A kind of dimethomorph and thiram fungicide and its preparation method and application
A technology of use and oil preparation, applied in the field of preparation of ultra-low volume spray oil, can solve the problems of reducing the use of pesticides, covering a large area, and using a large amount, so as to reduce the use of pesticides, cover a large area, and reduce the use of pesticides. amount of effect
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Embodiment 1
[0027] Example 1: 1% dimethomorph · thiram ultra-low volume spray oil
[0028]
[0029] Preparation method: under normal temperature and pressure, weigh the original drug of the formulated amount, and add a certain amount of solvent to it to completely dissolve it, then add the anionic surfactant and nonionic surfactant of the formulated amount, stir Uniform, then add oily solvent and filler in turn, stir for 10-20 minutes, and finally obtain a single transparent homogeneous light yellow 1% dimethomorph ultra-low volume spray oil.
Embodiment 2
[0030] Example 2: 1% dimethomorph · thiram ultra-low volume spray oil
[0031]
[0032] The preparation method is the same as in Example 1.
Embodiment 3
[0033] Example 3: 2% dimethomorph · thiram ultra-low volume spray oil
[0034]
[0035] The preparation method is the same as in Example 1.
[0036] The prepared ultra-low-capacity spray oils containing dimethomorph and thiram are all light yellow single-phase transparent homogeneous liquids, and there is no stratification and no precipitation at cold storage at -5°C. In addition, the field test found that the prepared agent had good control effect on litchi downy mildew and had no obvious phytotoxicity. The study of its physical and chemical properties shows that the drug has good solubility, stable dosage form and strong evaporation resistance. The measured properties are shown in Table 1.
[0037] Table 1: Part of the physical and chemical properties measured in Examples 1-3
[0038]
[0039] Examples of bioassays
[0040] The 1% dimethomorph · thiram ultra-low volume spray oil prepared in Example 1 was subjected to indoor activity test and field drug efficacy tes...
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