Manejo do ácaro-rajado, Tetranychus urticae koch (Acari: Tetranychidae), com bioinsumos vegetais e emulsificados
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Data
2025-07-25
Autores
Piffer, Ana Beatriz Mamedes
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Universidade Federal do Espírito Santo
Resumo
The two-spotted spider mite, Tetranychus urticae Koch, 1836 (Acari: Tetranychidae), is one of the major agricultural pests worldwide. In this context, this study aimed to investigate the acaricidal activity of the vegetable oils from Allium sativum (garlic), Annona muricata (soursop), Azadirachta indica (neem), and the isolated compound D-limonene (1) individually and in combinations under laboratory conditions, as well as (2) an emulsion of the combined vegetable oils both in laboratory assays and greenhouse conditions for the suppression of T. urticae. Based on the laboratory tests with the oils, (1) each oil individually showed significant efficacy in reducing egg viability and inducing adult mortality. Combinations of the oils further enhanced the acaricidal effect, with significant outcomes across both exposure routes. Subsequently, (2) the emulsion exhibited a dose-dependent effect, significantly reducing egg viability and increasing adult mortality in laboratory trials. Under greenhouse conditions, a substantial reduction in mite populations was observed. Altogether, it can be concluded that vegetable oils, particularly when used in combination and as emulsions, are effective for the management of T. urticae. These findings contribute to the recent trend of developing emulsions as bioproducts.
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Acaricidas botânicos , Emulsões , Manejo
fitossanitário de pragas , Manejo fitossanitário de pragas , Óleos vegetais , Botanical acaricides , Emulsions , Pest management , Vegetable oils