Neotropical Entomology (2001) 30, 455-460

Rogério Brunherotto and José Djair Vendramim (2001)
Bioatividade de Extratos Aquosos de Melia azedarach L. Sobre o Desenvolvimento de Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) em Tomateiro
[Bioactivity of aqueous extracts of Melia azedarach L. on tomato pinworm Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae)]
Neotropical Entomology 30 (3), 455-460
Abstract: The effect of aqueous extracts of Melia azedarach L. on the development of the tomato pinworm Tuta absoluta (Meyrick) was investigated under laboratory conditions. After hatching, the larvae were fed on tomato leaves (Lycopersicon esculentum, cv. Santa Clara) treated with chinaberry's extracts. The larval and pupal development and mortality and pupal weight were evaluated. Firstly, the trials were carried out with three different concentrations of leaf extracts (0.1, 1.0 and 5.0%), in order to determine the most appropriate one for bioactivity studies. Later, the aqueous extracts of different parts of M. azedarach were compared using the selected concentration (0.1%). The leaf extract was the most effective for tomato pinworm bioactivity studies, followed by raw fruits, branches and ripe fruits.

Determinou-se, em condições de laboratório, o efeito de extratos aquosos de Melia azedarach L. sobre o desenvolvimento da traça-do-tomateiro Tuta absoluta (Meyrick). Para isso, as lagartas foram alimentadas, desde a eclosão, com folhas de tomateiro (Lycopersicon esculentum, cv. Santa Clara), tratadas com extratos dessa meliácea, avaliando-se a duração e viabilidade das fases larval e pupal e o peso de pupas. Inicialmente, foram testadas três concentrações (0,1; 1 e 5%) do extrato de folhas, visando determinar a concentração adequada para estudos de bioatividade dessa planta. Posteriormente, utilizando-se a concentração selecionada (0,1%), foi comparada a bioatividade dos extratos de diferentes estruturas de M. azedarach, constatando-se que as folhas foram a estrutura vegetal com maior bioatividade sobre a traça, vindo a seguir os frutos verdes, ramos e frutos maduros.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
(original language: Portuguese)
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Database assignments for author(s): José Djair Vendramim

Research topic(s) for pests/diseases/weeds:
control - general

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Pest and/or beneficial records:

Beneficial	Pest/Disease/Weed	Crop/Product	Country	Quarant.
	Phthorimaea absoluta