Field-used compound herbicide for green onion transplanting and its application method
A compound herbicide and scallion technology, applied in the field of pesticides, can solve the problems of "grass shortage, herbicide crops and environmental safety threats, increase the frequency of application and labor costs, etc., which are difficult to solve in the field of scallions transplanted, so as to improve systemic conduction capacity and Quick-acting, outstanding killing effect, and the effect of reducing labor costs
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Embodiment 1
[0025] The compound herbicide for green onion transplanting field of the present invention is prepared by pendimethalin, oxyflufen, Tween 60, Eucalyptus oil, and ethyl acetate according to the following weight percentages:
[0026] Pendimethalin 33.4%, oxyfluorfen 6.6%, Tween 60 30%, Eucalyptus eucalyptus oil 5%, tar oleogalic acid 5%, glycerin 5%, ethyl acetate 15%.
[0027] Accurately weigh the above raw materials, firstly mix pendimethalin and oxyfluorfen evenly, then add ethyl acetate, Tween 60, Eucalyptus eucalyptus oil, tar oleaginic acid, and glycerol in sequence; Stir while adding raw materials, stop stirring when there is no precipitation, no floating matter, no stratification, let stand for 1-2 hours, bottle, constant volume, seal, label, etc., and store in a cool place.
[0028] The method that the composite herbicide prepared by the present invention is used in the green onion transplanting field is:
[0029] In the first stage, after the scallions are transplante...
Embodiment 2
[0032] The composite herbicide of the present invention has been used in the green onion transplanting field for two years, and the detection results of the residues of pendimethalin and oxyfluorfen in the green onion white and the soil cultivation layer are as follows:
[0033] Gas chromatography was used to detect the residual amount of pendimethalin (mg / kg) in scallions. The results are shown in Table 1 below:
[0034] Table 1
[0035]
[0036] my country and the International Codex Alimentarius Commission have not formulated the maximum residue limit (RML) of pendimethalin in scallions, while the US EPA stipulates that the residue of pendimethalin in potatoes is 0.1 mg / kg, and Japan and South Korea stipulate that pendimethalin residues in potatoes are 0.1 mg / kg. Ling Ling residues in potatoes 0.2mg / kg. As can be seen from Table 1, the residual amount (mg / kg) of pendimethalin in scallion scallions 2-3 weeks after the compound herbicide medication of the present inventio...
Embodiment 3
[0050]The herbicidal effect of the compound herbicide prepared by the present invention in the green onion transplanting field is shown in the following table 5:
[0051] table 5
[0052]
[0053] The control group used the conventional herbicide Gaicao Neng, and the weed density plants / m 2 .
[0054] As can be seen from Table 5, the compound herbicide prepared by the present invention has a herbicidal effect 2 weeks after the application, and the weed reduction rate is about twice as high as that of the conventional drug Gaicao Neng, and the weed control rate is up to 94.9%. significantly.
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