The Acaricidal Impact of Green Synthesized Zinc Oxide Nanoparticles Against Caloglyphus mycophagous and Mycetoglyphus fungivorus (Family:Acaridae)

Document Type : Original Article

Authors

1 Department of Pests and Plant Protection, National Research Centre, 12622, Cairo, Egypt

2 Department of Animal Production, National Research Centre, 12622, Cairo, Egypt.

Abstract

In an era of eco-friendly development, the green synthesis of metal nanoparticles using plant extracts has become a focus of researcher attention. The present work introduces method of a green synthesis of Zinc oxide nanoparticles (G ZnO NPs) using orange peel extract and their size and morphology were examined using high resolution transmission electron microscope (HRTEM). Additionally, its impact in comparison with chemically synthesized Zinc oxide nanoparticles (C ZnO NPs) was examined on females, nymphs and larvae of stored grain mites Caloglyphus mycophagous (Megnin) and Mycetoglyphus fungivorus Oudemans. Stored mites are responsible for notable losses of cereals including wheat, rice, soybeans and maize which are among the essential agricultural goods that contribute to the bulk of a global food security basis. Three different concentrations of both types of ZnO NPs (10, 30 and 60 ppm) were utilized. The mortality rate (%) was recorded after 24, 48, 72 and 96 hour (h) post-exposure to each tested concentration. The results of high-resolution transmission electron microscope showed that the size of C and G ZnO NPs were 35 and 3 nm, respectively. Both types of ZnO NPs showed toxicity against tested stages and the mortality rates were increased by concentration and exposure time increase. Chemical ZnO NPs was more effective than G ZnO NPs to all stages of mites post -initial exposures, and then all had the same effect by passing time. Females and nymphs of both tested mites recorded 100% mortality after 72h post-exposure to 60 ppm of both ZnO NPs, while larvae of M. fungivorus recorded this mortality percentage after 24h post-exposure to all tested concentrations of each ZnO NPs except with G ZnO NPs at 10ppm, the mortality was (90%). The same result (100%) was observed in C. mycophagous larvae after 48h post-exposure. The deposited eggs by treated females of each mite were highly significantly decreased and did not hatch at all. Strong adherences of tested ZnO NPS were visualized clearly attached to different parts of dead females by images of Scanning Electron Microscopy (SEM). The result of this work suggests that G ZnO NPs are effective candidate agents against storage mites.

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Egyptian Journal of Chemistry
Volume 66, Issue 13 - Serial Number 13
Special Issue: Applied Chemistry for Greener Life and Sustainability
December 2023
Pages 1125-1131

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History

  • Receive Date: 09 April 2023
  • Revise Date: 04 May 2023
  • Accept Date: 21 May 2023

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