Eugenol nanoemulsion as bio‑fumigant: enhanced insecticidal activity against the rice weevil, Sitophilus oryzae adults.

Samar Sayed, Ibrahim and Urvashi, Sahu and Karthik, P. and Ezhilvendan, S. (2023) Eugenol nanoemulsion as bio‑fumigant: enhanced insecticidal activity against the rice weevil, Sitophilus oryzae adults. Journal of Food Science and Technology, 60 (4). pp. 1435-1445. ISSN 0022-1155

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Abstract

Nanoemulsion is a promising delivery system for delivering the plant bioactive molecules against insect pests. In this study, we aimed to prepare eugenol based nanoe�mulsions (EL-NE) by ultrasonication method to investigate its fumigant toxicity against Sitophilus oryzae adults and to analyse the residual characteristics of eugenol bioactive on the treated grains and beetles. In EL-NE preparations, 1:1 ratio of eugenol: Tween 80 combination with 5 min of ultrasonication at frequency of 10 kHz and 12 W power output was determined as optimal. In the optimized nanoe�mulsions, 19.21 to 42.82 d.nm range of mean droplet size, 0.50 to 0.77 range of polydispersity index and −21.80 to −29.83 mV range of zeta potential values were observed with respect to 2.5 to 10.0% of eugenol concentrations. After 72 h of fumigation, enhanced fumigant toxicities (3.5–11.2 fold) were observed against S. oryzae adults for the opti�mized EL-NEs compared to eugenol alone. Fumigant toxic�ity results revealed 14.40 µl/L air of least LC50 value for the 10.0% EL-NE. Persistence of eugenol was more (12.46%) in EL-NE treated wheat grains compared to eugenol alone treatments based on Gas Chromatography–Mass Spectros�copy analysis, which indicates the improved fumigation. This study results suggests EL-NEs as promising nano�biofumigant against the S. oryzae adults for eco-friendly Integrated Pest Management (IPM).

Item Type:	Article
Uncontrolled Keywords:	Nanoemulsion, bio‑fumigant, rice weevil, Sitophilus oryzae, plant bioactive molecules, insect pests
Subjects:	500 Natural Sciences and Mathematics > 10 Plants 600 Technology > 03 Agriculture > 05 Insect/Pest Control
Divisions:	Food Protectants and Infestation Control
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	24 May 2023 11:10
Last Modified:	24 May 2023 11:10
URI:	http://ir.cftri.res.in/id/eprint/16459

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