Journal
ECOMAT
Volume 2, Issue 2, Pages -Publisher
WILEY
DOI: 10.1002/eom2.12028
Keywords
biopesticides; dual adhesion; mesoporous silica; pest control; silica nanoparticles
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Funding
- Australian Microscopy and Microanalysis Research Facility at the Centre for Microscopy and Microanalysis, the University of Queensland
- Australian National Fabrication Facility
- Queensland Government
- Australian Research Council
- Boehringer Ingelheim Animal Health Australia Pty Ltd
- Elanco Animal Health
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Biopesticides, such as spinosad, are a new-generation of ecofriendly pesticides in livestock industry. However, spinosad suffers from short duration of effectiveness and low potency in field conditions. Herein we report the development of a new nanospinosad design with dual adhesion and protection functions. Silica nanoparticles with spiky nanotopography loaded with spinosad possess rough surfaces. When applied topically, this nanospinosad formulation exhibited enhanced adhesion to both cattle hair and pest surface. The dual adhesion property led to significantly higher pest mortality toward tick (Rhipicephalus microplus, an ectoparasite) than a nanospinosad formulation using nanoparticles with smooth surface and a benchmark commercial product. The adhesion performance was further quantitatively measured using rainfastness test. Moreover, solar radiation test revealed that the nanospinosad exhibited >10 times higher photostability over the commercial product. This work paves the way toward the development of high performance nanobiopesticides for sustainable agricultural applications.
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