Availability of Metribuzin-Loaded Polymeric Nanoparticles in Different Soil Systems: An Important Study on the Development of Safe Nanoherbicides

Autor(es)

Takeshita, Vanessa ; Munhoz-Garcia, Gustavo Vinicios ; Pinacio, Camila Werk ; Cardoso, Brian Cintra ; Nalin, Daniel ; Tornisielo, Valdemar Luiz ; Fraceto, Leonardo Fernandes

• Tipo de documento: Artigo Científico
• Fonte: PLANTS-BASEL; v. 11, n. 23, p. 17-pg., 2022-12-01.

Resumo

Nanoformulations have been used to improve the delivery of fertilizers, pesticides, and growth regulators, with a focus on more sustainable agriculture. Nanoherbicide research has focused on efficiency gains through targeted delivery and environmental risk reduction. However, research on the behavior and safety of the application of these formulations in cropping systems is still limited. Organic matter contained in cropping systems can change the dynamics of herbicide-soil interactions in the presence of nanoformulations. The aim of this study was to use classical protocols from regulatory studies to understand the retention and mobility dynamics of a metribuzin nanoformulation, compared to a conventional formulation. We used different soil systems and soil with added fresh organic material. The batch method was used for sorption-desorption studies and soil thin layer chromatography for mobility studies, both by radiometric techniques. Sorption parameters for both formulations showed that retention is a reversible process in all soil systems (H similar to 1.0). In deep soil with added fresh organic material, nanoformulation was more sorbed (14.61 +/- 1.41%) than commercial formulation (9.72 +/- 1.81%) (p < 0.05). However, even with the presence of straw as a physical barrier, metribuzin in nano and conventional formulations was mobile in the soil, indicating that the straw can act as a barrier to reduce herbicide mobility but is not impeditive to herbicide availability in the soil. Our results suggest that environmental safety depends on organic material maintenance in the soil system. The availability can be essential for weed control, associated with nanoformulation efficiency, in relation to the conventional formulation. (AU)

• Processo FAPESP: 22/00718-8 - Nanosistemas carreadores de glifosato: do desenvolvimento à aplicação no manejo de plantas daninhas
• Beneficiário: Gustavo Vinícios Munhoz Garcia
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 19/04758-1 - Nanopartículas como sistema carreador de herbicidas aplicados em pré-emergência em solos oriundos de sistema de plantio direto e convencional
• Beneficiário: Vanessa Takeshita
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 17/21004-5 - Agricultura, micro/nanotecnologia e ambiente: da avaliação dos mecanismos de ação a estudos de transporte e toxicidade
• Beneficiário: Leonardo Fernandes Fraceto
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 21/03455-5 - Interação palhada-herbicida em sistema de plantio direto: efeitos de herbicidas pré-emergentes no controle de caruru
• Beneficiário: Camila de Werk Pinácio
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• Processo FAPESP: 22/01554-9 - Impactos da aplicação de uma nanoformulação de metribuzin sobre organismos não-alvo de solo
• Beneficiário: Brian Cintra Cardoso
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica