Glufosinate and PPO Inhibitor Herbicide Combinations
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Solution Overview
Problem
Current herbicide combinations for controlling harmful plants or unwanted vegetation often lack sufficient herbicidal activity, have limited broad-spectrum effectiveness, and can cause damage to young plantation crops, leading to reduced harvest yields and inadequate long-lasting herbicidal action.
Innovation Solution
A specific combination of glufosinate, particularly its L-isomer, with protoporphyrinogen-IX oxidase inhibitors like Acifluorfen, Fomesafen, or Lactofen, in specific weight ratios, where the glufosinate component is present in higher amounts compared to the PPO-inhibitor, enhancing herbicidal activity and reducing the required application rates of the PPO-inhibitor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current herbicide combinations are used, then herbicidal activity is provided, but the herbicidal activity is insufficient and spectrum effectiveness is limited
Solution Approach 1:
The patent combines glufosinate (a glutamine synthetase inhibitor) with PPO inhibitors (acifluorfen, fomesafen, or lactofen) to create a synergistic herbicide mixture. This merging of two different herbicide modes of action broadens the spectrum of weed control while maintaining high herbicidal activity, resolving the contradiction between sufficient herbicidal activity and spectrum effectiveness.
Solution Approach 2:
The invention creates a composite herbicide formulation with specific weight ratios (glufosinate at 50-95% and PPO inhibitor at 5-50%) that leverages the complementary properties of each component. The composite formulation achieves both high reliability in herbicidal activity and broad adaptability across different weed species.
2Reliability
If higher application rates are used to improve herbicidal activity, then initial activity increases, but damage to young plantation crops increases and harvest yields reduce
Solution Approach 1:
The patent changes the concentration parameters by using specific weight ratios of glufosinate to PPO inhibitor (50:50 to 95:5), allowing effective herbicidal activity at lower total application rates. This parameter optimization reduces the harmful effects on young plantation crops while maintaining high herbicidal reliability.
Solution Approach 2:
The PPO inhibitor acts as an intermediary that enhances the overall herbicidal effect of the combination, allowing lower doses of each individual herbicide to achieve the desired effect. This intermediary role of the PPO inhibitor with glufosinate reduces crop damage while maintaining high herbicidal activity.
3Adaptability or versatility
If standard herbicide combinations are used, then broad-spectrum control is attempted, but long-lasting herbicidal action is inadequate
Solution Approach 1:
The patent creates a continuous herbicidal action through the synergistic combination of glufosinate and PPO inhibitors, where the two modes of action work together to provide prolonged weed control. The specific formulation ratios ensure that the herbicidal effect continues effectively over an extended period, addressing the inadequate duration of action.
4Reliability
If higher application rates of PPO-inhibitor are used to improve effectiveness, then herbicidal activity increases, but the cost and environmental impact increase
Solution Approach 1:
The patent applies partial action by using reduced amounts of PPO-inhibitor (5-50% of the formulation) in combination with glufosinate. This partial use of the PPO-inhibitor, rather than relying on high doses alone, achieves effective herbicidal control while reducing substance loss and environmental impact.
Solution Approach 2:
Glufosinate serves as an intermediary that enhances the effectiveness of lower PPO-inhibitor doses. The combination allows the PPO-inhibitor to work more efficiently at reduced concentrations, decreasing the loss of substance while maintaining high herbicidal effectiveness.
Data Source
AI summary
The present invention relates to specific herbicide combinations comprising (i) L-glufosinate and/or salts thereof and (ii) a PPO-inhibitor selected from Acifluorfen, Fomesafen or Lactofen in specific ratios, and to compositions comprising said herbicide combinations in these ratios. The present invention further relates to a method of producing said specific herbicide combinations and compositions comprising said specific herbicide combinations. The present invention also relates to the use of said specific herbicide combinations and compositions comprising said specific herbicide combinations in the field of agriculture, for controlling harmful plants or undesired plant growth, as well as to corresponding methods.