期刊
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
卷 220, 期 -, 页码 193-203出版社
ELSEVIER
DOI: 10.1016/j.ijbiomac.2022.08.066
关键词
Plant pesticide nanoparticles; Red fire ant; Attack ability; Venom alkaloid; Survival cost; Eco-friendly
资金
- Guangdong Provincial Special Fund for Modern Agriculture Industry Technology Innovation Teams [2022KJ122, 2023KJ122]
- Modern Agricultural Industrial Technology System of Guangdong Province [2022KJ118]
In this study, pH sensitive chitosan based rotenone nanoparticles were prepared and found to increase the insecticidal activity of rotenone against red fire ants. The nanoparticles also reduced the venom alkaloid content of the ants and weakened their survival in the ecological environment.
Botanical pesticides are biological pesticides that are environment friendly. However, their instability and short persistence limit their application. In this study, pH sensitive chitosan based rotenone (Rot) nanoparticles (CS/ CMCS/Rot-NPs) were prepared using chitosan and carboxymethyl chitosan to take advantage of the acidic nature of the red fire ant midgut. Chitosan based nanoparticles showed photoprotective and slow sustained release effects on Rot and significantly increased the insecticidal activity of Rot against red fire ants. The 24-96hLC50 of CS/CMCS/Rot-NPs against red fire ants was 3.28-6.84 fold that of Rot. The CS/CMCS/Rot-NPs significantly reduced the venom alkaloid content of red fire ants and their living environment and weakened their survival by increasing their survival cost in the ecological environment. Nanotechnology combined with botanical pesticides can be used as a novel, safe, effective, and ecofriendly method to control red fire ants.
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