Metalaxyl-M and azoxystrobin sustained-release agent and preparation method and application thereof

A technology for metalaxyl and azoxystrobin, applied in the field of pesticides, can solve the problems of poor efficacy, difficult control, and short duration of effect, and achieve the effects of reducing production costs, excellent control effects, and delaying drug resistance.

Pending Publication Date: 2021-02-19
INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Chinese patent CN 105409963 discloses a composition containing high-efficiency metalaxyl and azoxystrobin, wherein one of the wall materials of the capsules used in the microcapsules contains formaldehyde, and the incomplete reaction will cause formaldehyde to remain in the product. will have a serious impact on the environment
[0005] (1) In the prior art, mefenaxyl and azoxystrobin are easy to degrade in the environment, and the conventional dosage forms cannot guarantee the duration of the two original drugs, and problems such as poor efficacy and short duration of efficacy are prone to occur, resulting in waste of pesticides and environmental pollution
[0006] (2) The incomplete reaction in the prior art will cause formaldehyde to remain in the product, which will have a serious impact on the environment
[0007] (3) At present, soil-borne diseases of lilies are serious and difficult to control. The existing pesticides have poor control effects and short duration. Therefore, a large number of pesticides are used in the lily planting process, which leads to environmental pollution and shortens the resistance of bacteria. Production time, while increasing the production cost of farmers, the yield and quality of lily are greatly reduced

Method used

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  • Metalaxyl-M and azoxystrobin sustained-release agent and preparation method and application thereof
  • Metalaxyl-M and azoxystrobin sustained-release agent and preparation method and application thereof
  • Metalaxyl-M and azoxystrobin sustained-release agent and preparation method and application thereof

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preparation example Construction

[0044] Such as figure 1 As shown, a kind of preparation method of metalaxyl-ethyl and azoxystrobin microcapsule suspension provided by the embodiment of the present invention comprises the following steps:

[0045] S101: uniformly mixing metalaxyl-ethyl, azoxystrobin, capsule material monomer and solvent to obtain an oil phase.

[0046] S102: uniformly mixing the protective glue, surfactant, defoamer and water to obtain a water phase.

[0047] S103: adding the oil phase into the water phase for shear emulsification to obtain an emulsion.

[0048] S104: Heat the emulsion to 30-70°C, add a cross-linking agent, make the monomer of the capsule material contact with the cross-linking agent, and polymerize at the oil-water interface, react for 1-2 hours, then add a viscosity modifier and an antifreeze agent and preservatives, and then continue to react for 0.5 to 1 hour to obtain the metalaxyl-azoxystrobin microcapsule suspension.

[0049] In S101 provided in the embodiment of th...

Embodiment 1

[0066] Preparation of 60% metalaxyl-azoxystrobin microcapsule suspension, metalaxyl (active ingredient, calculated by 100%) 58.5%, azoxystrobin (active ingredient, calculated by 100%) 1.5%, 200# Solvent oil (oil phase solvent) 5%, isophorone diisocyanate (capsule material monomer) 3%, ethylenediamine (crosslinking agent) 0.5%, gum arabic powder (protective glue) 5%, lignin sulfonate Sodium acid (surfactant) 1%, silicone defoamer (defoamer) 0.1%, xanthan gum (viscosity modifier) ​​0.5%, glycerol (antifreeze) 1%, Kathon (preservative) 0.1%, deionized water (water phase solvent) make up 100%.

[0067] Step 1: Weigh metalaxyl-fine and azoxystrobin respectively, add 200# solvent oil and isophorone diisocyanate, and stir evenly as the oil phase;

[0068] Step 2: Weighing gum arabic powder and dissolving it in deionized water, adding sodium lignosulfonate and organic silicon defoamer, stirring evenly as the water phase;

[0069] Step 3: Slowly add the oil phase prepared in step 1 t...

Embodiment 2

[0072]Preparation of 42% metalaxyl-azoxystrobin microcapsule suspension, metalaxyl (active ingredient, in 100%) 40%, azoxystrobin (active ingredient, in 100%) 2%, 200# Solvent oil (oil phase solvent) 25%, isophorone diisocyanate (capsule material monomer) 0.3%, ethylenediamine (crosslinking agent) 0.1%, gum arabic powder (protective glue) 1%, lignin sulfonate Sodium acid (surfactant) 0.2%, silicone defoamer (defoamer) 0.1%, xanthan gum (viscosity modifier) ​​0.1%, glycerol (antifreeze) 4%, Kathon (preservative) 0.1%, deionized water (water phase solvent) make up 100%.

[0073] According to the formula in Example 2, weigh metalaxyl-ethyl, azoxystrobin and other materials, and operate with reference to the preparation method in Example 1 to obtain 42% metalaxyl-azoxystrobin microcapsule suspension.

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Abstract

The invention belongs to the technical field of pesticides, and discloses a metalaxyl-M and azoxystrobin sustained-release agent and a preparation method and an application thereof. The metalaxyl-M and azoxystrobin sustained-release agent comprises two dosage forms: a microcapsule suspending agent and sustained-release granules; the microcapsule suspending agent is prepared by taking polyurea, polyamide and the like as wall materials and metalaxyl-M and azoxystrobin as capsule cores. The sustained-release granules are prepared by adding an inert carrier and stirring after the microcapsule suspending agent is prepared. The bactericidal spectrum is expanded, and the agent has an excellent prevention and treatment effect on soil-borne diseases on lilies. Through reasonable compounding of thetwo effective components, the agent has an obvious synergistic effect and a yield increasing effect, and delays the generation of drug resistance. The lasting period is longer, the growth of lily is safe, the dosage is reduced, and the production cost is reduced. The metalaxyl-M and azoxystrobin sustained-release granules do not need to be mixed with water, can be spread or mixed with soil, are convenient to use, and solve the problem of difficulty in pesticide application in water-deficient areas.

Description

technical field [0001] The invention belongs to the technical field of pesticides, and in particular relates to a slow-release agent of metalaxyl and azoxystrobin and its preparation method and application. Background technique [0002] At present, lily is a bulbous flower of the genus Lilium of the family Liliaceae, which has medicinal, edible, essence extraction and ornamental value, and has extremely high economic benefits. Therefore, it is planted all over the country, especially the lily planting in the northern region. In order to create better production benefits, the planting area of ​​lily in facilities is increased year by year, but lily is a kind of flower that is more susceptible to diseases, and the continuous cropping for many years makes the soil corresponding The pathogenic bacteria in Lily can reproduce year after year, causing the frequent occurrence of diseases, which has become one of the important factors affecting the production of lilies. Fungal disea...

Claims

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Application Information

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IPC IPC(8): A01N37/46A01N43/54A01N25/28A01N25/12A01P3/00
CPCA01N25/12A01N25/28A01N37/46A01N43/54
Inventor 任立瑞曹坳程颜冬冬王秋霞李园郭美霞
Owner INST OF PLANT PROTECTION CHINESE ACAD OF AGRI SCI
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