Sulfentrazone Herbicide Control for Wildling Conifers
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Solution Overview
Problem
Current methods for controlling naturally seeded coniferous plants, particularly wildling pines, are inefficient due to high application rates and inconsistent results with existing herbicides like glyphosate, and fail to effectively release genetically improved seedlings without damage.
Innovation Solution
A herbicidally active composition comprising sulfentrazone, carfentrazone, or their agriculturally acceptable salts and derivatives, combined with other herbicides such as ALS inhibitors, photosynthesis inhibitors, or auxin herbicides, is applied to coniferous plants to achieve effective control of wildling conifers with minimal damage to newly planted seedlings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If glyphosate or fosamine is used for wildling conifer control, then control is achieved, but high application rates are required and consistency is poor
Solution Approach 1:
The patent changes the chemical parameter by introducing sulfentrazone and carfentrazone herbicides with different modes of action and chemical properties compared to conventional herbicides like glyphosate. These compounds achieve effective wildling conifer control at lower application rates while providing more consistent results across different conditions.
Solution Approach 2:
The patent employs composite herbicide formulations combining sulfentrazone or carfentrazone with other herbicides having complementary modes of action. This composite approach enhances control reliability and allows for reduced application rates while maintaining effective weed suppression.
2Reliability
If conventional herbicides are applied to control wildlings, then some control is achieved, but newly planted conifer seedlings suffer damage
Solution Approach 1:
The patent applies the local quality principle by utilizing the differential absorption and translocation characteristics of sulfentrazone and carfentrazone. These herbicides are selectively taken up by broadleaf weed foliage and translocated to roots, while conifer seedlings with different physiological characteristics show reduced sensitivity, enabling selective control without damaging planted stock.
Solution Approach 2:
The patent changes the chemical parameter by using herbicides with specific physiological modes of action that exploit metabolic differences between broadleaf weeds and conifers. This enables selective control where wildlings are effectively killed while newly planted conifer seedlings remain largely unharmed.
3Reliability
If fire or mechanical site preparation is used, then wildling control is achieved, but government restrictions and reduced effectiveness limit their use
Solution Approach 1:
The patent replaces mechanical and thermal control methods (fire, mechanical site preparation) with chemical herbicide control using sulfentrazone and carfentrazone. This substitution provides a versatile alternative that is not subject to the same governmental restrictions and can be applied in a wider range of environmental conditions and site types.
Data Source
AI summary
The present invention relates to a method for controlling coniferous plants, in particular naturally seeded coniferous plants (wildling conifers), wherein an effective amount of at least one herbicide selected from the group consisting of sulfentrazone, carfentrazone, their agriculturally acceptable salts and their agriculturally acceptable derivatives is applied to the coniferous plants to be controlled or to their parts, such as roots, leaves, seeds or germinants.