Three-Herbicide Mixture for Broad Weed Control and Lower Dosage

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Solution Overview

Problem

Existing herbicides often fail to effectively control a wide range of weeds due to varying chemical properties, plant species, growth stages, and environmental conditions, necessitating the use of multiple herbicides with unpredictable activity and selectivity.

Innovation Solution

A herbicide mixture comprising pyroxasulfone, chlorotoluron, and mesosulfuron-methyl, in specific weight ratios, applied either individually or in combination, to enhance weed control spectrum and reduce dosage, potentially achieving synergistic effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple herbicides are mixed to control a wider range of weeds, then the weed control spectrum is expanded, but the activity and selectivity of the mixture become difficult to predict

Engineering Contradiction:

Improveweed control spectrumVSAvoidactivity predictability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent combines three specific herbicides (pyroxasulfone, chlorotoluron, and mesosulfuron-methyl) in defined weight ratios to create a mixture that expands weed control spectrum while maintaining predictable activity through systematic formulation

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent specifies precise weight ratio parameters for the herbicide components (pyroxasulfone: 1-80, chlorotoluron: 12-1000, mesosulfuron-methyl: 1) to optimize both the broadening of weed control spectrum and the predictability of mixture activity

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If multiple herbicides are applied to control different weed types, then the weed lineage coverage increases, but the application rate and complexity increase

Engineering Contradiction:

Improveweed lineage coverageVSAvoidapplication rate

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent merges multiple herbicides with different modes of action into a single application formulation, achieving broad weed lineage coverage (gramineous and broad-leaved weeds) while simplifying application to one treatment rather than multiple separate applications

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The herbicide mixture serves multiple functions simultaneously: it controls both gramineous and broad-leaved weeds, provides pre-emergence and early post-emergence activity, and works across different growth stages, reducing the need for multiple specialized applications

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Reliability

If high dosage of single herbicide is used to control weeds, then the herbicidal effect is strong, but crop safety is reduced

Engineering Contradiction:

Improveherbicidal effectVSAvoidcrop safety

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent changes the dosage parameters by distributing the total herbicidal effect across three active ingredients at lower individual dosages (pyroxasulfone: 11.25-180 g ai/ha, chlorotoluron: 140.625-2250 g ai/ha, mesosulfuron-methyl: 1.25-20 g ai/ha), reducing the burden on any single herbicide and improving crop safety

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent creates a composite herbicide formulation combining three chemically distinct active ingredients with different modes of action (ELIS inhibitor, photosynthetic electron transport inhibitor, and ALS inhibitor), where the composite provides both strong herbicidal effect and improved crop safety through reduced individual dosage of each component

Inventive Principle:

Principle #40Composite materials

4Reliability

If repeated herbicide applications are made to control resistant weeds, then the control effectiveness is maintained, but the number of applications and time increase

Engineering Contradiction:

Improvecontrol effectivenessVSAvoidnumber of applications

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The herbicide mixture provides multi-functional activity covering pre-emergence, early post-emergence, and different weed growth stages with a single application, reducing the number of repeated applications needed to maintain control effectiveness

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The patent combines herbicides with different residual activities and modes of action into one formulation, creating a layered control effect that maintains effectiveness over time and delays resistance development, reducing the frequency of re-application

Inventive Principle:

Principle #5Merging (Combining)

Data Source

PatentUS12564194B2Herbicide mixture, herbicidal composition, method and kit for controlling undesired vegetation

Publication Date: 2026.03.03 ADAMA AGAN LTD

AI summary

The present disclosure relates to an herbicide mixture comprising pyroxasulfone, chlorotoluron and mesosulfuron-methyl. The present disclosure also relates to an herbicidal composition comprising pyroxasulfone, chlorotoluron, mesosulfuron-methyl and at least one agricultural carrier. The present disclosure also relates to a method and kit for controlling undesirable vegetation.