Herbicidal Composition Synergy Cinmethylin Napropamide
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Solution Overview
Problem
Current herbicides often fail to provide effective control of undesirable vegetation, particularly herbicide-resistant weeds, with limited compatibility with crop plants and a narrow spectrum of activity, leading to increased application rates and damage to crops.
Innovation Solution
A herbicidal composition combining (±)-2-exo-(2-Methylbenzyloxy)-1-methyl-4-isopropyl-7-oxabicyclo[2.2.1]heptane with napropamide or napropamide-M, which offers a synergistic effect, enhancing weed control while reducing application rates and minimizing crop damage, and effectively managing herbicide-resistant weed biotypes.
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 narrow and herbicide-resistant weeds cannot be controlled
Solution Approach 1:
The patent combines two different herbicidally active compounds (cinmethylin and napropamide or napropamide-M) in a single composition to achieve synergistic effects. This merging allows the composition to control both grass weeds and broadleaf weeds simultaneously, expanding the spectrum of activity while managing complexity through a defined formulation approach.
2Reliability
If application rate is increased to control resistant weeds, then weed control effectiveness improves, but damage to crop plants increases
Solution Approach 1:
The patent changes the parameter of herbicide formulation by combining two active ingredients in specific ratios (cinmethylin at 0.01-2 kg a.i./ha and napropamide or napropamide-M at 0.05-2 kg a.i./ha). This parameter change creates a synergistic effect that achieves reliable weed control at lower application rates, thereby reducing damage to crop plants compared to using single compounds at higher rates.
3Reliability
If a single herbicidally active compound is used, then the composition is simple, but weed control reliability against resistant biotypes is insufficient
Solution Approach 1:
The patent creates a composite herbicidal material combining cinmethylin and napropamide or napropamide-M. This composite approach leverages the different modes of action of the two compounds to achieve reliable control of herbicide-resistant weed biotypes, including those resistant to ACCase-inhibitors and ALS-inhibitors, while maintaining a manageable composition structure.
4Reliability
If application rate is increased to achieve effective weed control, then control effectiveness improves, but cost and environmental impact increase
Solution Approach 1:
The patent optimizes the parameters of herbicide application by formulating a combination of cinmethylin and napropamide or napropamide-M that produces synergistic effects. This allows achieving effective weed control at reduced application rates (cinmethylin at 0.01-2 kg a.i./ha and napropamide or napropamide-M at 0.05-2 kg a.i./ha), thereby reducing the quantity of substance applied while maintaining or improving control effectiveness.
Data Source
AI summary
The present invention relates to a herbicidal composition comprising napropamide or napropamide-M. The invention also relates to methods and uses for controlling undesirable vegetation, in particular in crops.