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<p>In current scenario, the nanotechnology is a promising field for the management of insect pests. Different approaches are used for synthesis of nanoparticles (NPs) viz. chemical, physical and biological but among all of them the biological approach is ecofriendly, cost-effective, safe and fast. To cope over the resistance issue in <i>Bemisia tabaci</i> against synthetic insecticides, the current study was aimed to evaluate the entomocidal potential of green synthesized titanium dioxide nanoparticles (TiO<sub>2</sub> NPs) from <i>Aloe vera</i> extract against 3rd nymphal instar and adult of <i>B. tabaci</i>. The highest mortality 60.22% at 1200 ppm after 96&#xa0;h post treatment application while the relatively less mortality 52.00, 44.88 and 33.66% were observed at 1200 ppm after 72, 48 and 24&#xa0;h exposure time against 3rd nymphal instar of <i>B. tabaci</i> respectively. In case of adult bioassay, the extreme mortality 57.77% were recorded at 1200 ppm after 96&#xa0;h time period whereas the low mortality 56.66, 42.22 and 33.33% were perceived at 1200 ppm after 72, 48 and 24&#xa0;h exposure period of time respectively. The least mortality 8.33 and 10.00% were noted at 200 ppm after 24&#xa0;h time interval against 3rd nymphal instar and adult of <i>B. tabaci</i> respectively. The LC<sub>50</sub> values data exhibited that the LC<sub>50</sub>= 873.192 and LC<sub>50</sub>= 862.171 ppm were required to kill the 50% of tested 3rd nymphal instar and adult population after 96&#xa0;h exposure time respectively. The presence of terpenoids, flavonoid and proteins in <i>Aloe vera</i> extract act as reducing and capping agent in the synthesis process. The average particles size of green synthesized nanoparticles was 97&#xa0;nm while the shape of NPs was spherical, rod and irregular shape. The overall results showed that the biologically synthesized nanoparticles are very effective tool for the sustainable management of notorious pest <i>B. tabaci</i>. The nanoparticles based biopesticides are an alternative to synthetic chemical insecticides and no study has already been reported on application of titanium dioxide nanoparticles against various life stages of <i>B. tabaci</i>.</p>

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Entomocidal effect of green synthesized titanium dioxide nanoparticles using Aloe vera Extract against Bemisia tabaci (Homoptera: Aleyrodidae)

  • 期刊论文

  • 发表日期：

    2026年7月13日

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  • Muhammad Shahid,
  • Unsar Naeem-Ullah,
  • Waheed S. Khan,
  • Shafqat Saeed,
  • Kashif Razzaq

摘要

In current scenario, the nanotechnology is a promising field for the management of insect pests. Different approaches are used for synthesis of nanoparticles (NPs) viz. chemical, physical and biological but among all of them the biological approach is ecofriendly, cost-effective, safe and fast. To cope over the resistance issue in Bemisia tabaci against synthetic insecticides, the current study was aimed to evaluate the entomocidal potential of green synthesized titanium dioxide nanoparticles (TiO2 NPs) from Aloe vera extract against 3rd nymphal instar and adult of B. tabaci. The highest mortality 60.22% at 1200 ppm after 96 h post treatment application while the relatively less mortality 52.00, 44.88 and 33.66% were observed at 1200 ppm after 72, 48 and 24 h exposure time against 3rd nymphal instar of B. tabaci respectively. In case of adult bioassay, the extreme mortality 57.77% were recorded at 1200 ppm after 96 h time period whereas the low mortality 56.66, 42.22 and 33.33% were perceived at 1200 ppm after 72, 48 and 24 h exposure period of time respectively. The least mortality 8.33 and 10.00% were noted at 200 ppm after 24 h time interval against 3rd nymphal instar and adult of B. tabaci respectively. The LC50 values data exhibited that the LC50= 873.192 and LC50= 862.171 ppm were required to kill the 50% of tested 3rd nymphal instar and adult population after 96 h exposure time respectively. The presence of terpenoids, flavonoid and proteins in Aloe vera extract act as reducing and capping agent in the synthesis process. The average particles size of green synthesized nanoparticles was 97 nm while the shape of NPs was spherical, rod and irregular shape. The overall results showed that the biologically synthesized nanoparticles are very effective tool for the sustainable management of notorious pest B. tabaci. The nanoparticles based biopesticides are an alternative to synthetic chemical insecticides and no study has already been reported on application of titanium dioxide nanoparticles against various life stages of B. tabaci.