Imazethapyr Herbicide Mixtures for Post-Emergent Resistant Weed Control

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Solution Overview

Problem

Existing herbicides like imazethapyr face challenges in achieving effective post-emergent weed control, particularly for Commelinids, with a need for improved activity, spectrum, application rates, compatibility with crops, and reliable weed control.

Innovation Solution

A composition comprising herbicide A (e.g., ethyl 2-[2-[[3-chloro-5-fluoro-6-[3-methyl-2,6-dioxo-4-(trifluoromethyl)pyrimidin-1-yl]-2-pyridyl]oxy]phenoxy]acetate or its salts, imazethapyr, and optionally herbicide C (e.g., saflufenacil, trifludimoxazin, glyphosate, glufosinate, 2,4-D, pyroxasulfone) is applied post-emergently, exhibiting a synergistic herbicidal effect beyond additive activity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a single herbicide is used for post-emergent weed control, then the application is simple, but the herbicidal activity and spectrum of activity are insufficient

Engineering Contradiction:
Improveapplication simplicityVSAvoidherbicidal activity
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The patent combines herbicide A with imazethapyr and optionally herbicide C to create a synergistic mixture that achieves superior herbicidal activity and broader spectrum of activity compared to individual herbicides, while maintaining practical application simplicity through a single composition application

Inventive Principle:
Principle #5Merging (Combining)

2Reliability

If herbicide application rates are increased to improve weed control, then weed control effectiveness improves, but compatibility with useful plants deteriorates

Engineering Contradiction:
Improveweed control effectivenessVSAvoidcompatibility with useful plants
Core Design Contradiction:
ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the parameter of herbicide concentration by using a synergistic mixture where herbicide A is combined with imazethapyr and optionally herbicide C. This allows achieving effective weed control at lower total application rates compared to using single herbicides at high rates, thereby maintaining compatibility with useful plants while improving weed control effectiveness

Inventive Principle:
Principle #35Parameter changes

3Reliability

If a broad spectrum of herbicidal activity is achieved using multiple compounds, then weed control coverage improves, but the complexity of the composition increases

Engineering Contradiction:
Improvespectrum of activityVSAvoidcomposition complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges herbicide A with imazethapyr and optionally herbicide C to create a composition that achieves broad spectrum of activity against various weed species including Commelinids. The merging of these specific herbicides provides enhanced and synergistic herbicidal activity across a wide range of weeds while maintaining manageable composition complexity through a defined combination rather than multiple separate applications

Inventive Principle:
Principle #5Merging (Combining)

Data Source

PatentUS12538923B2Herbicidal compositions comprising imazethapyr
Publication Date: 2026.02.03 BASF SE
  • US12538923B2 patent drawing

AI summary

The present invention relates to a method for post-emergent weed control, which comprises applying an effective amount of a composition comprising herbicide A (component A), imazethapyr (component B) and optionally herbicide C (component C) to emerged weeds, or an area, where weeds are growing.