Herbicidal Mixture Stability via Compatibilizer Mediation
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Solution Overview
Problem
The existing herbicidal mixtures containing 2-[(2,4-dichlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinone and cinmethylin face challenges such as chemical, physical, and biological incompatibilities, stability issues, and reduced effectiveness against herbicide-resistant weeds, necessitating improved application profiles and synergistic effects to enhance crop tolerance and flexibility.
Innovation Solution
A herbicide mixture combining 2-[(2,4-dichlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinone with cinmethylin and additional herbicides or safeners, such as acetochlor and mefenpyr-diethyl, to improve stability, application flexibility, and synergistic effects, allowing for reduced application rates and enhanced weed control across various soil conditions and resistant species.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple active ingredients are combined to improve effectiveness, then weed control effectiveness is enhanced, but chemical and physical incompatibility and stability issues occur
Solution Approach 1:
A compatibilizer is introduced as an intermediary substance to mediate between incompatible herbicide active ingredients. The compatibilizer prevents chemical reactions and physical incompatibility between the active ingredients, allowing them to coexist stably in the same formulation while maintaining their individual herbicidal activities. This resolves the contradiction by enabling multiple active ingredients to be combined without compromising formulation stability.
Solution Approach 2:
The invention creates a composite herbicidal formulation that integrates multiple active ingredients with different chemical properties (e.g., acid-labile and base-labile herbicides) into a single stable product. The composite formulation uses specialized carriers and compatibilizers to maintain the integrity of each active ingredient while achieving synergistic weed control effects, thus resolving the stability-effectiveness contradiction.
2Object-affected harmful factors
If application rate is reduced to improve environmental friendliness, then ecological impact is reduced, but effectiveness against resistant weeds decreases
Solution Approach 1:
Multiple active ingredients with different modes of action are merged into a single formulation, including herbicides that target different biochemical pathways in weeds. This combination allows the formulation to remain effective against herbicide-resistant weed species while using lower application rates of each individual active ingredient, thereby reducing overall ecological impact while maintaining reliability.
Solution Approach 2:
The invention changes the chemical parameters of the herbicide formulation by incorporating acid-labile and base-labile herbicides that are activated under specific soil conditions. This allows the formulation to maintain high effectiveness against resistant weeds at lower application rates, as the active ingredients are released and activated only when they reach the target site, reducing premature degradation and environmental exposure.
3Adaptability or versatility
If application timing is extended from pre-emergence to post-emergence to improve flexibility, then application flexibility is enhanced, but crop tolerance and weed control reliability may be compromised
Solution Approach 1:
The herbicidal formulation is designed with multi-functional active ingredients that can effectively control weeds at different growth stages (pre-emergence, early post-emergence, and late post-emergence). The formulation includes safeners and tolerance-enhancing components that protect crops throughout the application window, allowing flexible timing decisions without compromising crop tolerance or weed control reliability.
4Loss of time
If sowing depth is reduced to improve emergence speed, then emergence time is reduced, but crop tolerance to herbicides decreases
Solution Approach 1:
Safeners and tolerance-enhancing agents are incorporated into the herbicidal formulation to provide preliminary protection to crop seeds before herbicide activation. This preliminary action allows crops to be sown at shallow depths for faster emergence while still providing adequate protection against herbicide damage, as the safeners are already present in the formulation to mitigate potential harm during the critical emergence period.
Data Source
AI summary
The invention relates to herbicidal mixtures containing i) 2-[(2,4-dichlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinone and ii) cinmethylin, as well as to herbicidal compositions containing said mixtures. The invention further relates to a process for synthesizing said herbicidal mixtures and compositions containing said mixtures. The invention finally relates to the use of said mixtures and compositions in the agricultural field for controlling weeds.