Herbicidal Combination Saflufenacil Glufosinate Synergy
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Solution Overview
Problem
Current herbicidal combinations using glufosinate and saflufenacil for burndown applications are inefficient in controlling broadleaf weeds and have short persistence, requiring high application rates and being sensitive to weather conditions, with limited control over difficult-to-control species.
Innovation Solution
A herbicidal combination comprising saflufenacil, glufosinate, and additional herbicides from specific groups such as triazolopyrimidine, pyrimidinyl(thio) benzoate, synthetic auxins, or oxyacetamide herbicides, applied simultaneously or in succession, to enhance weed control and persistence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If glufosinate is applied alone for burndown, then application rate can be reduced, but weed control effectiveness is insufficient especially against broadleaf weeds and difficult-to-control species
Solution Approach 1:
The patent combines glufosinate with saflufenacil and at least one additional herbicide from specific groups (imidazolinones, sulfonylureas, triazolopyrimidines, or pyrimidinyl(thio)benzoates) to create a multi-component herbicidal composition. This merging of multiple herbicides with different modes of action achieves synergistic effects that improve weed control effectiveness against broadleaf weeds and difficult-to-control species while allowing for optimized application rates of each component.
2Reliability
If multiple herbicides are combined to improve weed control spectrum, then herbicidal effectiveness increases, but persistence of herbicidal activity decreases and weather sensitivity increases
Solution Approach 1:
The patent optimizes the concentration ranges of each herbicide component in the combination. Specifically, it defines precise parameter ranges for glufosinate (0.01-1.0 kg active substance/ha), saflufenacil (0.01-0.1 kg active substance/ha), and the third herbicide (0.01-0.5 kg active substance/ha). By carefully controlling these concentration parameters, the formulation achieves both broad-spectrum weed control and extended persistence of herbicidal activity, while reducing sensitivity to weather conditions.
3Reliability
If high application rates are used to control difficult-to-control weeds, then weed control effectiveness improves, but crop compatibility decreases and toxicity to mammals increases
Solution Approach 1:
The patent introduces saflufenacil as an intermediary herbicide that bridges the gap between glufosinate and the third herbicide component. Saflufenacil provides enhanced control against difficult-to-control broadleaf weeds and grasses through its PPO inhibition mechanism, while its specific concentration range (0.01-0.1 kg active substance/ha) ensures it achieves the desired weed control effectiveness without proportionally increasing mammalian toxicity or crop phytotoxicity compared to using higher rates of single herbicides.
4Reliability
If glufosinate is applied in combination with traditional herbicides, then broadleaf weed control improves, but application flexibility is reduced due to weather sensitivity
Solution Approach 1:
The patent creates a composite herbicidal material that integrates four components with complementary properties: glufosinate (systemic herbicide), saflufenacil (PPO inhibitor), and a third herbicide from specific chemical groups. This composite formulation achieves synergistic broadleaf weed control while the balanced composition reduces overall weather sensitivity, thereby extending the application window and improving application flexibility compared to traditional herbicide combinations.
Data Source
AI summary
The present invention relates to a herbicidal combination which comprises:a) a herbicide A which is 2-chloro-5-[3,6-dihydro-3-methyl-2,6-dioxo-4-(trifluoromethyl)-1-(2H)-pyrimidinyl]-4-fluoro-N-[[methyl-(1-methylethyl)-amino]sulfonyl]benzamide,b) a herbicide B which is glufosinate or one of its salts, andc) at least one herbicide C different from herbicides A and B which is selected fromC.1) herbicides of the group of acetolactate synthase inhibitors which are selected from the group of triazolopyrimidine herbicides, sulfonylamino-carbonyl-triazolinone herbicides and pyrimidinyl(thio) benzoate herbicides,C.2) herbicides of the group of protoporphyrinogen oxidase inhibitors,C.3) herbicides of the group of synthetic auxins,C.4) herbicides of the group of microtubule inhibitors,C.5) herbicides of the group of acetyl-CoA carboxylase inhibitors,C.6) herbicides of the group of photosystem II inhibitors,C.7) herbicides of the group of pigment synthesis inhibitors, andC.8) herbicides of the group of VLCFA inhibitors which are selected from the group of oxyacetamide herbicides and chloroacetamide herbicides.