Selective Herbicidal Compounds for Low-Toxicity Weed Control
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Solution Overview
Problem
Existing herbicides face challenges with timing issues, toxicity, and non-selectivity, leading to ineffective weed control that harms desired plants and the environment.
Innovation Solution
Development of novel pesticidal and herbicidal compounds represented by specific chemical structures (Formula I, II(a)-II(d) and III(a)-III(c)) that are applied in agrochemical compositions, offering selective weed control without harming desired plants or the environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pre-emergent herbicides are applied to prevent weed seed germination, then weed control effectiveness is improved, but timing precision and reliability deteriorate because the herbicide may degrade before weed seeds germinate
Solution Approach 1:
The patent applies preliminary action by formulating herbicides with stabilizing agents and controlled-release mechanisms that maintain herbicide activity from application through the expected germination period. The composition includes adjuvants and protective compounds that prevent premature degradation, ensuring the herbicide remains effective until weed seeds germinate and are exposed to the active ingredient.
2Adaptability or versatility
If post-emergent herbicides are applied after weed seeds germinate to kill active weeds, then timing flexibility is improved, but selectivity deteriorates because non-selective herbicides kill desirable plants along with weeds
Solution Approach 1:
The patent applies local quality by developing herbicide compositions with differential uptake or translocation properties that exploit physiological differences between weed and crop plants. The formulation includes selective carriers or surfactants that enhance penetration into weed tissues while being repelled or metabolized differently by desirable plants, achieving selective control at the site of application.
Solution Approach 2:
The patent applies parameter changes by modifying physical or chemical parameters of the herbicide composition, such as particle size, solubility, or volatility, to create conditions where the herbicide preferentially affects weeds. The formulation may include compounds that change state or reactivity based on environmental parameters like pH or temperature, which differ between weed and crop environments.
3Productivity
If conventional herbicides are applied to achieve weed control, then weed elimination is improved, but environmental safety and human toxicity worsen due to high residual concentrations in soil and water
Solution Approach 1:
The patent applies discarding and recovering by designing herbicide molecules that rapidly degrade into harmless byproducts after fulfilling their weed-killing function. The formulation includes biodegradable components and enzymatic breakdown agents that accelerate the conversion of active herbicide ingredients into non-toxic metabolites, effectively recovering the environment from potential contamination while maintaining weed control efficacy during the active period.
Solution Approach 2:
The patent applies blessing in disguise by converting the potential harm of persistent herbicide residues into a benefit through controlled degradation pathways. The formulation includes compounds that break down into beneficial substances or neutral materials that improve soil health or water quality, transforming the harmful persistence issue into an environmental advantage.
Data Source
AI summary
The present invention relates to novel a pesticidally and/or herbicidally active compounds, agrochemical composition thereof, methods of preparation thereof, and uses thereof for controlling the growth of undesirable plants (e.g., weeds), for example in crop fields.