Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/135191
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Type: | Journal article |
Title: | Evaluation of baiting fipronil-loaded silica nanocapsules against termite colonies in fields |
Author: | Peters, B.C. Wibowo, D. Yang, G.Z. Hui, Y. Middelberg, A.P.J. Zhao, C.X. |
Citation: | Heliyon, 2019; 5(8):e02277-1-e02277-10 |
Publisher: | ELSEVIER SCI LTD |
Issue Date: | 2019 |
ISSN: | 2405-8440 2405-8440 |
Statement of Responsibility: | Brenton C. Peters, David Wibowo, Guang-Ze Yang Yue Hui, Anton P.J. Middelberg, Chun-Xia Zhao |
Abstract: | Various pesticide nanocarriers have been developed. However, their pest-control applications remain limited in laboratories. Herein, we developed silica nanocapsules encapsulating fipronil (SNC) and their engineered form, poly(ethyleneimine)-coated SNC (SNC-PEI), based on recombinant catalytic modular protein D4S2 and used them against termite colonies Coptotermes lacteus in fields. To achieve this, an integrated biomolecular bioprocess was developed to produce D4S2 for manufacturing SNC containing fipronil with high encapsulation efficiency of approximately 97% at benign reaction conditions and at scales sufficient for the field applications. PEI coating was achieved via electrostatic interactions to yield SNC-PEI with a slower release of fipronil than SNC without coating. As a proof-of-concept, bait toxicants containing varied fipronil concentrations were formulated and exposed to nine termite mounds, aiming to prolong fipronil release hence allowing sufficient time for termites to relocate the baits into and distribute throughout the colony, and to eliminate that colony. Some baits were relocated into the mounds, but colonies were not eliminated due to several reasons. We caution others interested in producing bait toxicants to be aware of the multilevel resistance mechanisms of the Coptotermes spp. “superorganism”. |
Keywords: | Chemical engineering Nanotechnology Nanocapsules Sustained release Pesticide delivery system Fipronil Subterranean termites Composite materials Encapsulation technology Molecular engineering Nanoparticles |
Rights: | © 2019 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by- nc-nd/4.0/). |
DOI: | 10.1016/j.heliyon.2019.e02277 |
Grant ID: | http://purl.org/au-research/grants/arc/FT140100726 http://purl.org/au-research/grants/arc/DP150100798 |
Published version: | http://dx.doi.org/10.1016/j.heliyon.2019.e02277 |
Appears in Collections: | Chemical Engineering publications |
Files in This Item:
File | Description | Size | Format | |
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hdl_135191.pdf | Published version | 1.82 MB | Adobe PDF | View/Open |
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