Herbicidal Combination Synergy for Weed Control

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Solution Overview

Problem

Current herbicide combinations are inadequate for controlling resistant and persistent weeds, often resulting in additive or antagonistic effects, phytotoxicity to crops, and the development of herbicide-resistant weeds, necessitating a synergistic combination that enhances weed control while minimizing environmental impact and crop damage.

Innovation Solution

A synergistic combination of saflufenacil, a PPO inhibitor, with at least one triazine, triazinone, triazole, or triazolopyrimidine herbicide, and a dinitroaniline herbicide, applied together to achieve enhanced weed control with reduced dosages and improved residual effects.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If current herbicide combinations are used, then broader spectrum of control is achieved, but resistance management is insufficient and phytotoxicity occurs

Engineering Contradiction:

Improvebroader spectrum of controlVSAvoidresistance management

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The patent combines three herbicides with different modes of action (PPO inhibitor, microtubule inhibitor, and photosynthetic inhibitor) into a single composition. This merging of multiple mechanisms of action achieves broader spectrum weed control while managing resistance through multi-target inhibition, preventing weeds from developing resistance to any single herbicide.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The invention creates a composite herbicide formulation containing saflufenacil, pendimethalin, and metribuzin in specific ratios. This composite material leverages the synergistic effects of different herbicide classes to achieve enhanced control efficacy and resistance management that cannot be accomplished with individual herbicides.

Inventive Principle:

Principle #40Composite materials

2Adaptability or versatility

If herbicide combinations are used, then weed control spectrum is expanded, but phytotoxicity to crops increases

Engineering Contradiction:

Improveweed control spectrumVSAvoidphytotoxicity to crops

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent optimizes the concentration parameters of each herbicide component within specific ranges (saflufenacil: 0.1-10 g ai/ha, pendimethalin: 500-2000 g ai/ha, metribuzin: 500-2000 g ai/ha). By carefully controlling these parameters, the formulation achieves broad weed control while maintaining crop safety through reduced phytotoxicity.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If higher dosages of herbicides are used, then weed control efficacy is improved, but environmental damage increases

Engineering Contradiction:

Improveweed control efficacyVSAvoidenvironmental damage

Core Design Contradiction:

ReliabilityVSLoss of substance

Solution Approach 1:

The patent converts the potential harm of high herbicide dosages into a benefit by utilizing synergistic interactions between the three herbicides. The combined effect of saflufenacil, pendimethalin, and metribuzin allows achieving superior weed control efficacy at lower individual dosages of each component, thereby reducing environmental contamination and non-target effects.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The combination demonstrates synergistic control of weeds, providing broader spectrum activity, improved yield, and plant health, while minimizing phytotoxicity and resistance development, with effective pre- and post-emergent weed control and residual effects.

Implementation Method 1

PPO inhibitor herbicides are mostly used to injure broadleaf plants... Saflufenacil is PPO inhibitor herbicide

Methodology Applied

Scientific EffectPPO inhibition:

Implementation Method 2

Microtubule Inhibitors are generally applied to control annual grasses... Pendimethalin is a microtubule inhibitor herbicide

Methodology Applied

Scientific EffectMicrotubule inhibition:

Implementation Method 3

Photosynthetic Inhibitors control many broadleaf and some grass weeds by interfering in the electron transport chain and indirectly membrane leakage and cell damage

Methodology Applied

Scientific EffectPhotosynthetic inhibition:

Data Source

PatentUS11419336B2Herbicidal combination

Publication Date: 2022.08.23 UPL LTD

AI summary

The present invention provides a herbicidal combination comprising Saflufencacil in combination at least two herbicides. The first herbicide may be selected from a triazine herbicide, triazinone herbicide, triazole herbicide, triazolone herbicide, or triazolopyrimidine herbicide, and the second herbicide may be at least one dinitroaniline herbicide.