Development of an ecofriendly biomimetic nano-silica acaricide featuring fusion protein-based self-encapsulation and biocontrol functions against Tetranychus urticae
文献类型： 外文期刊
作者： Li, Fei 1 ; Zhu, Lei 1 ; Chen, Ling 1 ; Min, Yong 1 ; Qiu, Yimin 1 ; Liu, Xiaoyan 1 ;
作者机构： 1.Natl Biopesticide Engn Technol Res Ctr, Wuhan 430064, Peoples R China
2.Hubei Acad Agr Sci, Hubei Biopesticide Engn Res Ctr, Wuhan 430064, Peoples R China
3.Minist Agr & Rural Affairs, Key Lab Microbial Pesticides, Wuhan 430064, Peoples R China
关键词： Acaricidal protein; Biomimetic silicification; Nano silica acaricide; Pest management
期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）
ISSN： 2213-2929
年卷期： 2025 年 13 卷 4 期
页码：
收录情况： SCI
摘要： The two-spotted spider mite (Tetranychus urticae) is a major pest that causes severe agricultural losses. Its resistance to chemical acaricides diminishes their effectiveness, exacerbating their misuse and environmental pollution, highlighting the need for alternative solutions. This study presented a biomimetic nano silica acaricide (BNSA) developed using a fusion protein, BAP-R5, which integrated the acaricidal protein BAP from Bacillus vallismortis NBIF-001 with the R5 peptide from Cylindrotheca fusiformis. Through ecofriendly biomimetic silicification, the BAP-R5 protein achieved high encapsulation efficiency (91.2 %-98.0 %) within nano silica matrices. The resulting BNSAs featured tunable micromorphologies from dispersed nanoparticles to dense wet gels. The formulation sustained protein release in 14 days with release rates ranging from 12.5 % to 21.0 %, and robust adhesion to both mite cuticles and fava bean leaves. Notably, the BNSAs exhibited 2.45-fold higher contact toxicity against T. urticae compared to free BAP-R5, confirming synergistic effects of nanoencapsulation. Under abiotic stress (pH 2-12, 60-80 degrees C), the BNSAs retained 67.3 %-93.9 % residual activity versus 38.2 %-71.5 % for free protein, validating their environmental resilience. These results establish a novel paradigm for precision-targeted nano pesticide design through biomimetic engineering, addressing critical challenges in sustainable agriculture.
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