Pyraclostrobin, fipronil and thiophanate-methyl compounded suspension seed coating agent and preparation method thereof

Abstract

The invention provides a pyraclostrobin, fipronil and thiophanate-methyl compounded suspension seed coating agent and a preparation method thereof and relates to the technical field of insecticidal and sterilizing composition for corn crops. 1 L of the pyraclostrobin, fipronil and thiophanate-methyl compounded suspension seed coating agent is at least prepared from 25 g of pyraclostrobin, 250 g of fipronil, 225 g of thiophanate-methyl, 30 g of fatty alcohol-polyoxyethylene ether, 50 g of styrylphenol polyoxyethylene ether, 5 g of xanthan gum, 5 g of sodium benzoate, 5 g of antifoaming agent and the balance of deionized water. The raw materials are pumped into a preparation kettle, mixed and stirred, ground preliminarily by a colloid mill and then finely ground by a sand mill, sampling analysis is performed, and filtering, metering, packaging and put in storage are performed after a sample is qualified. The pyraclostrobin, fipronil and thiophanate-methyl compounded suspension seed coating agent having the concentration of 500 g/L and compounded in the mixing ratio of pyraclostrobin to fipronil to thiophanate-methyl being 25:250:225 can have an obvious synergy effect, while preparations prepared in other mixing ratios cannot have the obvious synergy effect.

Description

technical field [0001] The invention relates to the technical field of insecticidal and fungicidal compositions for corn crops, in particular to a compound suspension seed coating agent composed of pyraclostrobin, fipronil and thiophanate-methyl and a preparation method thereof. Background technique [0002] At present, the existing insecticidal and fungicidal compositions for the prevention and treatment of corn stalk rot and cutworms, for example, the Chinese patent "CN104542686A" discloses a "compound insecticidal and fungicidal composition", wherein the active ingredient is pyrazole ether esters, thiamethoxam, and fipronil. Another Chinese patent "CN 104904739A" discloses a "new suspension seed coating agent", which contains the following ingredients and content, 5% to 30% of thiamethoxam, 5% to 30% of fipronil, and 0.5% of pyraclostrobin %~20%. [0003] The inventor has verified through long-term experiments that the above-mentioned several insecticidal and bactericid...

AI Technical Summary

Problems solved by technology

For example, the prepared suspending agent is easy to cause the product to stick, not easy to disperse and suspend in water, or block the nozzle, and precipitate in the sprayer, etc., resulting in uneven spraying and local phytotoxicity of the crops. The main reason is that the additives There are different defects in the selection of fillers

[0006] 3) Compounding problem, through the toxicity test, heat storage stability test and co-toxicity coefficient determination of several specific proportions disclosed by the above-mentioned several insecticidal and bactericidal compositions, it was found that no obvious synergistic effect could be achieved

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