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Production of Biopesticides

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Double-stranded RNA Oral Delivery Methods to Induce RNA Interference in Phloem and Plant-sap-feeding Hemipteran Insects

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A Deep Eutectic Solvent-Based Nanodelivery System for Enhanced Rice Blast Treatment.

Dekun Hu¹, Qiang Bian², Xianfu Mu¹

¹State Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for Research and Development of Fine Chemicals of Guizhou University, Guiyang 550025, China.

|June 27, 2025

Summary

Researchers developed a novel nanopesticide delivery system using deep eutectic solvents (DES) and prodrug technology. This innovative formulation enhances pesticide efficiency and protects rice crops from blast disease with minimal environmental impact.

Keywords:

crop protection deep eutectic solvent laccase inhibitor supramolecular chemistry water-based nanodelivery system

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Area of Science:

Agricultural Science
Materials Science
Nanotechnology

Background:

Pesticide utilization efficiency is critical for food security.
Minimizing carriers in nanopesticides (NMCs) through prodrug design and self-assembly offers a transformative strategy.
Current fungicide applications face challenges in deposition and off-target effects.

Purpose of the Study:

To develop a water-based nanopesticide delivery system using a target-specific pesticide and a deep eutectic solvent (DES).
To create a formulation that enhances pesticide deposition and efficacy while minimizing environmental impact.
To evaluate the performance of the developed nanopesticide against rice blast disease.

Main Methods:

A laccase inhibitor (A12) was optimized and self-assembled with an alkaline phosphatase (ALP)-responsive DES matrix into nanospheres (∼160 nm).
The A12@DES system was evaluated for preparation simplicity, droplet behavior, foliar wetting, and deposition efficiency.
In vivo efficacy against Magnaporthe oryzae and toxicity to nontarget organisms were assessed.

Main Results:

A12@DES demonstrated simple preparation, reduced splashing, enhanced wetting, and improved deposition.
The formulation showed minimal toxicity to nontarget organisms and supported rice growth.
At 200 μg/mL, A12@DES achieved superior in vivo efficacy (74.43%/85.53%) against Magnaporthe oryzae compared to commercial fungicide and A12 alone.

Conclusions:

A12@DES represents a promising water-based nanopesticide delivery system utilizing prodrug and DES technology.
This approach significantly improves fungicide utilization efficiency for rice blast control.
The study provides a reference for developing advanced, eco-friendly pesticide delivery systems.