Pymetrozine and ethofenprox compound suspending agent and preparation method thereof

Abstract

The invention provides a pymetrozine and ethofenprox compound suspending agent and a preparation method thereof, and relates to the technical field of rice planthopper prevention and control. The pymetrozine and ethofenprox compound suspending agent is at least prepared from 24 parts of pymetrozine, 6 parts of ethofenprox, 3 parts of fatty alcohol-polyoxyethylene ether, 3 parts of styrylphenol polyoxyethylene ether, 0.3 part of xanthan gum, 0.4 part of sodium benzoate, 0.3 part of a defoaming agent and deionized water supplementing to 100 parts. All the raw materials are pumped into a preparation kettle to be mixed and stirred, the mixture is primarily milled by a colloid mill and then finely milled by a sand mill, a sample is sampled to be analyzed, and if the sample is qualified, filtering, metering, packaging and warehousing are conducted. The compounded 30% pymetrozine and ethofenprox compound suspending agent mixed according to the proportion of 4:1 can achieve an obvious synergistic effect range, and all preparations mixed according to other proportions cannot achieve the obvious synergistic effect range.

Description

technical field [0001] The invention relates to the technical field of rice planthopper prevention and control, in particular to a compound suspending agent of pymetrozine and etofenprox and a preparation method thereof. Background technique [0002] At present, the existing insecticidal compositions for controlling rice planthoppers, for example, the Chinese patent "CN 102017949 A" ​​discloses a "synergistic insecticidal composition containing nitenpyram and etofenproxil" and its application ", with nitenpyram and etofenprox as main active ingredients, wherein the weight ratio of nitenpyram and etofenprox is 0.1-80:0.1-60. Another Chinese patent "CN101601391 A" discloses a "composition of nitenpyram and pymetrozine and water dispersible granules thereof", the mass ratio of nitenpyram and pymetrozine in the composition is 10:1 ~1:3. The water-dispersible granule is composed of the following components in weight percent: 5%-50% of pymetrozine, 5%-50% of nitenpyram, 0.5%-30%...

AI Technical Summary

Problems solved by technology

For example, wettable powder is easy to cause product sticking, is not easy to disperse and suspend in water, or clogs the nozzle, and causes precipitation in the sprayer, resulting in uneven spraying

[0006] 3), the problem of compounding, by carrying out toxicity test, heat storage stability test and mixing co-toxicity coefficient measurement on several specific proportions disclosed by the above-mentioned several insecticidal compositions, it is found that no obvious synergistic effect can be achieved

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