Abstract

FERREIRA AGUERO¹, Marcos Arturo; OLIVEIRA JANEIRO NEVES², Pedro Manuel  and  GIMENEZ CREMONEZ³, Paulo Sergio. Pyriproxyfen and Diflubenzuron effects on the reproduction of Nezara viridula (L.) [Hemiptera: Pentatomidae]. Investig. Agrar. [online]. 2014, vol.16, n.2, pp.99-106. ISSN 2305-0683.

The green stink bug Nezara viridula is an important pest in many crops and regions of the world. In this study the effect of pyriproxyfen on fecundity and fertility of N. viridula and the effect of diflubenzuron in the reproductive system was evaluated. Two bioassays were conducted in laboratory. In the first, low concentration of pyriproxyfen was tested on adult pairs of N. viridula. After copulation, we assessed the number of eggs/female (fecundity) and the number of hatched nymphs (fertility). In the second bioassay, we evaluated the effect of diflubenzuron in the morphology of female and male reproductive system of N. viridula. The results show that pyriproxyfen, at the tested concentration did not reduce significantly the number of eggs/female (23.61%). A decrease of 52.39% in eggs fertility, was observed preventing nymphs hatching probably due to embryo malformation. Diflubenzuron affected female and male development and reproductive organs. Thus, both pyriproxyfen and diflubenzuron have potential to decrease N. viridula progeny and can be included in integrated pest management. However, field studies are needed.

Keywords : Hemiptera,; endocrine disruptor,; fecundity,; fertility,; reproductive organs.

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