Insecticidal Impact of some Natural Oils and their Nano -Emulsions on Sitophileus oryzae | ||
| Journal of Plant Protection and Pathology | ||
| Article 1, Volume 14, Issue 12, December 2023, Pages 379-385 PDF (1.12 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jppp.2023.235522.1176 | ||
| Authors | ||
| S. A. Hamed* 1; H. A. Anber1; G. M. M. Zayed2; H. A. Frawila1; Hanaa A. Nasseem1 | ||
| 1Plant Protection Dept. (Pesticides), Fac. of Agric., Tanta Univ. Egypt | ||
| 2Plant Protection Res. Inst., Agric. Res. Center, Dokki, Giza, Egypt | ||
| Abstract | ||
| In vitro studies were conducted to evaluate the effects of essential oils (EOs), Cymbopogon citratus, Syzygium aromaticum and their nano-emulsion (NEs) by mixing with grains against Sitophilus oryzae (L.). Malathion was used as a standard reference and had the highest adverse effect among those followed by NEs and EOs, since % mortality, % reduction of progeny S. oryzae adults raised,and % loss of wheat grains decreased with high concentration and time. Malathion has a highly toxic effect, followed by NEs and EOs, where the LC50 values of malathion, S. aromaticum nano-emulsion, C. citratus nano-emulsion, S. aromaticum oil and C. citratus oil were (835.6 & 277.0), (15166.4 & 9516.3), (18817.0 & 13333.4), (17232.7 & 10371.5) and (45342.6 & 15706.1) after one and two weeks, respectively. The mortality rate for malathion was 95%, followed by the nano-emulsions S. aromaticum and C. citratus (83.3 and 70.0%) and EOs (76.7 and 66.0%), respectively. While the percentage of reduction in progeny at the high concentration of malathion was 93.5, and was 94.6 and 76.6% for NEs, and 91.8 and 83.7% for EOs, respectively. Moreover, Malathion had the lowest percentage of wheat grain weight loss, followed by NEs and EOs, compared to the untreated control (29%). Furthermore, NEs have a lower percentage of germination wheat grains. Finally, the use of NEs is a promising eco-friendly tool for the control of S. oryzae . | ||
| Keywords | ||
| S.oryzae; natural oils; nano-emulsion | ||
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