The miticidal activity of silver nanoparticles towards date palm mite (Oligonychus afrasiaticus (McGregor)): efficacy, selectivity, and risk assessment
Abstract Promising bioactivities of silver nanoparticles SNP urged researchers of different specialties to evaluate their field-respective activities. Bioactivity towards agricultural pests were the subject of limited publications. In the current study, SNP were synthesized and miticidal activity wa...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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Instituto Internacional de Ecologia
2022-06-01
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| Series: | Brazilian Journal of Biology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842024000100331&tlng=en |
| _version_ | 1798040095282954240 |
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| author | S. B. Abdel Ghani M. M. Al-Azzazy S. S. Alhewairini M. A. Al-Deghairi |
| author_facet | S. B. Abdel Ghani M. M. Al-Azzazy S. S. Alhewairini M. A. Al-Deghairi |
| author_sort | S. B. Abdel Ghani |
| collection | DOAJ |
| description | Abstract Promising bioactivities of silver nanoparticles SNP urged researchers of different specialties to evaluate their field-respective activities. Bioactivity towards agricultural pests were the subject of limited publications. In the current study, SNP were synthesized and miticidal activity was evaluated towards old world date mite Oligonychus afrasiaticus (McGregor) (Acari: Tetranychidae) and an associated predatory mite Neoseiulus barkeri Hughes (Phytoseiidae). Under laboratory conditions, SNP displayed significantly higher activity towards O. afrasiaticus (LC50 was 39.7 µg/mL) than N. barkeri (LC50 was 1587.9 µg/mL) which accounts for about 40 folds of selectivity against the pest. SNP exhibited ovicidal activity against laid eggs of O. afrasiaticus (LC50 was 67.8 µg/mL). In field, SNP (at 216 µg/mL) achieved slightly higher efficiency than in laboratory study, 86.5% of population reduction of O. afrasiaticus was achieved and only 18.5% of N. barkeri population was affected. SNP suppressed hatching of 57.1% of laid eggs of O. afrasiaticus. Residues of silver were determined using ICP-OES spectrometry. Initial residues reached 1.83 µg/mL after application then declined with time passing. Estimated daily intake (EDI) reached 1.28 µg/kg/day, calculated for the highest residues obtained and the highest consumption rate of date in the world. Hazard index (Hi) was 0.17 in average. The obtained level of residues appeared to be safe in terms of acute and chronic toxicity references. |
| first_indexed | 2024-04-11T22:02:46Z |
| format | Article |
| id | doaj.art-f4744fef83e84056b0bc6608e7be66e6 |
| institution | Directory Open Access Journal |
| issn | 1678-4375 |
| language | English |
| last_indexed | 2024-04-11T22:02:46Z |
| publishDate | 2022-06-01 |
| publisher | Instituto Internacional de Ecologia |
| record_format | Article |
| series | Brazilian Journal of Biology |
| spelling | doaj.art-f4744fef83e84056b0bc6608e7be66e62022-12-22T04:00:53ZengInstituto Internacional de EcologiaBrazilian Journal of Biology1678-43752022-06-018410.1590/1519-6984.261262The miticidal activity of silver nanoparticles towards date palm mite (Oligonychus afrasiaticus (McGregor)): efficacy, selectivity, and risk assessmentS. B. Abdel Ghanihttps://orcid.org/0000-0002-6188-7448M. M. Al-Azzazyhttps://orcid.org/0000-0002-2569-8770S. S. Alhewairinihttps://orcid.org/0000-0003-2770-7412M. A. Al-Deghairihttps://orcid.org/0000-0002-3028-1486Abstract Promising bioactivities of silver nanoparticles SNP urged researchers of different specialties to evaluate their field-respective activities. Bioactivity towards agricultural pests were the subject of limited publications. In the current study, SNP were synthesized and miticidal activity was evaluated towards old world date mite Oligonychus afrasiaticus (McGregor) (Acari: Tetranychidae) and an associated predatory mite Neoseiulus barkeri Hughes (Phytoseiidae). Under laboratory conditions, SNP displayed significantly higher activity towards O. afrasiaticus (LC50 was 39.7 µg/mL) than N. barkeri (LC50 was 1587.9 µg/mL) which accounts for about 40 folds of selectivity against the pest. SNP exhibited ovicidal activity against laid eggs of O. afrasiaticus (LC50 was 67.8 µg/mL). In field, SNP (at 216 µg/mL) achieved slightly higher efficiency than in laboratory study, 86.5% of population reduction of O. afrasiaticus was achieved and only 18.5% of N. barkeri population was affected. SNP suppressed hatching of 57.1% of laid eggs of O. afrasiaticus. Residues of silver were determined using ICP-OES spectrometry. Initial residues reached 1.83 µg/mL after application then declined with time passing. Estimated daily intake (EDI) reached 1.28 µg/kg/day, calculated for the highest residues obtained and the highest consumption rate of date in the world. Hazard index (Hi) was 0.17 in average. The obtained level of residues appeared to be safe in terms of acute and chronic toxicity references.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842024000100331&tlng=enmiticidal activity of SNPOligonychus afrasiaticusNeoseiulus barkeriselectivityrisk assessment |
| spellingShingle | S. B. Abdel Ghani M. M. Al-Azzazy S. S. Alhewairini M. A. Al-Deghairi The miticidal activity of silver nanoparticles towards date palm mite (Oligonychus afrasiaticus (McGregor)): efficacy, selectivity, and risk assessment Brazilian Journal of Biology miticidal activity of SNP Oligonychus afrasiaticus Neoseiulus barkeri selectivity risk assessment |
| title | The miticidal activity of silver nanoparticles towards date palm mite (Oligonychus afrasiaticus (McGregor)): efficacy, selectivity, and risk assessment |
| title_full | The miticidal activity of silver nanoparticles towards date palm mite (Oligonychus afrasiaticus (McGregor)): efficacy, selectivity, and risk assessment |
| title_fullStr | The miticidal activity of silver nanoparticles towards date palm mite (Oligonychus afrasiaticus (McGregor)): efficacy, selectivity, and risk assessment |
| title_full_unstemmed | The miticidal activity of silver nanoparticles towards date palm mite (Oligonychus afrasiaticus (McGregor)): efficacy, selectivity, and risk assessment |
| title_short | The miticidal activity of silver nanoparticles towards date palm mite (Oligonychus afrasiaticus (McGregor)): efficacy, selectivity, and risk assessment |
| title_sort | miticidal activity of silver nanoparticles towards date palm mite oligonychus afrasiaticus mcgregor efficacy selectivity and risk assessment |
| topic | miticidal activity of SNP Oligonychus afrasiaticus Neoseiulus barkeri selectivity risk assessment |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1519-69842024000100331&tlng=en |
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