Herbicidal Composition Synergy Trinexapac-ethyl HPPD Inhibitors
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Solution Overview
Problem
Current herbicides often require higher application rates and may not effectively control a wide range of weeds, particularly in turfgrass, due to limited synergistic effects when used individually.
Innovation Solution
A herbicidal composition combining trinexapac-ethyl with at least one HPPD inhibiting herbicide, such as mesotrione, which exhibits a synergistic herbicidal effect, controlling weeds by inhibiting internode elongation and carotenoid biosynthesis, respectively, thereby enhancing weed control efficacy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual herbicides are used, then application rates must be increased to achieve effective weed control, but this increases cost and potential crop damage
Solution Approach 1:
The patent combines trinexapac-ethyl (a plant growth regulator) with HPPD-inhibiting herbicides to create a synergistic herbicidal composition. This merging of two different types of compounds produces enhanced weed control efficacy at lower application rates than would be required for either compound alone, directly resolving the contradiction between reliability of weed control and quantity of substance applied.
2Reliability
If higher application rates are used to control resistant weeds, then weed control effectiveness improves, but crop safety and selectivity deteriorate
Solution Approach 1:
The synergistic combination of trinexapac-ethyl with HPPD-inhibiting herbicides provides enhanced weed control effectiveness while maintaining crop safety. The plant growth regulator component selectively affects weed growth without compromising crop tolerance, allowing effective control of resistant weeds at rates that do not cause crop damage.
Solution Approach 2:
The composition exploits differential sensitivity between crops and weeds to the herbicidal mechanism. The HPPD-inhibiting herbicide component selectively targets weed carotenoid biosynthesis while the trinexapac-ethyl component selectively inhibits internode elongation in weeds, creating a locally differentiated effect that spares tolerant crops.
3Adaptability or versatility
If single-mode herbicides are used, then application is simple, but adaptability to control diverse weed species deteriorates
Solution Approach 1:
The patent merges two herbicidal mechanisms of action (plant growth regulation and HPPD inhibition) into a single composition that provides broad-spectrum weed control. This combination approach increases adaptability to control diverse monocotyledonous and dicotyledonous weed species while maintaining manageable composition complexity through synergistic interaction.
Solution Approach 2:
The herbicidal composition achieves multi-functionality by combining compounds that target different physiological pathways. The trinexapac-ethyl component addresses stem elongation control while the HPPD-inhibiting herbicide component addresses carotenoid biosynthesis inhibition, creating a universal solution for controlling diverse weed species with different modes of resistance.
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 of trinexapac-ethyl and HPPD inhibitors demonstrates a synergistic effect, achieving significant weed control at lower application rates, effectively controlling a variety of monocotyledonous and dicotyledonous weeds, including barnyard grass, giant foxtail, and goosegrass, with enhanced selectivity for turfgrass and crops.
Implementation Method 1
Trinexapac-ethyl is a plant growth regulator which reduces stem growth by inhibition of internode elongation
Implementation Method 2
HPPD inhibitors... control weeds by inhibiting internode elongation and carotenoid biosynthesis
Data Source
AI summary
The present invention relates to method of controlling the growth of weeds, in particular barnyard grass, giant foxtail, large crabgrass, fall panicum, goosegrass and/or woolly cupgrass, using a herbicidal composition comprising trinexapac-ethyl and at least one HPPD inhibiting herbicide. It also relates to the use of this composition, particularly on turfgrass.