Encapsulation of Bacillus thuringiensis in an inverse Pickering emulsion for pest control applications.

Bacillus thuringiensis Emulsions / chemistry Pest Control Silicon Dioxide Water / chemistry
Bacillus thuringien serovar aizawai Crystal Encapsulation Microbial control Pickering emulsion Silica Spodoptera littoralis Spore Water-in-oil

Journal

Colloids and surfaces. B, Biointerfaces
ISSN: 1873-4367
Titre abrégé: Colloids Surf B Biointerfaces
Pays: Netherlands
ID NLM: 9315133

Informations de publication

Date de publication:
May 2022
Historique:
received: 09 01 2022
revised: 17 02 2022
accepted: 21 02 2022
pubmed: 28 2 2022
medline: 20 4 2022
entrez: 27 2 2022
Statut: ppublish

Résumé

Here, we present an inverse Pickering emulsion-based formulation for Bacillus thuringiensis serovar aizawai (BtA) encapsulations utilized towards pest control applications. The emulsification was carried out by high shear homogenization process via ULTRA-TURRAX®. The water-in-mineral oil emulsions were stabilized by commercial hydrophobic silica. Different silica contents and water/oil ratios were studied. Stable emulsions were obtained at 2 and 3 wt% silica at 30% and 20% water volumes, respectively. The structure of the Pickering emulsions were characterized by laser scanning confocal microscopy and cryogenic scanning electron microscopy. The BtA cells, spores and crystals were encapsulated in the water droplets of the inverse Pickering emulsions. An emulsion composed of 3 wt% silica and 30% water was found to be the most suitable for encapsulation. The pest control efficiency of the encapsulated BtA against Spodoptera littoralis first instar larvae was tested. The studied BtA/emulsion system exhibited a mortality rate of 92%. However, the non-formulated BtA has shown 71% mortality, and the emulsion alone resulted in only 9% mortality. These findings confirm that an emulsion with encapsulated BtA can function as an efficient formulation for biopesticides.

Identifiants

DOI: 10.1016/j.colsurfb.2022.112427 PMID: 35219966
pubmed: 35219966
pii: S0927-7765(22)00110-2
doi: 10.1016/j.colsurfb.2022.112427
pii:
doi:

Substances chimiques

Emulsions 0
Water 059QF0KO0R
Silicon Dioxide 7631-86-9

Types de publication

Journal Article

Langues

eng

Sous-ensembles de citation

IM

Pagination

112427

Informations de copyright

Copyright © 2022 Elsevier B.V. All rights reserved.

Auteurs

Noga Yaakov (N)

Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZion 7505101, Israel.

Chandrasekhar Kottakota (C)

Department of Plant Pathology and Weed Research, Institute of Plant Protection, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZion 7505101, Israel; Department of Biochemistry and Biotechnology, Sri Krishnadevaraya College of Agricultural Sciences (SKCAS), Anantapurum, Andhra Pradesh, 515002, Affiliated to Acharya N.G. Ranga Agricultural University (ANGRAU), Guntur, Andhra Pradesh 522034, India.

Karthik Ananth Mani (KA)

Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZion 7505101, Israel; Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot 7610001, Israel.

Shoham Matsrafi Naftali (SM)

Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZion 7505101, Israel; Institute of Biochemistry, Food Science and Nutrition, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot 7610001, Israel.

Einat Zelinger (E)

The Interdepartmental Equipment Unit, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, POB 12, Rehovot 7610001, Israel.

Michael Davidovitz (M)

Department of Entomology, Institute of Plant Protection, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZion 7505101, Israel.

Dana Ment (D)

Department of Plant Pathology and Weed Research, Institute of Plant Protection, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZion 7505101, Israel.

Guy Mechrez (G)

Department of Food Sciences, Institute of Postharvest and Food Sciences, Agricultural Research Organization (ARO), Volcani Institute, Rishon LeZion 7505101, Israel. Electronic address: guyme@agri.gov.il.

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Classifications MeSH

questionsmedicales.fr › Bactéries › Bactéries à Gram positif › Bâtonnets à Gram positif › Bâtonnets sporulés à Gram positif › Bacillaceae › Bacillus › Bacillus thuringiensis › Encapsulation of Bacillus thuringiensis in an...
questionsmedicales.fr › Préparations pharmaceutiques › Colloïdes › Émulsions › Encapsulation of Bacillus thuringiensis in an...
questionsmedicales.fr › Environnement et santé publique › Santé publique › Pratiques en santé publique › Contrôle des maladies transmissibles › Lutte contre les nuisibles › Encapsulation of Bacillus thuringiensis in an...
questionsmedicales.fr › Produits chimiques inorganiques › Composés du silicium › Silice › Encapsulation of Bacillus thuringiensis in an...
questionsmedicales.fr › Produits chimiques inorganiques › Composés de l'oxygène › Oxydes › Eau › Encapsulation of Bacillus thuringiensis in an...