L-Glufosinate and PPO Inhibitor Herbicidal Mixture
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Solution Overview
Problem
Existing herbicidal mixtures using glufosinate often require multiple applications and high dosage rates for effective weed control, with limited persistence and reliability, especially under adverse weather conditions.
Innovation Solution
A herbicidal mixture comprising L-glufosinate or its salt combined with at least one protoporphyrinogen-IX oxidase inhibitor, which shows enhanced activity and persistence compared to glufosinate alone or mixtures with racemic glufosinate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glufosinate is applied alone for weed control, then the herbicidal activity is maintained, but multiple applications and high dosage rates are required for effective control
Solution Approach 1:
The patent combines glufosinate with at least one protoporphyrinogen-IX oxidase inhibitor (such as flumioxazin, fomesafen, or sulfentrazone) to create a synergistic herbicidal mixture. This combination achieves effective weed control at lower individual dosage rates compared to glufosinate alone, as the two active substances work together to enhance herbicidal activity while reducing the quantity of each substance required.
2Reliability
If glufosinate is applied for weed control, then herbicidal activity is achieved, but the persistence is short and weathering conditions affect reliability
Solution Approach 1:
The patent creates a composite herbicidal formulation combining glufosinate with protoporphyrinogen-IX oxidase inhibitors that have different half-lives and modes of action. This composite mixture provides extended persistence and more reliable weed control under varying weathering conditions, as the combination maintains effective concentrations longer than glufosinate alone while compensating for environmental degradation.
3Reliability
If multiple herbicides are combined to improve weed control, then effectiveness increases, but the complexity of the mixture and application timing becomes more difficult to control
Solution Approach 1:
The patent optimizes the concentration ratios and formulation parameters of glufosinate combined with protoporphyrinogen-IX oxidase inhibitors to create a simplified mixture that maintains effectiveness while reducing operational complexity. By carefully selecting and optimizing these parameters, the invention achieves reliable weed control without requiring overly complex application protocols or multiple separate treatments.
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 mixture provides efficient and reliable control of grass and broadleaf weeds over an extended period, allowing for more flexible application timing and reduced risk of weed escape, while maintaining low toxicity to humans and mammals.
Implementation Method 1
mixtures of L-glufosinate or its salt and at least one protoporphyrinogen-IX oxidase inhibitor show a higher activity in burndown programs, in industrial vegetation management and forestry, in vegetable and perennial crops and in turf and lawn, if compared to L-glufosinate alone or to mixtures of racemic glufosinate and at least one protoporphyrinogen-IX oxidase inhibitor
Data Source
AI summary
The present invention relates to herbicidal mixture comprising L-glufosinate or its salt and at least one protoporphyrinogen-IX oxidase inhibitor. The invention furthermore relates to a method for controlling undesirable vegetation in burndown programs, in industrial vegetation management and forestry, in vegetable and perennial crops and in turf and lawn.