.

Authors

  • Rafael Tissot Frota Universidade Regional do Noroeste do Estado do Rio Grande do Sul (UNIJUI)
  • Régis Sivori Silva dos Santos Universidade Regional do Noroeste do Estado do Rio Grande do Sul (UNIJUI)

Abstract

Pentatomidae bugs associated with sunfl ower crops in the northwest of Rio Grande do Sul state and the action of Euschistus heros (Fabricius, 1794) (Hemiptera: Pentatomidae) on sunfl ower seeds. The goals of this study were to identify the species of bugs attacking sunflowers in the northwest of Rio Grande do Sul state and to estimate the damage caused during the R6 and R8 stages. The bugs present in ten sunflower crops were collected, and their feeding sites were determined. The species Euschistus heros (Fabricius, 1794) was used to determine the damage by individualizing the capitula using mesh cages in the R6 and R8 stages. Each caged capitulum was infested with one, two, or four bugs. Besides E. heros (47.67%), Dichelops furcatus (Fabricius, 1775) (44.18%), Piezodorus guildinii (Westwood, 1837) (4.65%) and Edessa meditabunda (Fabricius, 1794) (3.48%) were found. There were no significant differences among the treatments regarding the yield components (weight of 1000 sunflower seeds, germination power, oil and protein content). The tetrazolio test indicated that the bugs fed on the sunflower seeds.

Author Biography

Régis Sivori Silva dos Santos, Universidade Regional do Noroeste do Estado do Rio Grande do Sul (UNIJUI)

Possui Graduação em Agronomia, Mestrado e Doutorado em Fitotecnia pela Universidade Federal do Rio Grande do Sul (UFRGS).

Mais informações no Currículo Lattes.

Downloads

Published

2007-01-01

Issue

Vol. 20 No. 4 (2007)

Section

Artigos

License

Copyright (c) 2007 Rafael Tissot Frota, Régis Sivori Silva dos Santos

Creative Commons License

This work is licensed under a Creative Commons Attribution 4.0 International License.

After the electronic publication of the manuscript, the authors are entitled, without any restriction, on its contents.

License Creative Commons Atribuição 4.0 Internacional - CC BY

 Licença Creative Commons

Authors are able to take on additional contracts separately, non-exclusive distribution of the version of the paper published in this journal (ex.: publish in institutional repository or as a book), with an acknowledgment of its initial publication in this journal.