Herbicidal Composition Reducing Phytotoxicity Without Safeners
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Solution Overview
Problem
Existing herbicidal compositions often require safeners to protect cultivated plants from herbicide damage, but these safeners can be specific and may attenuate the herbicidal action on weeds, limiting their broader spectrum of weed control and increasing phytotoxicity to crops.
Innovation Solution
Formulating herbicidal compositions with a combination of amide herbicides like flufenacet, dimethenamid, or metolachlor, fomesafen or its salt, and saflufenacil, in specific ratios to reduce phytotoxicity and enhance weed control without the need for safeners, allowing for broader weed control with lower harm to cultivated plants.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If safeners are added to protect cultivated plants from herbicide damage, then phytotoxicity to crops is reduced, but the herbicidal action on weeds is attenuated and the spectrum of weed control is limited
Solution Approach 1:
The invention removes safeners from the herbicidal composition entirely, extracting the protective function and replacing it with a specific combination of herbicides (fomesafen, saflufenacil, and amide herbicide) that provide both crop safety and broad-spectrum weed control without the need for safener additives
Solution Approach 2:
The invention uses a composite herbidal formulation combining three different herbicide classes (aniline derivative fomesafen, pyrimidine carboxylic acid saflufenacil, and amide herbicide) in specific ratios to achieve synergistic effects that provide both crop protection and broad weed control spectrum
2Object-affected harmful factors
If a specific safener is used for a specific cultivated plant and herbicide class, then protection against phytotoxicity is achieved, but the versatility and broader spectrum of weed control is limited
Solution Approach 1:
The herbicide combination formulation is designed to be universally applicable across multiple crop types (soybean, corn, cotton, sugarcane, small grains) and provides broad-spectrum control over diverse weed species, making a single formulation suitable for multiple applications without requiring crop-specific or weed-specific customization
Solution Approach 2:
By combining three different herbicide mechanisms of action in one formulation, the composition achieves multi-functionality that addresses both crop safety across different plant types and effective control across diverse weed species, eliminating the need for multiple specialized formulations
3Productivity
If higher concentrations of herbicide are applied to ensure weed control, then herbicidal action is improved, but phytotoxicity to cultivated plants increases
Solution Approach 1:
The invention optimizes the concentration parameters of each herbicide component within specific ranges (fomesafen 0.1-5 lb ai/acre, saflufenacil 0.01-0.5 lb ai/acre, amide herbicide 0.5-5 lb ai/acre) to achieve the threshold effect where broad-spectrum weed control is maximized while phytotoxicity to crops is minimized, eliminating the need for higher concentrations
Data Source
AI summary
Herbicidal compositions containing (a) an amide herbicide selected from flufenacet, dimethenamid or a stereoisomer thereof, acetochlor, or metolachlor or a stereoisomer thereof, (b) fomesafen or an agriculturally acceptable salt thereof, and (c) saflufenacil are disclosed, wherein components (a), (b) and (c) are present in amounts effective to reduce the phytotoxicity of the saflufenacil. Methods of making and using herbicidal compositions containing (a) metolachlor or a stereoisomer thereof, (b) fomesafen or an agriculturally acceptable salt thereof, and (c) saflufenacil are also disclosed.