Ternary Herbicide Combinations for Selective Weed Control

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Solution Overview

Problem

Current herbicide combinations often require high application rates to achieve effective weed control, which can reduce selectivity and increase economic and environmental costs, and may face stability and compatibility issues due to the use of multiple active compounds.

Innovation Solution

A combination of sulfonylurea herbicides, specifically ALS inhibiting herbicides like thiencarbazone, pyroxsulam, halauxifen, pinoxaden, and pyroxasulfone, with safeners, which allows for synergistic effects and reduced application rates, improving stability and selectivity while maintaining herbicidal efficacy.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If high application rates of herbicides are used to achieve effective weed control, then herbicidal efficacy is improved, but selectivity is reduced and economic and environmental costs increase

Engineering Contradiction:

Improveherbicidal efficacyVSAvoidselectivity loss and environmental impact

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent combines multiple herbicides with different modes of action (ALS-inhibiting sulfonylurea, PPO-inhibiting aryloxyphenoxypropionate, and glyphosate) into a single formulation. This synergistic combination achieves enhanced weed control efficacy at reduced application rates, thereby maintaining selectivity and reducing environmental impact while improving herbicidal reliability

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If multiple active compounds are combined to improve herbicidal action, then efficacy is enhanced, but stability and compatibility issues arise

Engineering Contradiction:

Improveherbicidal actionVSAvoidformulation stability

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent incorporates specific adjuvants and compatibility agents as intermediaries between the different herbicide compounds. These additives mediate interactions between the ALS-inhibiting sulfonylurea, PPO-inhibiting aryloxyphenoxypropionate, and glyphosate, preventing degradation and incompatibility while maintaining formulation stability and enhanced herbicidal action

Inventive Principle:

Principle #24Intermediary (Mediator)

3Duration of action of stationary object

If application rates are increased to compensate for herbicide breakdown, then duration of action is extended, but selectivity and economic efficiency are reduced

Engineering Contradiction:

Improveherbicide duration of actionVSAvoidselectivity and economic efficiency

Core Design Contradiction:

Duration of action of stationary objectVSObject-affected harmful factors

Solution Approach 1:

The patent combines herbicides with different persistence characteristics and modes of action into a single formulation. This synergistic combination provides extended duration of action through the complementary effects of the ALS-inhibiting sulfonylurea, PPO-inhibiting aryloxyphenoxypropionate, and glyphosate, eliminating the need to increase application rates while maintaining selectivity and economic efficiency

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS11291208B2Ternary herbicide combinations

Publication Date: 2022.04.05 BAYER CROPSCIENCE AG

AI summary

Herbicide combinations comprising an effective amount of components (A), (B) and (C) wherein(A) denotes one or more herbicides selected from the group of compounds of the formula (I) and salts thereof(B) denotes one or more herbicides selected from the group of the compounds of the formula (II) and their salts(C) denotes at least one compound selected from the group consisting of(C-1) thienecarbazone-methyl;(C-2) pyroxsulam;(C-3) halauxifen;(C-4) pinoxaden;(C-5) pyroxasulfone;and/or salts thereof.