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.
How to translate text using browser tools
1 March 2016
Effects of Plant Extracts on Developmental Stages of the Predator Podisus nigrispinus (Hemiptera: Pentatomidae)
Júlio César Melo Poderoso,
Maria Emilene Correia-Oliveira,
Thiago Xavier Chagas,
José Cola Zanuncio,
Genésio Tâmara Ribeiro
Florida Entomologist
Vol. 99 • No. 1
March 2016
Vol. 99 • No. 1
March 2016
alternative control
controle alternativo
inseticidas naturais
natural insecticide
percevejo predador
predatory bug