Competição larval no caruncho-pequeno-do-feijão Zabrotes subfasciatus (COLEOPTERA: CHRYSOMELIDAE: BRUCHINAE)

• Autor(a) principal: Oliveira, Sharrine Omari Domingues de
• Data de Publicação: 2012
• Tipo de documento: Dissertação
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/3952
• topic: Caruncho do feijão; Competição larval; Bean weevil; Competition larval; CNPQ::CIENCIAS AGRARIAS::AGRONOMIA::FITOSSANIDADE

Strategies of intraspecific competition among individuals can be considered as accommodative, in which there is coexistence and accommodation between competitors, or as confrontation where only one individual secures for itself the necessary resource for their survival and reproduction and the others die. Despite the importance of competition in life history strategies and behavior, there was any study conducted in Zabrotes subfasciatus. Given its importance as a pest of stored beans, this study aimed to evaluate the behavior of larval competition in Z. subfasciatus, as well as the population effects when larval competition in two distinct varieties of beans. In addition to the quantitative results of larval competition, which are commonly used to recognize the prevailing competition strategy, as the survival rate, larval developmental time, the proportion of females, males and females mass, total biomass, longevity and fecundity of females and mass of progeny; larval competition was observed directly by X-ray equipment digital high resolution. Image analysis allowed observing all stages of development from larva to adult, and the formation of the galleries during the larval period, showing the movement and the subsequent placement of individuals on the sides of the grain. This pattern of behavior becomes unquestionable the competition accommodative behavior of Z. subfasciatus.