Glufosinate-Pyraflufen Herbicide Ratios for Broader Weed Control
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Solution Overview
Problem
Existing herbicides face challenges such as insufficient herbicidal activity, narrow spectrum of control, low selectivity and compatibility with plantation crops, weak initial activity, short duration of action, and high application rates, which affect crop yields and weed control efficiency.
Innovation Solution
A combination of glufosinate, particularly L-glufosinate, and pyraflufen-ethyl in specific ratios, where L-glufosinate is present in higher amounts, significantly reducing the required application rate of pyraflufen-ethyl, enhancing herbicidal activity, selectivity, and extending the duration of action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing herbicides are used, then herbicidal activity is achieved, but the spectrum of control is narrow and selectivity is low
Solution Approach 1:
The patent combines glufosinate (a glutamine synthetase inhibitor) and pyraflufen-ethyl (a protoporphyrinogen oxidase inhibitor) into a single herbicide composition. This merging of two different herbicide mechanisms expands the spectrum of weed control while maintaining selectivity through optimized ratio formulation (0.1:1 to 10:1 weight ratio), resolving the contradiction between broader control spectrum and maintained selectivity
2Productivity
If existing herbicides are applied, then weed control is achieved, but the initial activity is weak and duration of action is short
Solution Approach 1:
The combination formulation enables preliminary action by rapidly inhibiting glutamine synthetase (glufosinate) to stop amino acid synthesis immediately, while simultaneously initiating protoporphyrinogen oxidase inhibition (pyraflufen-ethyl) that leads to delayed cell membrane disruption. This dual preliminary action creates both immediate and extended herbicidal effects, improving initial activity while extending duration of action through the coordinated release of two different modes of action
Solution Approach 2:
The patent creates a composite herbicide material combining glufosinate and pyraflufen-ethyl in specific ratios (0.1:1 to 10:1 weight ratio), where the composite exhibits synergistic effects that enhance both initial herbicidal activity and extend duration of action beyond what either component achieves alone
3Reliability
If higher application rates are used, then herbicidal activity is improved, but crop damage increases and selectivity decreases
Solution Approach 1:
The patent optimizes the concentration parameters by formulating glufosinate and pyraflufen-ethyl in specific weight ratios (0.1:1 to 10:1), where pyraflufen-ethyl constitutes 5-95% of the total herbicide mixture. This parameter optimization allows reduced application rates while maintaining or enhancing herbicidal activity and improving selectivity, directly resolving the contradiction between herbicidal effectiveness and crop safety
Data Source
AI summary
The present invention relates to specific herbicide combinations comprising (i) L-glufosinate and/or salts thereof and (ii) pyraflufen-ethyl in specific ratios, and to compositions comprising said herbicide combinations in these ratios. The present invention further relates to a method of producing said specific herbicide combinations and compositions comprising said specific herbicide combinations. The present invention also relates to the use of said specific herbicide combinations and compositions comprising said specific herbicide combinations in the field of agriculture, for controlling harmful plants or undesired plant growth, as well as to corresponding methods.