Biodegradable lignocellulosic matrices for sustained agrochemical delivery

Overview

Indiscriminate pesticide use contributes to environmental pollution, pest resistance, loss of biodiversity, and significant economic losses. Controlled-release delivery systems can slow active ingredient release, reduce photodegradation, and minimize environmental footprints. This solution offers biodegradable lignocellulosic matrices fabricated from agricultural biomass waste as sustainable carriers for agrochemicals. The bio-based and biodegradable nature of these matrices also supports carbon farming objectives. Field trials in potato and yam cultivation in sub-Saharan Africa have demonstrated slow, sustained release of the anthelmintic abamectin to control root knot and potato cyst nematodes, with notable reductions in plant-parasitic nematode populations even when matrices carry no active ingredient.

Technical specifications

Key features:

• Fibrous lignocellulosic matrices produced from plant harvest waste via a solvent-free, additive-free robust fabrication process
• Tunable porosity and strength allowing customization based on soil type, crop, and active ingredient
• Controlled uptake, release, and decomposition profiles for multicomponent delivery
• Capability to carry minimal active loads while maintaining efficacy
• Demonstrated efficacy in wrapping around seeds or seed pieces for nematode control
• Compatibility with biorational biopesticides and soil health products such as Actinovate and Myco Apply

Technology readiness level

The matrices have been validated in sub-Saharan African field trials on potato and yam crops, demonstrating sustained abamectin release and nematode population reduction. Future work includes broadening the range of compatible active ingredients and crops, optimizing morphology through varied processing conditions, incorporating biomass from diverse origins, and studying active-matrix interactions to refine uptake and release profiles.