the most resistant to the bruchid, being the least preferred for oviposition, and promoting low percentage of viable eggs, long developmental period and reduced male and female adult dry weight. Perola, IPR Juriti and Bolinha with high number of eggs and viable eggs, low mortality of immature stages, were the most susceptible.
Assuntos
Besouros/crescimento & desenvolvimento , Phaseolus/parasitologia , Animais , Brasil , Besouros/anatomia & histologia , Feminino , Genótipo , Glicoproteínas/genética , Masculino , Oviposição , Controle Biológico de Vetores/métodos , Phaseolus/genética , Lectinas de Plantas/genética , Proteínas de Plantas/genéticaRESUMO
O presente trabalho objetivou avaliar o desenvolvimento de Zabrotes subfasciatus (Boh.), praga de grãos armazenados, em genótipos de feijoeiro (Phaseolus vulgaris L.) comumente cultivados no Paraná e com arcelina, e a possível resistência desses materiais ao bruquíneo. Foram realizados testes em laboratório (27°C, 50 ± 10 por cento UR, fotofase 12h) com os genótipos TPS-Bionobre, IAC-Una, IPR-Uirapuru, IAPAR 44, IPR Juriti, IAPAR 81, Pérola, Carioca e Bolinha, além de dois outros contendo arcelina, Arc 1 e Arc 2. Os genótipos com os alelos Arc 1 e 2 sugerem resistência do tipo antibiose, com elevada mortalidade das fases imaturas, e Arc 1, com período de desenvolvimento prolongado e drástica redução de peso de machos e fêmeas. A resistência do tipo não-preferência para oviposição não foi observada para estes dois genótipos. Dentre os genótipos sem arcelina, IAPAR 44 destacou-se como o mais resistente a Z. subfasciatus, pois foi o menos preferido para oviposição, promovendo baixo percentual de ovos viáveis, longo período de desenvolvimento e reduzido peso de machos e fêmeas. As cultivares Pérola, IPR Juriti e Bolinha foram os mais suscetíveis, com alto número de ovos e ovos viáveis, além de baixa porcentagem de mortalidade de fases imaturas.
This research intended to evaluate the development of Zabrotes subfasciatus (Boh.), a stored-grain pest, on bean genotypes (Phaseolus vulgaris L.) commonly cultivated in the State of Parana and containing arcelin, and the possible resistance of these genotypes to the bruchine. Tests were performed under laboratory conditions (27°C, fotophase 12h, 50 ± 10 percent RH) with the genotypes TPS-Bionobre, IAC-Una, IPR-Uirapuru, IAPAR 44, IPR Juriti, IAPAR 81, Pérola, Carioca, Bolinha, and two others containing arcelin, Arc 1 and Arc 2. The genotypes with Arc 1 and 2 alleles caused higher mortality of immature stages; in Arc 1 developmental period was prolonged and the male and female dry weights were the lowest, suggesting an antibiosis mechanism of resistance. Non-preference for oviposition was not observed for these two genotypes. Among varieties without arcelin, IAPAR 44 was the most resistant to the bruchid, being the least preferred for oviposition, and promoting low percentage of viable eggs, long developmental period and reduced male and female adult dry weight. Perola, IPR Juriti and Bolinha with high number of eggs and viable eggs, low mortality of immature stages, were the most susceptible.