Association of zein nanoparticles with botanical compounds for effective pest control systems

Author(s):Show less -

de Oliveira, Jhones L. ^[1] ; Campos, Estefania V. R. ^[1] ; Germano-Costa, Tais ^[2] ; Lima, Renata ^[2] ; Della Vechia, Jaqueline Franciosi ^[3] ; Soares, Sidneia Terezinha ^[3] ; de Andrade, Daniel Junior ^[3] ; Goncalves, Kelly Cristina ^[3] ; do Nascimento, Joacir ^[3] ; Polanczyk, Ricardo Antonio ^[3] ; Fraceto, Leonardo Fernandes ^[1]

Affiliation

^[1] Sao Paulo State Univ UNESP, Inst Sci & Technol, Ave Tres Marco 511, BR-18087180 Sao Paulo - Brazil

^[2] Univ Sorocaba, LABiToN Lab Evaluat Bioact & Toxicol Nanomat, Sao Paulo - Brazil

^[3] Sao Paulo State Univ UNESP, Dept Plant Protect, Fac Agron & Vet Sci, Sao Paulo - Brazil

• Document type: Journal article
• Source: Pest Management Science; v. 75, n. 7, p. 1855-1865, JUL 2019.
• Web of Science Citations: 5

Abstract

BACKGROUND Botanical compounds from plant species are known to have pesticidal activity and have been used in integrated pest management programs. The varied spectrum of the pesticidal action of these compounds can also avoid selection of resistance in pest populations. In this study, mixtures of the botanical compounds geraniol, eugenol and cinnamaldehyde were encapsulated in zein nanoparticles to improve their stability and efficiency. Biological effects of the nano-scale formulations of the botanical compounds were evaluated against two agricultural pests: the two-spotted spider mite (Tetranychus urticae) and the soybean looper (Chrysodeixis includes). RESULTS The formulations were stable over time (120 days) with a high encapsulation efficiency (>90%). Nanoencapsulation also provided protection against degradation of the compounds during storage and led to a decrease in toxicity to non-target organisms. The release of the compounds (especially eugenol and cinnamaldehyde) from the nanoparticles was directly influenced by temperature, and the main mechanism of release was through a diffusion-based process. Nanoencapsulated compounds also showed superior efficiency compared to the emulsified compounds in terms of repellency and insecticidal activity. CONCLUSION The findings of this study indicate that the convergence of botanical compounds with nano-scale formulation has the potential to improve efficacy for their sustainable use in integrated pest management in agriculture. (c) 2019 Society of Chemical Industry (AU)

• FAPESP's process: 17/21004-5 - Agriculture, micro/nanotechnology and environment: from evaluation of the mechanisms of action to studies of transport and toxicity
• Grantee: Leonardo Fernandes Fraceto
• Support type: Research Projects - Thematic Grants
• FAPESP's process: 14/20286-9 - Development of modified release systems based on zein and chitosan for botanical repellents aiming the control of whitefly (Bemisia tabaci) in different cultures
• Grantee: Jhones Luiz de Oliveira
• Support type: Scholarships in Brazil - Doctorate