Pyrazole compound or salt thereof, agrochemical composition, and herbicide

Pyrazole compounds [A-1], [A-2], and [A-3] or their salts provide sustained weed control and high crop safety in fluctuating water environments, addressing the limitations of conventional herbicides by maintaining efficacy and safety in crop cultivation.

WO2026155124A1PCT designated stage Publication Date: 2026-07-23KUMIAI CHEM IND CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
KUMIAI CHEM IND CO LTD
Filing Date
2026-01-14
Publication Date
2026-07-23

AI Technical Summary

Technical Problem

Conventional herbicides fail to provide sufficient weed control in environments with fluctuating water levels, leading to reduced effectiveness and increased phytotoxicity due to water wash-off, and they do not address the need for long-lasting pesticide effects and high crop safety even at higher doses.

Method used

Development of pyrazole compounds represented by formulas [A-1], [A-2], and [A-3] or their salts, which exhibit remarkable herbicidal activity and high crop safety, even under water fluctuation conditions, formulated into pesticide compositions and herbicides with optional surfactants for enhanced application.

Benefits of technology

The pyrazole compounds maintain effective weed control over a long period and ensure high crop safety, reducing the frequency of applications and minimizing crop damage, even in environments with varying water levels.

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Abstract

The present invention provides a pyrazole compound that has herbicidal activity capable of eliminating various important weeds, which grow in fields, orchards, paddy fields, non-agricultural land, etc., even under conditions of water fluctuations, and that is highly safe for agricultural crops such as rice, and an agrochemical composition and a herbicide that contain the pyrazole compound. Provided are a pyrazole compound represented by any one of formulas [A-1], [A-2], and [A-3] or a salt thereof, or an agrochemical composition and a herbicide that contain the pyrazole compound or salt thereof as an active ingredient.
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