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Aqueous botanical extracts, via different extraction methods, for control of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae)

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Abstract

Diamondback moth, Plutella xylostella (Linnaeus) (Lepidoptera: Plutellidae), is a vegetable pest of the genus Brassica worldwide. The development of new, safer bio-insecticides with less negative impacts on human health, flora, fauna, and specific to the target is needed to combat this pest, particularly in small-scale organic agriculture. In this sense, the efficiency of 7 plant species in the form of aqueous botanical extracts was evaluated regarding the bio-insecticide effect, using three extraction methods (orbital agitation, decoction, and infusion). There was a difference between the treatments, highlighting the decoction of Couroupita guianensis, which presented the highest efficiency (39%) for second-instar larvae of P. xylostella, followed by infusions of Codiaeum variegatum and Ruta graveolens, both with a 29% efficiency rate. The 3 extraction methods were statistically different, with decoction and orbital agitation presenting the best results.

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Acknowledgements

This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior—Brasil (CAPES) and the Conselho Nacional de Desenvolvimento Científico e Tecnológico – Brasil (CNPq).

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Correspondence to Vinícius Ferraz Nascimento.

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The authors declare no conflict of interest.

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Escobar-Garcia, H.A., Nascimento, V.F., De Melo, M.A. et al. Aqueous botanical extracts, via different extraction methods, for control of the diamondback moth, Plutella xylostella (Lepidoptera: Plutellidae). J Plant Dis Prot 131, 255–263 (2024). https://doi.org/10.1007/s41348-023-00809-6

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  • DOI: https://doi.org/10.1007/s41348-023-00809-6

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