Bio-based polymeric nanoparticles for improved weed control through controlled-release nanoherbicides

Overview

This solution offers bio-based polymeric nanoparticles designed to encapsulate herbicides, enabling more effective and sustainable weed control in agricultural settings. By leveraging the small size and tailored surface properties of nanomaterials, the technology increases foliar adhesion on weeds and improves the physicochemical stability of active ingredients. A controlled-release mechanism delivers herbicides precisely where they are needed, reducing the total dose required and minimizing bioaccumulation in non-target organisms. This approach addresses growing demand for agrochemical innovations that balance productivity with environmental responsibility.

Technical specifications

• Bio-based nanocarriers composed of natural polymers such as lignin and chitosan, offering renewable and biodegradable encapsulation materials
• High encapsulation efficiency for a range of herbicide active ingredients
• Good colloidal stability in aqueous formulations suitable for foliar application
• Enhanced foliar adhesion due to nanoscale particle size, improving coverage and retention on weed surfaces
• Controlled-release behavior that delivers active ingredients gradually at the target site
• Potential for dose reduction, lowering environmental load and limiting bioaccumulation in non-target species
• Applicability to pest management and weed control in agricultural production systems

Technology readiness level

The Environmental NanoChemistry laboratory has already designed and characterized several bio-based nanocarriers for controlled release of agrochemicals, including lignin- and chitosan-based nanoparticles encapsulating different herbicides. These systems have demonstrated good colloidal stability and encapsulation efficiency, with promising indications for weed management. The next validation phase requires a dedicated greenhouse to evaluate nanoherbicide effects on weeds under controlled conditions, along with equipment to assess plant physiological and biochemical responses at varying nanomaterial doses. The team is actively seeking partnership support for these experiments, equipment acquisition, and key personnel funding to advance the technology toward field-ready status.