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Kotliarevski L, Cohen R, Ramakrishnan J, Wu S, Mani KA, Amar-Feldbaum R, Yaakov N, Zelinger E, Belausov E, Shapiro-Ilan D, Glazer I, Ment D, Mechrez G. Individual Coating of Entomopathogenic Nematodes with Titania (TiO 2) Nanoparticles Based on Oil-in-Water Pickering Emulsion: A New Formulation for Biopesticides. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:13518-13527. [PMID: 36226658 DOI: 10.1021/acs.jafc.2c04424] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
This study presents a new eco-friendly formulation of entomopathogenic nematodes (EPNs) based on individual coating of EPNs with titanium dioxide (TiO2) nanoparticles (NPs) and mineral oil via oil-in-water Pickering emulsions. Mineral oil-in-water emulsions stabilized by amine-functionalized titanium dioxide (TiO2-NH2) particles were prepared. 40:60 and 50:50 oil-water volume ratios using 2 wt % TiO2-NH2 particles were found to be the most stable emulsions with a droplet size suitable for the formulation and were further studied for their toxicity against the incorporated EPNs. Carboxyfluorescein was covalently bonded to TiO2-NH2 NPs, and the resulting composite was observed via fluorescence confocal microscopy. The dry coating was evaluated using SEM and confocal microscopy, which showed significant nematode coverage by the particles and oil. The final formulation was biocompatible with the studied EPNs, where the viability of the EPNs in the formulation was equivalent to control aqueous suspension after 120 days. Finally, yields of nematodes from infected Galleria mellonella cadavers collected for 150 days showed no significant differences (P > 0.05) using the tested emulsions compared to the control containing nematodes in water.
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Affiliation(s)
- Liliya Kotliarevski
- Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
- The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot7610001, Israel
| | - Raz Cohen
- Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
- The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot7610001, Israel
| | - Jayashree Ramakrishnan
- The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot7610001, Israel
- Department of Plant Pathology and Weed Research, Institute of Plant Protection, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
| | - Shaohui Wu
- Department of Entomology, University of Georgia, 120 Cedar St, Athens, Georgia30602, United States
| | - Karthik Ananth Mani
- Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
- The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot7610001, Israel
| | - Reut Amar-Feldbaum
- Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
| | - Noga Yaakov
- Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
| | - Einat Zelinger
- The Interdepartmental Equipment Unit, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot7610001, Israel
| | - Eduard Belausov
- Department of Ornamental Plants and Agricultural Biotechnology, Institute of Plant Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
| | - David Shapiro-Ilan
- U.S. Department of Agriculture, Agricultural Research Service, 21 Dunbar Rd., Byron, Georgia 31008, United States
| | - Itamar Glazer
- Agricultural Research Organization, Volcani Center, Entomology and Nematology, Gluska Zharia, 9, Bet-Dagan50250, Israel
| | - Dana Ment
- Department of Plant Pathology and Weed Research, Institute of Plant Protection, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
| | - Guy Mechrez
- Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Center, 68 HaMaccabim Road, Rishon Letzion7505101, Israel
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