Issue 23, 2024

Aldehyde-containing clays: a sustainable approach against the olive tree pest, Bactrocera oleae

Abstract

A set of organic/inorganic layered materials was obtained by functionalizing a montmorillonite-containing bentonite natural clay with linear aliphatic C6 or C7 aldehydes through a cost-effective and technologically simple incipient-wetness deposition method. The solids were investigated by means of a multi-technique approach (X-ray powder diffraction, XRPD, scanning electron microscopy, SEM, Fourier-transform infrared spectroscopy, FT-IR, thermogravimetric analysis, TGA, elemental analysis and solid-state nuclear magnetic resonance, ssNMR) to clarify the nature of the deposited organic species and the mode of interaction between the aldehyde and the clay. Since both natural clays and short-chain linear aldehydes find application as alternative strategies in the control of the olive fruit fly, Bactrocera oleae, the hybrid layered materials were tested under real-life conditions and their insect-inhibiting capability was evaluated in open-field trials on olive tree orchards in Tuscany, Central Italy. Specific tests were conducted to evaluate the resistance of the solids to weathering and their capability to provide a constant and long-lasting release of the bioactive ingredient. Aldehyde-containing bentonite clays have shown promising performance in controlling B. oleae infestation (with up to 86–95% reduction of affected olive fruits) in open-field trials across two years in two locations with different pedological and meteo-climatic characteristics.

Graphical abstract: Aldehyde-containing clays: a sustainable approach against the olive tree pest, Bactrocera oleae

Supplementary files

Article information

Article type
Paper
Submitted
08 Mar 2024
Accepted
20 May 2024
First published
22 May 2024
This article is Open Access
Creative Commons BY-NC license

Dalton Trans., 2024,53, 9995-10006

Aldehyde-containing clays: a sustainable approach against the olive tree pest, Bactrocera oleae

S. Econdi, C. Bisio, F. Carniato, S. Marchesi, G. Paul, E. Gargani, I. Cutino, A. Caselli and M. Guidotti, Dalton Trans., 2024, 53, 9995 DOI: 10.1039/D4DT00705K

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