Anthranilic Diamide Insecticide Absorption via Surfactant Mediator
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Solution Overview
Problem
Anthranilic diamide insecticides face challenges in achieving sufficient absorption into geotropic propagules and developing roots due to low water solubility, leading to ineffective concentrations in protecting plants from phytophagous insect pests, especially as plant tissue volume expands and dilutes the insecticide concentration.
Innovation Solution
A composition comprising anthranilic diamides combined with nonionic ethylene oxide-propylene oxide block copolymers, which enhances the absorption and distribution of anthranilic diamides into propagules and developing roots, ensuring insecticidally effective concentrations in both propagules and foliage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If anthranilic diamide insecticides are applied to propagules, then insect protection is achieved, but low water solubility impedes absorption and mobilization into the propagule and developing roots
Solution Approach 1:
The patent introduces a nonionic surfactant as an intermediary substance that facilitates the absorption and mobilization of anthranilic diamide insecticides. The surfactant acts as a mediator between the hydrophobic insecticide and the aqueous environment, enabling effective transport into the propagule and developing roots despite the insecticide's low inherent water solubility
2Reliability
If greater amounts of anthranilic diamides are applied to achieve effective concentrations in expanding foliage, then protection of distant foliage is improved, but the cost and potential phytotoxicity increase
Solution Approach 1:
The patent applies the preliminary action principle by treating the propagule with the surfactant-insecticide composition before plant establishment. This early application ensures that the insecticide is absorbed and translocated systemically as the plant grows, providing proactive protection throughout the growing season rather than requiring repeated applications or higher initial doses
Solution Approach 2:
The nonionic surfactant serves as a mediator that enhances the bioavailability and translocation efficiency of the anthranilic diamide, allowing effective distribution to expanding foliage without requiring increased application rates
3Reliability
If anthranilic diamides are applied to propagules, then protection against phytophagous insect pests is achieved, but the insecticides are vulnerable to absorption and dissipation through the growing medium before absorption into the propagule
Solution Approach 1:
The nonionic surfactant acts as a protective intermediary that forms a soluble complex with the anthranilic diamide, reducing its susceptibility to dissipation in the growing medium. This surfactant-mediated formulation protects the insecticide during the critical period before propagule absorption, ensuring sufficient active ingredient remains available for uptake
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 composition effectively protects geotropic propagules and derived plants from phytophagous insect pests by facilitating the absorption and distribution of anthranilic diamides, maintaining effective concentrations even as plant tissue expands.
Implementation Method 1
from about 9 to about 91% of a nonionic ethylene oxide-propylene oxide block copolymer component having a water solubility of at least about 5% by weight at 20° C., a hydrophilic-lipophilic balance value of at least about 5
Data Source
AI summary
Disclosed is an insecticidal composition comprising by weight based on the total weight of the composition:(a) from about 9 to about 91% of one or more anthranilic diamide insecticides; and(b) from about 9 to about 91% of a nonionic ethylene oxide-propylene oxide block copolymer component having a water solubility of at least about 5% by weight at 20° C., a hydrophilic-lipophilic balance value of at least about 5 and an average molecular weight ranging from about 1500 to about 20000 daltons;wherein the ratio of component (b) to component (a) is about 1:10 to about 10:1 by weight.Also disclosed is a geotropic propagule coated with an insecticidally effective amount of the aforedescribed composition. Further disclosed is a liquid composition consisting of about 5 to 80 weight % of the aforedescribed composition and about 20 to 95 weight % of a volatile aqueous liquid carrier, and a method for protecting a geotropic propagule and plant derived therefrom from a phytophagous insect pest, the method comprising coating the propagule with an insecticidally effective amount of the aforedescribed liquid composition and then evaporating the volatile aqueous liquid carrier.