Pyrethroid Nanoparticle Formulations for Crop Protection
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Solution Overview
Problem
Pyrethroid pesticides face challenges due to their low water solubility, susceptibility to hydrolysis under alkaline conditions, limited soil mobility, and non-systemic nature, which affects their effectiveness and stability in agricultural and urban pest control applications.
Innovation Solution
Development of formulations comprising nanoparticles of polymer-associated pyrethroid compounds, which include a pyrethroid compound associated with a polyelectrolyte polymer and a dispersant or wetting agent, allowing for improved water solubility, stability, and soil mobility, and enabling systemic uptake by plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If pyrethroids are formulated with petroleum or non-petroleum based solvents and emulsifiers to improve water solubility, then water solubility is improved, but environmental persistence and stability are reduced due to hydrolysis under alkaline conditions
Solution Approach 1:
The patent changes the physical state and chemical form of pyrethroids by converting them into nanoparticles with controlled size parameters (1-1000 nm). This parameter change fundamentally alters the solubility and stability characteristics, allowing the pyrethroids to maintain stability while improving water dispersibility without relying on traditional solvent-based formulations.
Solution Approach 2:
The patent creates composite nanoparticle formulations where pyrethroids are combined with specific polymers, surfactants, and stabilizing agents. These composite structures provide both the water solubility enhancement needed for agricultural application and the chemical stability required to prevent hydrolysis under alkaline conditions, resolving the contradiction between solubility and stability.
2Productivity
If pyrethroids are applied in traditional formulations to achieve contact and stomach action on insects, then immediate pest control is achieved, but systemic activity within plants is not obtained
Solution Approach 1:
The patent segments the pyrethroid molecules into nanoparticle form, creating discrete particles that can be selectively absorbed and transported within plant tissues. This segmentation allows the formulation to maintain its insecticidal activity for contact and stomach action while simultaneously enabling systemic movement through the plant, thus achieving both immediate efficacy and long-term systemic protection.
3Duration of action of stationary object
If pyrethroids are formulated with high affinity for soil and sediment particulate matter to improve persistence, then environmental persistence is improved, but soil mobility is reduced
Solution Approach 1:
The patent applies local quality by creating nanoparticles with specific surface properties that can interact differently with various environmental components. The nanoparticle surface can be engineered to provide controlled affinity for soil particles (enhancing persistence in target areas) while maintaining sufficient mobility through water systems for distribution, thus achieving both persistence and mobility through localized property modification.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The nanoparticle formulations enhance the stability and mobility of pyrethroids, leading to improved efficacy against pests, increased persistence under UV light, and enhanced systemic activity within plants, thereby addressing the limitations of traditional pyrethroid formulations.
Implementation Method 1
nanoparticles of polymer-associated pyrethroid compounds along with various formulating agents. The present disclosure also provides methods for producing and using these formulations.
Implementation Method 2
the polymer is a polyelectrolyte, and a dispersant or a wetting agent
Data Source
AI summary
The present disclosure provides formulations of pyrethroid compounds comprising nanoparticles of polymer-associated pyrethroid compounds along with various formulating agents. The present disclosure also provides methods for producing and using these formulations. The disclosure describes various formulations and formulating agents that can be included in the formulations. Additionally, the disclosures describes application to various plants and pests as well as advantages of the disclosed formulations.