CaCO3-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants
The red imported fire ants (RIFAs) are a globally important invasive pest that severely affects the ecosystem and human health, and its current control is primarily through chemical pesticides. However, the extensive use of chemical pesticides causes environmental problems, and alternative strategie...
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Elsevier
2025-01-01
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| Series: | Ecotoxicology and Environmental Safety |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0147651325000454 |
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| author | Jiantao Fu Junfang Wang Zewen Ma Di Yuan Yunfei Zhang Lanying Wang Yanping Luo |
| author_facet | Jiantao Fu Junfang Wang Zewen Ma Di Yuan Yunfei Zhang Lanying Wang Yanping Luo |
| author_sort | Jiantao Fu |
| collection | DOAJ |
| description | The red imported fire ants (RIFAs) are a globally important invasive pest that severely affects the ecosystem and human health, and its current control is primarily through chemical pesticides. However, the extensive use of chemical pesticides causes environmental problems, and alternative strategies for controlling this pest are being explored. In our study, we aimed to design a deep eutectic solvent (DES)–CaCO3 system in which RIFAs were used as target insects to increase the lethal activity and behavioural regulation effects on RIFAs via contact and feeding. Indoxacarb (IDC) was made into DESs with three fatty acids, oleic acid (OA), linoleic acid (LA), and linolenic acid (LNA), which showed a significant increase in lethal activity against worker ants compared with IDC. OA@IDC@CaCO3, LA@IDC@CaCO3, and LNA@IDC@CaCO3 nanoparticles were prepared via interfacial precipitation. Characterization of the structures of the three pesticide-carrying nanoparticles revealed that all three fatty acid eutectic solvents formed spherical CaCO3 nanoparticles, with average particle sizes between 0.59 and 0.90 μm, which increased with increasing degree of fatty acid unsaturation. The pesticide loading ranged from 2.13 %⁓3.43 %, and the surfaces were all positively charged and well dispersed. OA@IDC@CaCO3 was relatively more effective and was able to dramatically inhibit the abandonment and foraging behaviours of RIFAs, prolong the time required for these behaviours, and decrease the number of feeding worker ants and the amount of food consumed. OA@IDC@CaCO3 was subsequently compounded with diatomaceous earth (DA), and spiked into baits, which significantly increased the contact and feeding activity of worker ants, inhibited the feeding, digging, and corpse-discarding behaviours of RIFAs. In the field trial, the combined control effect of the DA + OA@IDC@CaCO3 group was 83.38 %, which was greater than the 69.65 % of the commercial agent control group. In this study, IDC bait was co-prepared by using acid as a comelting solvent, CaCO3 as a coating, and DA as a pesticide adjuvant, which improved the activity against RIFAs, prolonged the holding period of IDC, and improved the prevention and control of RIFAs. Therefore, our research provides a simple and feasible approach for designing and constructing novel nanopesticides for RIFAs control. |
| format | Article |
| id | doaj-art-9f1a0c396070484d8af21ccc69aa55ba |
| institution | Kabale University |
| issn | 0147-6513 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ecotoxicology and Environmental Safety |
| spelling | doaj-art-9f1a0c396070484d8af21ccc69aa55ba2025-01-23T05:26:11ZengElsevierEcotoxicology and Environmental Safety0147-65132025-01-01289117709CaCO3-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire antsJiantao Fu0Junfang Wang1Zewen Ma2Di Yuan3Yunfei Zhang4Lanying Wang5Yanping Luo6School of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 570228, China; Institute of Nanfan & Seed Industry, Guangdong Academy of Sciences, Guangzhou, Guangdong 510316, ChinaSchool of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 570228, ChinaSchool of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 570228, ChinaSchool of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 570228, ChinaSchool of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 570228, ChinaSchool of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 570228, ChinaSchool of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan 570228, China; Correspondence to: School of Tropical Agriculture and Forestry, Hainan University, Danzhou, Hainan, China.The red imported fire ants (RIFAs) are a globally important invasive pest that severely affects the ecosystem and human health, and its current control is primarily through chemical pesticides. However, the extensive use of chemical pesticides causes environmental problems, and alternative strategies for controlling this pest are being explored. In our study, we aimed to design a deep eutectic solvent (DES)–CaCO3 system in which RIFAs were used as target insects to increase the lethal activity and behavioural regulation effects on RIFAs via contact and feeding. Indoxacarb (IDC) was made into DESs with three fatty acids, oleic acid (OA), linoleic acid (LA), and linolenic acid (LNA), which showed a significant increase in lethal activity against worker ants compared with IDC. OA@IDC@CaCO3, LA@IDC@CaCO3, and LNA@IDC@CaCO3 nanoparticles were prepared via interfacial precipitation. Characterization of the structures of the three pesticide-carrying nanoparticles revealed that all three fatty acid eutectic solvents formed spherical CaCO3 nanoparticles, with average particle sizes between 0.59 and 0.90 μm, which increased with increasing degree of fatty acid unsaturation. The pesticide loading ranged from 2.13 %⁓3.43 %, and the surfaces were all positively charged and well dispersed. OA@IDC@CaCO3 was relatively more effective and was able to dramatically inhibit the abandonment and foraging behaviours of RIFAs, prolong the time required for these behaviours, and decrease the number of feeding worker ants and the amount of food consumed. OA@IDC@CaCO3 was subsequently compounded with diatomaceous earth (DA), and spiked into baits, which significantly increased the contact and feeding activity of worker ants, inhibited the feeding, digging, and corpse-discarding behaviours of RIFAs. In the field trial, the combined control effect of the DA + OA@IDC@CaCO3 group was 83.38 %, which was greater than the 69.65 % of the commercial agent control group. In this study, IDC bait was co-prepared by using acid as a comelting solvent, CaCO3 as a coating, and DA as a pesticide adjuvant, which improved the activity against RIFAs, prolonged the holding period of IDC, and improved the prevention and control of RIFAs. Therefore, our research provides a simple and feasible approach for designing and constructing novel nanopesticides for RIFAs control.http://www.sciencedirect.com/science/article/pii/S0147651325000454Red imported fire antsDeep eutectic solventIndoxacarbCaCO3-loaded nanoparticlesDiatomaceous earth |
| spellingShingle | Jiantao Fu Junfang Wang Zewen Ma Di Yuan Yunfei Zhang Lanying Wang Yanping Luo CaCO3-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants Ecotoxicology and Environmental Safety Red imported fire ants Deep eutectic solvent Indoxacarb CaCO3-loaded nanoparticles Diatomaceous earth |
| title | CaCO3-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants |
| title_full | CaCO3-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants |
| title_fullStr | CaCO3-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants |
| title_full_unstemmed | CaCO3-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants |
| title_short | CaCO3-coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants |
| title_sort | caco3 coated indoxacarb deep eutectic solvent complexed with diatomaceous earth improves insecticidal activity against the red imported fire ants |
| topic | Red imported fire ants Deep eutectic solvent Indoxacarb CaCO3-loaded nanoparticles Diatomaceous earth |
| url | http://www.sciencedirect.com/science/article/pii/S0147651325000454 |
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