Effects of plant extracts on developmental stages of the predator Podisus nigrispinus (Hemiptera: Pentatomidae)

Authors

  • Júlio César Melo Poderoso Departamento de Engenharia Florestal, Curso de Engenharia Florestal, Universidade Federal de Sergipe, Av. Marechal Rondon s/n, 49.100-000- São Cristóvão, Sergipe, Brazil
  • Maria Emilene Emilene Correia-Oliveira School of Environment & Life Sciences, The University of Salford, M54WT, Salford, United Kingdom
  • Thiago Xavier Chagas Departamento de Engenharia Florestal, Curso de Engenharia Florestal, Universidade Federal de Sergipe, Av. Marechal Rondon s/n, 49.100-000- São Cristóvão, Sergipe, Brazil
  • José Cola Zanuncio Departamento de Entomologia, Universidade Federal de Viçosa, 36.571-000- Viçosa, Minas Gerais, Brazil
  • Genésio Tâmara Ribeiro Departamento de Engenharia Florestal, Curso de Engenharia Florestal, Universidade Federal de Sergipe, Av. Marechal Rondon s/n, 49.100-000- São Cristóvão, Sergipe, Brazil

Keywords:

alternative control, natural insecticide, predatory bug

Abstract

The aim of this study was to evaluate the toxicity of aqueous extracts of Annona squamosa L. (Magnoliales: Annonaceae), Azadirachta indica A. Juss (Sapindales: Meliaceae), Corymbia citriodora Hook. (Myrtales: Myrtaceae), Cymbopogon winterianus Jowitt ex Bor (Poales: Poaceae), Lippia sidoides Cham. (Lamiales: Verbenaceae), Mentha arvensis L. (Lamiales: Lamiaceae), Ricinus communis L. (Malpighiales: Euphorbiaceae), and Sapindus saponaria L. (Sapindales: Sapindaceae) on the developmental stages (eggs, 5th instars, and adults) of a generalist predator Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae). The eggs were dipped in extract concentrations of 0, 1, 3, 5, 7, and 10%, and the nymphs and adults received 1 μL of each extract on the dorsal thorax. The extracts affected hatching, with the extracts of A. indica (flowers), A. squamosa, and R. communis being the most toxic. None of the extracts affected the mortality in the nymphal stage, whereas S. saponaria, A. indica (flowers), and L. sidoides extracts caused relatively high mortality rates in adults. Due to the insecticidal effect of these extracts, they need to be used with care because they affect the life cycle of the predator P. nigrispinus.

 

Sumário

 

O objetivo desse estudo foi avaliar a toxicidade dos extratos aquosos da Annona squamosa L. (Magnoliales: Annonaceae), Azadirachta indica A. Juss (Sapindales: Meliaceae), Corymbia citriodora Hook. (Myrtales: Myrtaceae), Cymbopogon winterianus Jowitt ex Bor (Poales: Poaceae), Lippia sidoides Cham. (Lamiales: Verbenaceae), Mentha arvensis L. (Lamiales: Lamiaceae), Ricinus communis L. (Malpighiales: Euphorbiaceae), e Sapindus saponaria L. (Sapindales: Sapindaceae) nos estágios de desenvolvimento (ovos, quinto instar e adultos) do predador generalista Podisus nigrispinus (Dallas) (Hemiptera: Pentatomidae). Os ovos foram imergidos em extratos com concentrações de 0, 1, 3, 5, 7 e 10%, ninfas e adultos do predador receberam 1 μl de cada extrato na área dorsal. Os extratos de A. indica (flores), A. squamosa e R. communis afetaram a eclosão de ninfas. Nenhum dos extratos avaliados afetou a mortalidade nas ninfas, porém os extratos de S. saponaria, A. indica (flores) e L. sidoides causaram alta mortalidade aos adultos. Apesar desses extratos possuirem ação inseticidas, eles devem ser utilizados com cuidado, pois podem afetar o ciclo de vida do predador P. nigrispinus.

 

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Published

2015-12-30

Issue

Vol. 99, No. 1 (March 2016)

Section

Scientific Notes

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