Hydrogels containing botanical repellents encapsulated in zein nanoparticles for crop protection
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Data
2020
Autores
Oliveira, Jhones Luiz de [UNESP]
Campos, Estefânia V. R.
Camara, Marcela Candido
Vechia, Jaqueline Franciosi Della
Matos, Sidneia Terezinha Soares de
Andrade, Daniel Junior de
Gonçalves, Kelly Cristina
Nascimento, Joacir do
Polanczyk, Ricardo Antonio
Araújo, Daniele Ribeiro de
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Editor
ACS
Resumo
Essential oils and their derivatives are eco-friendly biopesticides that can contribute to reducing the use of synthetic pesticides in agricultural pest control, offering advantages including less harm to humans and the environment. This work concerns hydrogel-based repellent systems containing botanical compounds that were emulsified or encapsulated in zein nanoparticles. The hydrogels were prepared according to a two-step process involving molding and crosslinking. They presented good rheological properties, even at elevated temperature (40 oC), a swelling degree of about 30±1.2%, and were able to modulate the release of active compounds. The hydrogels containing botanical compounds presented high repellency (>80%) against two important agricultural pests: whitefly (Bemisia tabaci) and two-spotted spider mite (Tetranychus urticae). These repellent systems are promising for use in sustainable agriculture, since they are based on the use of natural substances for both the matrices and the active agents. It is noteworthy that the systems can be used without direct contact with plants, which minimizes any problems related to phytotoxicity.
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Palavras-chave
Hydrogel, Essential oil, Nanoparticles, Pest control, Sustainable agriculture