Glufosinate and Pyroxasulfone Herbicidal Composition for Broadleaf Weed Control
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Solution Overview
Problem
Current herbicidal compositions for preplant burndown, particularly those using glyphosate or glufosinate, often yield unsatisfactory weed control, especially against difficult-to-control broadleaf species and rhizomatous grasses, requiring high dosages and being weather-dependent, with limited persistence and potential toxicity to mammals.
Innovation Solution
A herbicidal composition combining glyphosate or glufosinate with pyroxasulfone and additional herbicides from specific inhibitor groups (ALS, PPO, auxins, HPPD, PSII, etc.) to enhance weed control efficacy, persistence, and safety, allowing for flexible application and reduced toxicity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If glyphosate or glufosinate is applied solo for burndown, then application simplicity is maintained, but weed control effectiveness deteriorates (unsatisfactory control of broadleaf species and rhizomatous grasses)
Solution Approach 1:
The patent combines glyphosate or glufosinate with pyroxasulfone and additional herbicides from specific inhibitor groups (ALS, PPO, auxins, HPPD, PSII) 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 difficult-to-control species while maintaining practical application feasibility
2Reliability
If high dosage rates of glyphosate or glufosinate are applied to improve weed control, then weed control effectiveness improves, but toxicity to mammals increases
Solution Approach 1:
The patent changes the chemical composition parameters by introducing pyroxasulfone and other herbicides with different modes of action. This parameter change allows achieving effective weed control at lower overall dosage rates, thereby reducing mammalian toxicity while maintaining or improving weed control effectiveness through synergistic interactions among the herbicide components
3Duration of action of stationary object
If conventional herbicide combinations are applied to improve weed control persistence, then persistence is extended, but reliability under varying weather conditions deteriorates (weather-dependent effectiveness)
Solution Approach 1:
The patent creates a composite herbicidal formulation containing glyphosate or glufosinate combined with pyroxasulfone and additional herbicides from multiple inhibitor groups. This composite material approach provides consistent herbicidal activity persistence across varying weather conditions by leveraging the complementary properties and different modes of action of the constituent herbicides
4Reliability
If multiple herbicides are combined to improve weed control spectrum, then weed control effectiveness improves, but composition complexity increases
Solution Approach 1:
The patent designs a multi-functional herbicidal composition where pyroxasulfone and additional herbicides from specific inhibitor groups serve multiple purposes: they provide pre-emergence and post-emergence activity, target different weed species (broadleaf and grass), and offer complementary modes of action. This multi-functionality approach broadens the weed control spectrum while managing composition complexity through strategic selection of synergistic partners
Data Source
AI summary
The present invention relates to a herbicidal composition which comprises:a) at least one herbicide A selected from glyphosate, glufosinate and their salts, andb) a herbicide B which is 3-[5-(difluoromethoxy)-1-methyl-3-(trifluoromethyl)pyrazol-4-ylmethylsulfonyl]-4,5-dihydro-5,5-dimethyl-1,2-oxazole [common name: pyroxasulfone].The present invention relates in particular to a herbicidal composition comprising:a) at least one herbicide A selected from glyphosate, glufosinate and their salts,b) a herbicide B which is 3-[5-(difluoromethoxy)-1-methyl-3-(trifluoromethyl)pyrazol-4-ylmethylsulfonyl]-4,5-dihydro-5,5-dimethyl-1,2-oxazole [common name: pyroxasulfone], andc) at least one further herbicide C, which is selected from the herbicide groups C.1 to C.8:C.1 herbicides of the group of acetolactate synthase inhibitors (ALS inhibitors),C.2 herbicides of the group of protoporphyrinogen oxidase inhibitors (PPO inhibitors),C.3 herbicides of the group of auxines,C.4 herbicides of the group of 4-hydroxyphenyl-pyruvate-dioxygenase inhibitors (HPPD inhibitors),C.5 herbicides of the group of phytoene desaturase inhibitors (PDS inhibitors),C.6 herbicides of the group of photosystem II inhibitors (PSII inhibitors),C.7 herbicides of the group of microtubulin inhibitors, andC.8 herbicides of the group of inhibitors of the synthesis of very long chain fatty acids (VLCFA inhibitors).