Dinotefuran micron-emulsion and preparation method thereof

Abstract

The invention relates to the field of pesticide preparations, and provides a dinotefuran micron-emulsion and a preparation method thereof. The dinotefuran micron-emulsion comprises components of, by weight: 1-40% of dinotefuran, 10-30% of a solvent, 10-25% of a surfactant, 5-15% of a co-solvent, and balance of water. The dinotefuran micron-emulsion provided by the invention is advantaged in low cost, simple preparation process, low packaging requirement, reduced organic solvent dosage, low residue, and small pollution on the environment. The controlling effect provided by the dinotefuran micron-emulsion is higher than that of dinotefuran particle preparations. Therefore, the dinotefuran micron-emulsion is suitable to be broadly popularized.

Description

technical field

[0001] The invention relates to the field of pesticide preparations, in particular to a dinotefuran microemulsion and a preparation method thereof. Background technique

[0002] Dinotefuran (dinotefuran), the chemical name is (RS)-1-methyl-2-nitro-3-[(3-tetrahydrofuran)-methyl]guanidine, is the third-generation nicotine developed by Mitsui Chemicals, Japan Insecticides, the chemical structure of which is very different from the existing neonicotinoid insecticides, its tetrahydrofuryl group replaces the previous chloropyridyl and chlorothiazolyl groups, and does not contain halogen elements. At the same time, it is also different from nicotine in terms of performance. It is mainly used to control aphids, leafhoppers, planthoppers, thrips, whiteflies and their resistant strains on wheat, rice, cotton, vegetables, fruit trees, tobacco leaves and other crops. It is highly effective against insects of the order Pteroptera, Lepidoptera, Beetles and Totaloptera, a...

Examples

Embodiment 1

[0022] Embodiment 1: 5% dinotefuran microemulsion

[0023]

[0024] Mix dinotefuran with solvent, surface active agent and co-solvent thoroughly, then add water and stir well to form microemulsion.

Embodiment 2

[0025] Embodiment 2: Physical and chemical performance measurement

[0026] Get the dinotefuran microemulsion prepared in Example 1 and carry out the physical and chemical performance test, the results are as follows:

[0027] Appearance: clear and transparent single-phase liquid;

[0028] Transparent temperature area: minus 5°C to above 60°C;

[0029] Low temperature stability: no delamination and crystallization at -5°C for 2 weeks;

[0030] Thermal storage stability: the decomposition rate of active ingredients is less than 3% at (54±2)°C for 2 weeks;

[0031] Emulsion stability: Emulsion diluted with any proportion of water is stable;

[0032] Stability over time: Stable at room temperature.

Embodiment 3

[0033] Embodiment 3: field efficacy test

[0034] The dinotefuran microemulsion prepared in Example 1 and a commercially available certain dinotefuran granule were used for field efficacy test. 5 treatments were set up in the test, and each application rate was shown in Table 1. Every treatment was repeated 4 times. With reference to the "Pesticide Field Efficacy Test Guidelines" of the Ministry of Agriculture, the number of insects was investigated in 1-3 days and 7 days after spraying, and the statistics and results were collected. The calculation results are shown in Table 1. The insect population reduction rate and control effect are calculated according to the following formula.

[0035]

[0036]

[0037]

[0038] Among them, PT 0 Indicates the number of living insects in the chemical treatment area before treatment; PT 1 Indicates the number of living insects in the chemical treatment area; CK 0 Indicates the number of living insects in the blank control are...

technical field

[0001] The invention relates to the field of pesticide preparations, in particular to a dinotefuran microemulsion and a preparation method thereof. Background technique

[0002] Dinotefuran (dinotefuran), the chemical name is (RS)-1-methyl-2-nitro-3-[(3-tetrahydrofuran)-methyl]guanidine, is the third-generation nicotine developed by Mitsui Chemicals, Japan Insecticides, the chemical structure of which is very different from the existing neonicotinoid insecticides, its tetrahydrofuryl group replaces the previous chloropyridyl and chlorothiazolyl groups, and does not contain halogen elements. At the same time, it is also different from nicotine in terms of performance. It is mainly used to control aphids, leafhoppers, planthoppers, thrips, whiteflies and their resistant strains on wheat, rice, cotton, vegetables, fruit trees, tobacco leaves and other crops. It is highly effective against insects of the order Pteroptera, Lepidoptera, Beetles and Totaloptera, a...

Examples

Embodiment 1

[0022] Embodiment 1: 5% dinotefuran microemulsion

[0023]

[0024] Mix dinotefuran with solvent, surface active agent and co-solvent thoroughly, then add water and stir well to form microemulsion.

Embodiment 2

[0025] Embodiment 2: Physical and chemical performance measurement

[0026] Get the dinotefuran microemulsion prepared in Example 1 and carry out the physical and chemical performance test, the results are as follows:

[0027] Appearance: clear and transparent single-phase liquid;

[0028] Transparent temperature area: minus 5°C to above 60°C;

[0029] Low temperature stability: no delamination and crystallization at -5°C for 2 weeks;

[0030] Thermal storage stability: the decomposition rate of active ingredients is less than 3% at (54±2)°C for 2 weeks;

[0031] Emulsion stability: Emulsion diluted with any proportion of water is stable;

[0032] Stability over time: Stable at room temperature.

Embodiment 3

[0033] Embodiment 3: field efficacy test

[0034] The dinotefuran microemulsion prepared in Example 1 and a commercially available certain dinotefuran granule were used for field efficacy test. 5 treatments were set up in the test, and each application rate was shown in Table 1. Every treatment was repeated 4 times. With reference to the "Pesticide Field Efficacy Test Guidelines" of the Ministry of Agriculture, the number of insects was investigated in 1-3 days and 7 days after spraying, and the statistics and results were collected. The calculation results are shown in Table 1. The insect population reduction rate and control effect are calculated according to the following formula.

[0035]

[0036]

[0037]

[0038] Among them, PT 0 Indicates the number of living insects in the chemical treatment area before treatment; PT 1 Indicates the number of living insects in the chemical treatment area; CK 0 Indicates the number of living insects in the blank control are...

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