Avaliação do impacto da deltametrina no predador Brontocoris tabidus (Heteroptera: Pentatomidae) criado em soja e eucalipto no laboratório e no campo

• Autor(a) principal: Vargas, Paulo Sérgio da Rocha
• Data de Publicação: 2011
• Tipo de documento: Tese
• Idioma: por
• Título da fonte: LOCUS Repositório Institucional da UFV
• Texto Completo: http://locus.ufv.br/handle/123456789/906
• topic: Inseticida; Brontocoris tabidus; Predador; Insecticides; Brontocoris tabidus; Predator; CNPQ::CIENCIAS BIOLOGICAS::ZOOLOGIA::ZOOLOGIA APLICADA

The study of the impact of insecticides on the reproduction of natural or introduced predators it has grown, including those displayed during the nimphal phase. It was studied the impact of the exposition to the deltamethrin during the nimphal phase on the reproduction of males and females of the predator Brontocoris tabidus (Heteroptera: Pentatomidae) in plant of Eucalyptus urophylla or soy Glycine max (l) Merrill, in the field and laboratory, adults of different intervals of emergency, and its consequence in the two generations, through morphology, morphometry, histology, parameters of the life table and fertility and duration of stadiums. This insecticide did not have impact in the morphology, morphometry and histology of both the sexes of B. tabidus in both the plants, environments and ages of this predator. The reproductive parameters had shown impact of the deltamethrin only in generation FØ, but without consequence in the following generations. The fecundity did not vary in the field and was lesser in the laboratory, as well as the numbers of eggs/female and nymphs in generation FØ. The longevity of B. tabidus was similar in the field and laboratory, indicating that the time of predatory activity in programs of biological control in the field can be gotten of deriving individuals of massal creation in the laboratory. The deltamethrin affected the egg numbers/female, eggs/female/ day and eggs/position of generation FØ soy in the laboratory, probably due to massal creation in eucalypt and to the conditions of test in the laboratory. The similarities morphologic and anatomical of this predator in the searched plants, environments and generations had shown that these parameters had not been affected by the deltamethrin. The biggest duration of the N3 stadium of generation FØ had the exposition to pyretroid, but mostraram a recuperação do predador. Os estádios ninfais de B. tabidus não expostos a deltametrina foram mais curtos. A aplicação do inseticida nas culturas de eucalipto e soja pode ser compatível com o predador B. tabidus.