Synergistic Herbicidal Composition of Pyridine Carboxylic Acid and Propyzamide
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Solution Overview
Problem
Current herbicides are inadequate in effectively controlling undesirable vegetation in agriculture, necessitating the development of new compositions and methods that offer improved herbicidal activity and synergistic effects.
Innovation Solution
The use of a compound of formula (4-amino-3-chloro-6-(4-chloro-2-fluoro-3-methoxyphenyl)-pyridine-2-carboxylic acid or its agriculturally acceptable salts or esters in combination with propyzamide, which can be applied alone or with adjuvants and carriers to achieve synergistic herbicidal effects, providing control over a wide range of weeds in various crops and non-crop situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If current herbicides are used alone, then application simplicity is maintained, but herbicidal effectiveness is insufficient
Solution Approach 1:
The patent combines compound (I) with propyzamide to create a synergistic herbicidal composition. This merging of two different herbicidal agents with distinct modes of action (HPPD inhibition and ACCase inhibition) produces enhanced weed control effectiveness that exceeds the sum of individual activities, resolving the contradiction between simplicity and effectiveness by creating a unified composition that delivers superior performance.
Solution Approach 2:
The invention employs a composite herbicidal system comprising compound (I) and propyzamide in specific ratios. This composite approach leverages the complementary mechanisms of action between the two compounds, where compound (I) inhibits HPPD and propyzamide inhibits ACCase, creating a multi-target herbicidal strategy that overcomes weed resistance and enhances overall efficacy while maintaining manageable composition complexity.
2Adaptability or versatility
If a single herbicide is applied, then application cost is reduced, but weed control spectrum is limited
Solution Approach 1:
The herbicidal composition achieves multi-functionality by combining compound (I) and propyzamide, enabling control over a broad spectrum of weed types including grasses, broadleaf weeds, and sedges. This universal approach allows a single composition to address diverse weed infestations that would otherwise require multiple different herbicides, expanding the control spectrum without proportionally increasing dosage requirements due to synergistic effects.
3Reliability
If herbicide combinations are used, then herbicidal activity is enhanced, but formulation complexity increases
Solution Approach 1:
The patent optimizes the formulation by establishing specific concentration ranges for compound (I) and propyzamide that maximize synergistic herbicidal activity while maintaining formulation simplicity. By defining precise parameter ranges (0.1-98% w/w for compound (I) and 0.1-98% w/w for propyzamide), the invention achieves enhanced reliability through synergistic interaction without excessive formulation complexity, allowing for practical manufacturing and application.
Data Source
AI summary
Herbicidal compositions and methods of controlling undesirable vegetation using a combination of (a) a compound of formula (I): (structurally represented) or an agriculturally acceptable salt or ester thereof and (b) propyzamide provide control of undesirable vegetation, e.g., in winter/spring oilseed rape, winter/spring canola, vegetables, Brassica spp, ornamentals, rice, wheat, triticale, barley, oats, rye, sorghum, com/maize, sunflower, row crops, pastures, grasslands, rangelands, fallowland, sugarcane, turf, tree and vine orchards, and industrial vegetation management and rights-of-way.