Selective Turf Herbicides That Control Weeds and Preserve Green Density
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Solution Overview
Problem
Existing herbicides for lawn and turf weed control often lack selectivity, leading to substantial injury to turfgrass and inadequate weed control, particularly during dry seasons, and do not enhance turfgrass quality.
Innovation Solution
The use of substituted isoxazoline carboxamides as herbicides that provide selective weed control without harming turfgrass, enhancing green color and density.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional herbicides are used for weed control, then weed control effectiveness is improved, but turfgrass damage increases
Solution Approach 1:
The patent modifies the chemical structure of isoxazoline carboxamide herbicides by introducing specific substituents (G = OR4 or NR7R8, where R4, R7, R8 are defined in the formula) to change the chemical parameters of the molecule. This structural modification alters the herbicide's selectivity profile, enabling it to differentiate between weed and turfgrass physiological processes, thus achieving effective weed control while reducing turfgrass damage.
2Reliability
If existing herbicides are applied, then weed control is achieved, but green color enhancement and density improvement of turfgrass are not sufficient
Solution Approach 1:
The modified isoxazoline carboxamide compounds perform multiple functions simultaneously: (1) selective herbicidal activity against weeds, (2) enhancement of turfgrass green color through chlorophyll promotion, and (3) improvement of turfgrass density by stimulating root and shoot growth. This multi-functionality is achieved through the specific molecular structure that can interact with multiple biological pathways in different plant species.
3Adaptability or versatility
If herbicides with broad spectrum activity are used, then wide range of weeds are controlled, but selectivity against turfgrass is lost
Solution Approach 1:
The herbicide exhibits local quality in its biological activity: the same compound at the same concentration shows different effects on different plant species. The modified isoxazoline carboxamide structure interacts with specific enzymatic targets in C3 and C4 weed species while being metabolized or protected by turfgrass through species-specific physiological mechanisms, achieving both broad spectrum control and high selectivity.
4Reliability
If turfgrass is treated during dry season or dormancy, then turfgrass survival is maintained, but green color and quality deteriorate
Solution Approach 1:
The herbicide is applied during dry season or dormancy periods as a preliminary treatment before the stress conditions fully set in. This timing allows the compound to be taken up by the turfgrass and initiate protective physiological responses, such as enhanced chlorophyll synthesis and stress tolerance mechanisms, before the environmental stress causes quality deterioration, thus maintaining both survival and green color.
Data Source
AI summary
The invention relates to the use of one or more compounds of the formula (I) or salts thereof,whereinthe groups R1 to R8 are defined as set forth in claim 1, optionally in the presence of additional agrochemical active ingredients, for improving quality of turf or lawn.