Fosthiazate aqueous emulsion and preparation method thereof

Abstract

The invention discloses a fosthiazate aqueous emulsion and a preparation method thereof. The fosthiazate aqueous emulsion comprises the following components by weight percent: 1-30% of fosthiazate, 2-40% of solvent and cosolvent, 2-8% of emulsifying agent, 1-5% of wetting agent, 0.5-2% of dispersant, 1-5% of stabilizing agent, 0-5% of antifreezing agent, and the balance of deionized water. The method comprises the following steps of: dissolving fosthiazate into the solvent, and adding the emulsifying agent, the wetting agent, the stabilizing agent and the dispersant to obtain an oil phase; and mixing the antifreezing agent and water to obtain a water phase, and gradually adding the oil phase into the water phase or gradually adding the water phase into the oil phase under a high shear condition, thus obtaining the fosthiazate aqueous emulsion. The fosthiazate aqueous emulsion disclosed by the invention has the characteristics of high efficiency, low toxicity, environmental friendliness, safety to human and livestock, and easiness for degradation.

Description

Technical field [0001] The invention relates to a pesticide preparation and a preparation method thereof, in particular to a phosphazene aqueous emulsion and a preparation method thereof. Background technique [0002] Thiazophos is an organophosphorus nematicide. It is mainly used to control nematodes and aphids. It is an efficient, broad-spectrum and safe nematicide and pesticide for killing underground pests. It can be widely used in vegetables, bananas, fruit trees, medicinal materials, etc. Crops, especially suitable for the production of pollution-free vegetables. Thiazophos is a high-efficiency and low-toxic nematicide with contact killing and systemic conductivity. It can effectively prevent nematodes from invading the plant and kill the nematodes that have invaded the plant. The effective period can reach 2-3 months. Thiazophos has low toxicity, meets agricultural export standards, and has specific effects on root knot nematodes and root rot nematodes. [0003] Since Janu...

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Problems solved by technology

The granule preparation of thiazophosphine is unstable and easy to decompose; the emulsifiable concentrate preparation is mainly prepared with aromatic organic solvents. A large amount of aromatic organic solvents such as toluene, xylene, mixed toluene, etc. not only pollute the environment to a certain extent, but also consume a large amount of petrochemical resources

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