Synergistic Herbicidal Composition for Broad-Spectrum Weed Control
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Solution Overview
Problem
Current herbicides with single active ingredients face issues such as drug resistance, limited weed control spectrum, and environmental pollution, as they often only target either monocotyledonous or dicotyledonous weeds, and are not effective against both emerged and unemerged weeds.
Innovation Solution
A herbicidal composition comprising two active components, A and B, with specific mass ratios and formulations, including emulsifiable concentrates, aqueous emulsions, microemulsions, suspensions, and water-dispersible granules, which synergistically control both annual and perennial weeds without cross-resistance, reducing pesticide usage and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single active ingredient is used in herbicides, then the formulation is simple and cost-effective, but drug resistance develops quickly and the herbicidal spectrum is limited
Solution Approach 1:
The patent combines two different active ingredients ( Component A: 3-(2-chloro-4-fluoro-5-(3-methyl-2,6-dioxo-4-trifluoromethyl-3,6-dihydropyrimidine-1(2H)-yl)phenyl)-5-methyl-4,5-dihydroisoxazole-5-carboxylic acid ethyl ester and Component B: saflufenacil) into a single herbicidal composition. This merging of two distinct herbicidal agents with different modes of action and spectra creates a synergistic effect that broadens weed control coverage and delays resistance development while maintaining formulation practicality
2Reliability
If herbicides are designed to target specific weed types (monocotyledonous or dicotyledonous), then the formulation is specialized and effective against target weeds, but the herbicidal spectrum is limited and cannot control both monocot and dicot weeds
Solution Approach 1:
The herbicidal composition achieves multi-functionality by combining Component A which is effective against dicotyledonous weeds with Component B which provides activity against monocotyledonous weeds. This combination creates a universal herbicide formulation that can control both monocot and dicot weed species, as well as both emerged and unemerged weeds, within a single application
3Ease of operation
If continuous use of the same herbicide is practiced, then the application process is simple and consistent, but weed resistance develops rapidly
Solution Approach 1:
The patent changes the chemical parameter composition by combining two active ingredients with different chemical structures and modes of action (Component A: isoxazole-carboxylic acid derivative and Component B: phenylpyrrole carboxylic acid derivative). This parameter change in the herbicidal composition prevents resistance development because weeds cannot develop cross-resistance to both components simultaneously, while maintaining application consistency through a fixed ratio formulation
4Reliability
If higher doses of single-ingredient herbicides are applied to improve control effect, then the herbicidal efficacy increases, but the cost increases and environmental pollution worsens
Solution Approach 1:
The patent converts the potential harm of using multiple active ingredients (increased formulation complexity) into a benefit by demonstrating synergistic interaction between Component A and Component B. This synergy allows the use of lower total doses of active ingredients while achieving superior weed control effect compared to single-ingredient herbicides, thereby reducing environmental pollution and cost
Data Source
AI summary
Disclosed herein is a herbicidal composition, comprising an active component A and an active component B, wherein the active component B is one selected from the group consisting of glufosinate-ammonium, glufosinate-P-ammonium, oxyfluorfen, acetoflufen, imazethapyr, dimethoxamide, dimethoxamid-P, metolachlor, S-metolachlor, butachlor, acetochlor, pyroxasulfone, glyphosate and derivatives thereof.