Pyraclostrobin, thiamethoxam and prochloraz compound suspended seed coating agent and preparation method thereof

Abstract

The invention provides a pyraclostrobin, thiamethoxam and prochloraz compound suspended seed coating agent and a preparation method thereof and relates to the technical field of rice crop insecticidal sterilizing compositions.The pyraclostrobin, thiamethoxam and prochloraz compound suspended seed coating agent is prepared from 4 parts of pyraclostrobin, 25 parts of thiamethoxam, 6 parts of prochloraz, 3 parts of fatty alcohol-polyoxyethylene ether, 5 parts of styrylphenol polyoxyethylene ether, 0.5 part of xanthan gum, 0.5 part of sodium benzoate, 0.5 part of a defoaming agent and the balance deionized water which supplements the components into 100 parts at a minimum.Raw materials are pumped into a preparing kettle to be mixed and stirred, then subjected to preliminary grinding with a colloid mill and then subjected to fine grinding with a sand mill, sampling and analyzing are conducted, and the mixture is filtered, metered, packaged and stored in a warehouse after verified to be qualified.The compound suspended seed coating agent obtained by mixing the pyraclostrobin with the concentration being 35%, the thiamethoxam and the prochloraz with the ratio being 4: 25: 6 can achieve an obvious synergistic effect, and other mixed preparations of other ratios cannot achieve the obvious synergistic effect.

Description

technical field [0001] The invention relates to the technical field of insecticidal and fungicidal compositions for rice crops, in particular to a compound suspension seed coating agent of pyraclostrobin, thiamethoxam and prochloraz and a preparation method thereof. Background technique [0002] At present, the existing insecticidal and fungicidal compositions for the control of rice bakanae disease and thrips, for example, the Chinese patent "CN105052983A" discloses a "pesticide composition", wherein the active ingredients are composed of thiamethoxam and pyraclofenac The mass ratio of the thiamethoxam to the pyraclostrobin is (1-10):1. Another Chinese patent "CN104488950A" discloses a "suspension seed coating agent containing pyraclostrobin, shenazamycin and thiamethoxam", wherein the active ingredients are pyraclostrobin, shenazamycin and clothianidin The mass ratio of oxazine is 1-80:80-1:1-80. [0003] The inventor has verified through long-term experiments that the a...

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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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