Water-soluble solid insecticide and preparation method thereof

Abstract

The invention discloses a water-soluble solid insecticide and a preparation method thereof, the insecticide is a water-soluble tablet or granule, and the insecticide comprises the following components in percentage by mass: 30-80% of thiocyclam, 0-30% of an insecticide B, 0.1-2% of a pH regulator, 0.1-0.5% of an attractant, 1-20% of a surfactant and the balance of filler. The preparation method comprises the steps of material mixing, airflow crushing, water adding and kneading, forming, drying, screening and packaging. The insecticide disclosed by the invention adopts a water-soluble tablet or granule and is free from precipitation after being dissolved in water, so that the environmental pollution in the production and use processes is reduced, the shelf life of the product is prolonged, and the lasting period for preventing and treating harmful insects of crops can be prolonged.

Description

Technical Field

[0001] The present invention relates to the field of pesticide research and development, and in particular to a water-soluble solid insecticide and a preparation method thereof. Background Art

[0002] Cyclopentane, also known as cyclopentane, N,N-dimethyl-1,2,3-trithiacyclohexane-5-amine and its oxalate, has a molecular weight of 271.26 and a melting point of 125-128°C (decomposition).

[0003] The insecticide ring is a selective insecticide with stomach poison, contact and systemic effects. It can be transmitted to the top and has a lasting effect of 7 to 14 days for the prevention and control of Lepidoptera and Coleoptera pests. It can also prevent and control parasitic nematodes, such as rice white-tip nematode, and has certain preventive effects on rust and white panicle of some crops. In addition, it can prevent and control rice stem borer, rice leaf roller, striped stem borer, rice thrips, leafhoppers, rice gall midge, planthoppers, peach aphids, apple aphids, apple red spider, pear star caterpillar, citrus leaf miner, vegetable pests, etc.

[0004] Insecticidal ring is the first animal-derived insecticide successfully developed by humans in the 1960s. Its green, high-efficiency and low-residue characteristics are in line with the current advocacy of green agriculture. At the same time, this type of product is inexpensive and not prone to resistance, and will play an important role in the future.

[0005] Domestic patent application number CN200810150134.6 discloses an insecticide composition containing a cyclophane and provides methods for preparing soluble granules of cyclophane and acetamiprid. However, the preparation of the soluble granules uses anionic surfactants and non-water-soluble fillers, preventing them from being fully water-soluble. This can lead to precipitation and clogging of spray nozzles during use, making them unsuitable for aerial spraying and other application methods that require high uniformity of the pesticide solution. Other published patents related to cyclophane do not report on technologies related to soluble granules.

[0006] Currently known registered products are primarily powder formulations, including wettable powders and soluble powders. The only liquid formulation is a dispersible oil suspension concentrate (DOSC) formulated with spinosad. Both wettable powders and DOSCs pose environmental risks through dust dispersion during production and use, posing adverse health risks to workers and users. DSCs are unstable systems, making processing difficult. They are prone to caking during long-term storage, making them inconvenient to use and resulting in a short shelf life. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to provide a water-soluble solid insecticide and a preparation method thereof, which adopts water-soluble tablets or granules, which do not precipitate after being dissolved in water, thereby reducing environmental pollution during production and use, extending the shelf life of the product, and increasing the duration of effectiveness in controlling crop pests.

[0008] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is: a water-soluble solid insecticide, which is a water-soluble tablet or granule, and the mass percentages of the components of the insecticide are: insecticide ring: 30-80%, insecticide B: 0-30%, pH regulator: 0.1-2%, attractant: 0.1-0.5%, surfactant: 1-20%, and filler making up the rest to 100%.

[0009] Preferably, the cyclopentadiene is cyclopentadiene oxalate.

[0010] Preferably, the insecticide B is any one of dinotefuran, acetamiprid, nitenpyram, flonicamid and thiamethoxam.

[0011] Preferably, the pH adjuster includes any one of a hydroxyl-containing carboxylic acid, a hydroxyl-containing citric acid, a hydroxyl-containing tartaric acid, a hydroxyl-containing lactic acid, a hydroxyl-containing glycolic acid or a hydroxyl-containing salicylic acid.

[0012] Preferably, the attractant includes any one of pyrimidine, pyrimidine, and raspberry ketone, or a combination of any two to three of them.

[0013] Preferably, the surfactant is any one of JFC, block polyether or polyethylene glycol, or a combination of any two to three of them.

[0014] Preferably, the filler is a water-soluble non-ionic organic matter.

[0015] Preferably, the water-soluble non-ionic organic matter includes any one of trehalose, water-soluble starch, and maltodextrin, or a combination of any two to three of them.

[0016] The present invention also discloses a method for preparing a water-soluble solid insecticide, comprising the following steps:

[0017] S1. Material mixing: introducing the insecticide loop, insecticide B, pH adjuster, attractant, surfactant and filler into a high-speed mixer through a vacuum feeder for mixing to obtain an insecticide mixture;

[0018] S2, air flow milling: crushing the pesticide mixture by air flow mill;

[0019] S3. Add water and knead: only applicable to granules;

[0020] S4, molding: using a rotary extrusion granulator to obtain granules; using a tablet press to obtain tablets;

[0021] S5, drying: drying the granules by a fluidized bed dryer;

[0022] S6. Screening: Screening is performed through a vibrating screen to remove granules or tablets that do not meet the size standards;

[0023] S7. Packaging: Use the horizontal packaging machine to classify and pack the granules or tablets.

[0024] The beneficial effects of adopting the above technical solution are:

[0025] (1) The soluble granules and soluble tablets are both environmentally friendly dosage forms, which reduce harm to the human body and environmental pollution during production and use.

[0026] (2) The use of non-ionic surfactants can better exert the efficacy of the active ingredients and promote the spread and adhesion of the active ingredients on the target.

[0027] (3) The product has good water solubility, is completely water-soluble, and dissolves quickly.

[0028] (4) Insect attractants are added to the product, which can improve the effectiveness of the insecticide ring and extend the service life of the insecticide ring.

[0029] (5) The production process is simple and the production equipment selection is easy.

[0030] (6) The present invention solves the production technology problem of granulating the insecticide ring product by optimizing the component screening and preparation process.

[0031] (7) Use water-soluble tablets or granules that do not precipitate after dissolving in water. The solid form of granules or tablets can extend the shelf life of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a diagram of the pest and disease status of pepper flowers before the use of the insecticide of the present invention;

[0033] Figure 2 This is a diagram showing the killing effect of pests and diseases on pepper flowers after the insecticide of the present invention is used;

[0034] Figure 3 This is a diagram showing the pest and disease status of roses before the insecticide of the present invention is used;

[0035] Figure 4 The figure is a diagram showing the killing effect of plant diseases and insect pests on roses after the insecticide of the present invention is used. DETAILED DESCRIPTION

[0036] Example 1 80% cyclopentane soluble granules

[0037] Insecticidal loop: 80%, tartaric acid: 0.5%, raspberry ketone: 0.1%, JFC: 0.5%, polyvinyl alcohol 8000: 10%, trehalose: balance to 100%.

[0038] The production process involves mixing materials, airflow milling, kneading with water, granulating, drying, screening, and packaging to produce 80% soluble granules of the insecticide ring. Raspberry ketone and JFC are mixed, heated, and dissolved, and then added to the materials in liquid form during kneading with water.

[0039] Example 2 30% cyclopentane soluble granules

[0040] Insecticidal ring 30%, glycolic acid: 0.1%, raspberry ketone: 0.1%, PE-10500: 6%, trehalose: 20%, water-soluble starch: make up to 100%.

[0041] The production process is the same as that of Example 1. Raspberry ketone and PE-10500 are mixed, heated and dissolved, and then added to the material in liquid form when water is added and kneaded.

[0042] Example 3 50% cyclohexane soluble tablets

[0043] Insecticidal loop: 80%, tartaric acid: 0.2%, D800: 1%, polyvinyl alcohol 8000: 10%, trehalose: 20%, water-soluble starch: make up the balance to 100%.

[0044] Production process: material mixing, air flow crushing, high-speed mixing, tableting, screening, packaging. D800 is heated into liquid and added into the high-speed mixer in liquid form for uniform mixing.

[0045] Example 4 60% thiophanate-nitenpyram soluble tablets (30%+30%)

[0046] Cyclopentasiloxane: 30%, Nitenpyram: 30%, D800: 1%, polyvinyl alcohol 10000: 12%, trehalose: 20%, maltodextrin: make up the remainder to 100%.

[0047] Production process: Same as Example 3. Nitenpyram does not need to be jet-milled, but is mixed in a high-speed mixer and then tableted.

[0048] Example 5 45% thiophanate-acetamiprid soluble granules

[0049] Cyclopentasiloxane: 40%, acetamiprid 5%, lactic acid: 1.0%, JFC: 1%, polyvinyl alcohol 8000: 20%, trehalose: 20%, maltodextrin: make up the remainder to 100%.

[0050] Production process: same as Example 1.

[0051] Example 6 60% dimethoprim-dinotefuran soluble granules

[0052] Cyclopentane: 45%, dinotefuran: 15%, salicylic acid: 0.5%, PE-10500: 1%, polyvinyl alcohol 10000: 12%, trehalose: 20%, maltodextrin: make up the remainder to 100%.

[0053] Production process: same as Example 1.

[0054] Example 7 70% thiophanate-nitenpyram soluble granules

[0055] Cyclopentasiloxane: 50%, Nitenpyram: 20%, D800: 1%, polyvinyl alcohol 10000: 12%, trehalose: 20%, maltodextrin: make up the remainder to 100%.

[0056] Production process: same as Example 1.

[0057] Example 8 65% thiophanate-thiamethoxam soluble granules

[0058] Cyclopentacyclo: 60%, thiamethoxam 5%, citric acid: 0.5%, pyrimidine: 0.4%, JFC: 2%, polyvinyl alcohol 10000: 15%, trehalose: make up the balance to 100%.

[0059] Production process: same as Example 1.

[0060] Example 9 80% thiophanate-dinotefuran soluble granules

[0061] Insecticidal loop: 70%, dinotefuran 10%, citric acid: 0.5%, chloranil: 0.2%, D800: 1%, polyvinyl alcohol 10000: 9%, trehalose: make up the balance to 100%.

[0062] Production process: same as Example 3.

[0063] Example 10 85% Cypermethrin and Flonaxpyrad Soluble Granules

[0064] Insecticidal loop: 80%, flonicamid 5%, glycolic acid: 0.3%, raspberry ketone: 0.2%, JFC: 0.5%, PE10500: 1%, polyvinyl alcohol 8000: make up the balance to 100%.

[0065] Attachment Figure 1-4 It can be seen that this insecticide has a significant killing effect on pests and diseases.

[0066] The above description is only provided as an implementable technical solution of the present invention, and is not intended to be a single limitation on the technical solution itself.

Claims

1. A water-soluble solid insecticide, characterized in that: The insecticide is a water-soluble tablet or granule, and the mass percentages of the components of the insecticide are: insecticide ring: 30-80%, insecticide B: 0-30%, pH regulator: 0.1-2%, attractant: 0.1-0.5%, surfactant: 1-20%, and filler making up the rest to 100%.

2. The water-soluble solid insecticide according to claim 1, wherein: The insecticide ring is insecticide ring oxalate.

3. The water-soluble solid insecticide according to claim 1, wherein: The insecticide B is any one of dinotefuran, acetamiprid, nitenpyram, flonicamid and thiamethoxam.

4. The water-soluble solid insecticide according to claim 1, wherein: The pH regulator includes any one of a carboxylic acid containing a hydroxyl group, a citric acid containing a hydroxyl group, a tartaric acid containing a hydroxyl group, a lactic acid containing a hydroxyl group, a glycolic acid containing a hydroxyl group, or a salicylic acid containing a hydroxyl group.

5. The water-soluble solid insecticide according to claim 1, wherein: The attractant comprises any one of pyrimidine, pyrimidine and raspberry ketone or a combination of any two to three of them.

6. The water-soluble solid insecticide according to claim 1, wherein: The surfactant is any one of JFC, block polyether or polyethylene glycol, or a combination of any two to three of them.

7. The water-soluble solid insecticide according to claim 1, wherein: The filler is a water-soluble non-ionic organic matter.

8. The water-soluble solid insecticide according to claim 7, characterized in that: The water-soluble non-ionic organic matter includes any one of trehalose, water-soluble starch, and maltodextrin, or a combination of any two to three of them.

9. The method for preparing the solid insecticide according to any one of claims 1 to 7, characterized in that The following steps are involved: S1. Material mixing: introducing the insecticide loop, insecticide B, pH adjuster, attractant, surfactant and filler into a high-speed mixer through a vacuum feeder for mixing to obtain an insecticide mixture; S2, air flow milling: crushing the pesticide mixture by air flow mill; S3. Add water and knead: only applicable to granules; S4, molding: using a rotary extrusion granulator to obtain granules; using a tablet press to obtain tablets; S5, drying: drying the granules by a fluidized bed dryer; S6. Screening: Screening is performed through a vibrating screen to remove granules or tablets that do not meet the size standards; S7. Packaging: Granules or tablets are classified and packaged using a horizontal packaging machine.

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