Herbicidal Composition Synergy Cinmethylin Metazachlor
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Solution Overview
Problem
Current herbicides often fail to provide effective control of undesirable vegetation while being compatible with crop plants, and they struggle to manage herbicide-resistant weed biotypes, leading to reduced efficacy over time.
Innovation Solution
A herbicidal composition comprising (±)-2-exo-(2-Methylbenzyloxy)-1-methyl-4-isopropyl-7-oxabicyclo[2.2.1]heptane and metazachlor, which offers a synergistic herbicidal effect, allowing for reduced application rates and improved compatibility with crops, while effectively controlling both susceptible and resistant weed species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single herbicidally active compound is used, then the application is simple, but the spectrum of activity is limited and resistance develops quickly
Solution Approach 1:
The patent combines two herbicidally active compounds with different modes of action (cinmethylin and metazachlor) into a single composition. This merging approach broadens the spectrum of activity to control both grass and broadleaf weeds simultaneously while delaying resistance development through multiple targets
Solution Approach 2:
The composition achieves multi-functionality by controlling multiple weed types (grasses and broadleaves) and providing both preventive and curative effects. The combination allows a single application to address diverse weed spectra that would require multiple separate treatments
2Reliability
If higher application rates are used to control resistant weeds, then weed control efficacy improves, but crop damage increases
Solution Approach 1:
The patent changes the chemical composition parameters by combining two herbicides with different modes of action in specific ratios. This parameter change allows effective control of resistant weeds at lower application rates because the compounds work synergistically, reducing crop damage while maintaining reliability
Solution Approach 2:
The invention uses a composite herbicidal material combining cinmethylin and metazachlor. This composite approach provides enhanced efficacy against resistant biotypes through multiple modes of action, allowing lower doses to achieve the same control level, thereby reducing phytotoxicity to crops
3Reliability
If repeated herbicide use is applied to control weeds, then weed control is maintained, but resistant biotypes develop and spread
Solution Approach 1:
The patent segments the herbicidal action into two distinct modes of action (cinmethylin and metazachlor) that target different biological pathways. This segmentation prevents resistance development by requiring multiple independent resistance mechanisms to simultaneously develop, maintaining control consistency over time
Solution Approach 2:
The combination acts as an intermediary system where each herbicide compensates for potential resistance in the other. The dual-mode-of-action system serves as a mediator that delays resistance evolution, allowing sustained weed control reliability across repeated applications
Data Source
AI summary
The present invention relates to a herbicidal composition comprising metazachlor. The invention also relates to methods and uses for controlling undesirable vegetation, in particular in crops.