CN109042641A - A kind of emamectin benzoate B2a/B2b benzoate granule and preparation method thereof - Google Patents
A kind of emamectin benzoate B2a/B2b benzoate granule and preparation method thereof Download PDFInfo
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/12—Powders or granules
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/22—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing ingredients stabilising the active ingredients
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
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- Agronomy & Crop Science (AREA)
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Abstract
The present invention provides a kind of emamectin benzoate B2a/B2b benzoate granules, including active constituent emamectin benzoate B2a/B2b benzoate, antidecomposition film forming agent etc..Many advantages, such as emamectin benzoate B2a/B2b benzoate granule prepared by the present invention has the lasting period long, environmentally friendly, cost of supplementary product is low, resistance of rainwater washing against etc..
Description
Technical Field
The invention relates to the technical field of pesticide production, and particularly relates to an abamectin benzoate granule and a preparation method thereof.
Background
The emamectin benzoate B2a/B2B is a macrolide disaccharide pesticide with insecticidal, acaricidal and nematicidal activities, and has the following chemical structural formula:
wherein,
r1 ═ ethyl: emamectin B2a benzoate,
r1 ═ methyl: emamectin B2B benzoate,
the emamectin benzoate B2a and the emamectin benzoate B2B are collectively called emamectin B2a/B2B benzoate.
In the past decades, abamectin is mainly researched by B1a, however, the current domestic and foreign researches show that B2a also has great application value. In recent years, the development and research on emamectin benzoate B2a/B2B benzoate products are increased by the applicant, the emamectin benzoate B2a/B2B benzoate has a wide insecticidal spectrum, has high efficiency on lepidoptera, coleoptera, hemiptera, diptera, homoptera and the like, is effective on underground pests, such as mole cricket, root maggot and root aphid, and has a special effect on nematodes.
The emamectin benzoate B2a/B2B is easy to decompose in air and soil, the half-life period under the illumination condition is 90min, the half-life period in the soil (ph5.0) is 13.5h, the half-life period in the soil (ph7.0) is 16.8h, and the half-life period in the soil (ph9.0) is 10.5 h. The conventional water dispersible granule directly contacts with air and soil in the transportation and use processes, so that the original medicine is decomposed and wasted, and the drug effect of the product is reduced. When used for preventing and controlling underground pests, the pesticide is prepared into a pesticide fertilizer for use, and the raw material medicines are directly coated on fertilizer particles after being dissolved, so that the pesticide has the defects of easy loss after being exposed to rainwater and greatly reduced lasting period.
Therefore, the development of emamectin benzoate B2a/B2B granules with high stability, decomposition resistance and light resistance is a technical problem which needs to be solved by the technical personnel in the field urgently.
Disclosure of Invention
The invention provides emamectin benzoate B2a/B2B benzoate granules, which comprise emamectin benzoate B2a/B2B benzoate and an anti-decomposition film forming agent, wherein the anti-decomposition film forming agent is waterborne polyurethane urea. The emamectin benzoate B2a/B2B granule prepared by the invention has the advantages of long lasting period, environmental friendliness, low auxiliary material cost, rain wash resistance and the like.
Based on the above findings, the present invention has been completed by the applicant. Specifically, the invention provides emamectin benzoate B2a/B2B benzoate granules, which comprise emamectin benzoate B2a/B2B benzoate and an anti-decomposition film forming agent, wherein the anti-decomposition film forming agent is waterborne polyurethane urea.
Specifically, the invention provides emamectin benzoate B2a/B2B benzoate granules, which comprise the following components in percentage by mass:
wherein, the solvent is ethylene glycol tert-butyl ether.
Wherein, the carrier is porous red sand.
Wherein the particle size of the porous red sand is 10-40 meshes, the adsorption value is 2-200g/kg, and the porous red sand is prepared by crushing red bricks, grading and screening.
In addition, the invention also provides a preparation method of the emamectin benzoate B2a/B2B benzoate granules, which comprises the following steps: mixing emamectin benzoate B2a/B2B benzoate and solvent, dissolving, adding decomposition-resistant film-forming agent, mixing, adding carrier, stirring, adsorbing, and packaging.
Specifically, the invention also provides emamectin benzoate B2a/B2B benzoate granules which are water dispersible granules and comprise the following components in percentage by mass:
wherein the wetting agent is sodium dodecyl sulfate, the dispersing agent is sodium methylene dinaphthalene sulfonate, and the ratio of the wetting agent to the dispersing agent is 1:1-5:13, preferably 1:1-3: 7.
Wherein, the filler is ammonium sulfate.
In addition, the invention also provides a preparation method of the emamectin benzoate B2a/B2B benzoate granules (water dispersible granules), which comprises the following steps: uniformly mixing emamectin benzoate B2a/B2B, a wetting agent, a dispersing agent and a filler, and performing air flow crushing to prepare ultrafine powder; mixing the film forming agent with water, adding into the superfine powder, stirring, granulating with a tabletting granulator, sieving, and packaging.
The invention has the following beneficial effects:
1) the decomposition film-forming agent forms a protective film on the emamectin benzoate B2a/B2B benzoate granules, so that the medicines are prevented from being directly exposed in the air in the preparation and transportation processes, and the decomposition of the raw medicines can be effectively prevented.
2) In the using process, the anti-decomposition film forming agent wraps the raw material medicine dispersed in water, the liquid drops are sprayed on the surface of crops, and after water is volatilized, the raw material medicine can be continuously prevented from being decomposed, so that the effect of prolonging the effective period is achieved.
3) When the soil insect pest control agent is used for controlling soil insect pests, the soil insect pest control agent is directly applied to the ground, so that the contact between the drug particles and the soil can be effectively prevented, and the lasting period is further prolonged.
4) The emamectin benzoate B2a/B2B benzoate granules adopt red sand as a carrier, the red sand has strong adsorption capacity and moderate dissolution efficiency, and the quick action can be ensured while the lasting period is prolonged; the granules disclosed by the invention are resistant to rain wash, and the drug loss is reduced. The red sand can also increase the air permeability of the soil, and the effect of improving the soil environment is achieved.
5) The emamectin benzoate B2a/B2B benzoate granules (water dispersible granules) are prepared by a tabletting and granulating method, the two steps of extrusion granulation and fluidized drying in the conventional method can be directly simplified into direct tabletting and crushing granulation, the product disintegration time is fast, the suspension rate is high, the working efficiency is greatly improved, and the energy consumption is reduced.
Detailed Description
In order to make those skilled in the art better understand the technical solution of the present invention, the following specific examples and comparative examples are provided. The raw materials and auxiliary materials used in the specific embodiment of the invention are all commercially available, the emamectin benzoate B2a/B2B benzoate is self-made by the applicant, and the preparation method is disclosed in Chinese patent CN 103214532B.
EXAMPLES 1-3/COMPARATIVE EXAMPLES 1-3 preparation of methylamino avermectin B2a/B2B benzoate granules
Prescription: see table 1.
TABLE 1 Emamectin B2a/B2B benzoate granules (Unit: mass percent)
Preparation method (granules):
mixing emamectin benzoate B2a/B2B benzoate and solvent, dissolving, adding decomposition-resistant film-forming agent, mixing, adding carrier, stirring, adsorbing, and packaging.
Preparation method (water dispersible granule, except for control example 2):
uniformly mixing emamectin benzoate B2a/B2B, a wetting agent, a dispersing agent and a filler, and crushing by using an air flow crusher to prepare ultrafine powder; mixing the film forming agent with water, spraying into the superfine powder, stirring, granulating with a tabletting granulator, sieving, and packaging.
Preparation method (water dispersible granule, control 2):
uniformly mixing emamectin benzoate B2a/B2B, a wetting agent, a dispersing agent and a filler, and crushing by using an air flow crusher to prepare ultrafine powder; mixing the film forming agent with water, adding into the superfine powder, stirring, granulating with an extrusion granulator, drying with a fluidized bed, sieving, and packaging.
Experimental example 1 detection of decomposition Rate of emamectin benzoate B2a/B2B granule
The emamectin benzoate B2a/B2B granules prepared in examples 1-3 and comparative example 1 were stored at 25 ℃, 54 ℃ and 30 ℃ for 14 days (with or without light), and the decomposition rates were determined by conventional methods for detecting water dispersible granules and granules, and the results are shown in Table 2.
TABLE 2 decomposition rate of methylamino abamectin B2a/B2B benzoate granules 14 d%
It can be seen that, when the emamectin benzoate B2a/B2B granules (examples 1-3) are exposed in the air and doped in the soil, the decomposition rate under various temperature conditions (light-proof or light-proof) is obviously lower than that of the product without the anti-decomposition film-forming agent (comparative example 1). Therefore, the decomposition rate of the emamectin benzoate B2a/B2B benzoate granules can be effectively reduced by adding the anti-decomposition film-forming agent.
Experimental example 2 prevention and treatment of peanut root-knot nematode by methylamino avermectin B2a/B2B benzoate granules
The nematodes invade the roots of plants through the tender roots to form spherical or conical white nodules with different sizes, so that the crops are damaged, and the peanuts are the main crops damaged by the root-knot nematodes.
The investigation method comprises the following steps: the prevention and treatment effect is calculated by counting the number of the root nodules
The control efficiency is (number of control nodules-number of nodules in the area of application)/number of control nodules 100%
The control effects of emamectin benzoate particles prepared in examples 1-3 and comparative example 1 on emamectin benzoate B2a/B2B are shown in table 3.
TABLE 3 prevention and treatment effects of emamectin benzoate B2a/B2B on peanut root-knot nematode
Therefore, the control effect of the emamectin benzoate B2a/B2B benzoate granules (examples 1-3) on the peanut root-knot nematodes is obviously better than that of a product (comparative example 1) without the anti-decomposition film-forming agent, and the maximum control effect reaches nearly 80% 50 days after application. The control efficiency can be further improved by changing the application time and the application method.
Experimental example 3 detection of decomposition rate of emamectin benzoate B2a/B2B granular formulation (water dispersible granule)
Emamectin benzoate B2a/B2B granules (water dispersible granules) prepared in examples 4 to 6 and comparative examples 2 to 3 were stored at 25 ℃ for 14 days (with or without light shielding), at 54 ℃ for 14 days (with or without light shielding), diluted 1000-fold, and stored at 25 ℃ for 14 days (with or without air drying), and the decomposition rates were measured by a conventional method, and the results are shown in table 4.
TABLE 4 decomposition rate of methylamino abamectin B2a/B2B benzoate granules (Water dispersible granules) 14 d%
Experimental example 4 influence of tabletting granulation method and conventional extrusion granulation method on energy consumption of granules (water dispersible granules)
The emamectin benzoate B2a/B2B granules (water dispersible granules) prepared in example 5 and comparative example 2 were subjected to index detection such as energy consumption, and the results are shown in table 5.
TABLE 5 detection results of energy consumption and the like of emamectin benzoate B2a/B2B benzoate water dispersible granules
Therefore, the emamectin benzoate B2a/B2B water dispersible granule prepared by the tabletting and granulating method is superior to the traditional extruding and granulating method in the aspects of detection indexes such as disintegration time, energy consumption and the like.
Experimental example 5 experiment for controlling pear psylla by using emamectin benzoate B2a/B2B benzoate granules (water dispersible granules)
In northern China, the period of 4-5 months is the high-emergence period of the psylla chinensis, and in the middle ten days of 4 months, a test for preventing and controlling the psylla chinensis in the field is carried out in a certain village in Xinji city, Hebei province.
The investigation method comprises the following steps: the prevention efficiency is (number of worm openings before drug application-number of worm openings after drug application)/number of worm openings before drug application is 100%
The results are shown in Table 6.
TABLE 6 Experimental results of controlling Pear Wood louse with methylamino avermectin B2a/B2B benzoate granule (Water dispersible granule)
Therefore, the added anti-decomposition film forming agent has obvious effect in the experiment of controlling the psylla chinensis, but the preparation methods are different, and the control effect of the psylla chinensis is influenced, namely the control effect of the product by the extrusion granulation method is lower than that by the tabletting granulation method.
Example 6 Emamectin B2a/B2B benzoate granule (Water dispersible granule) experiment for preventing and treating Myzus persicae
3-5 months in the yellow river valley are the high-development period of the green peach aphids, and the experiment for preventing and controlling the green peach aphids in the field is carried out in a certain village in Zhao county in Hebei province in the beginning of 4 months.
The investigation method comprises the following steps: the prevention efficiency is (number of worm openings before drug application-number of worm openings after drug application)/number of worm openings before drug application is 100%
The results are shown in Table 7.
TABLE 7 results of experiments on preventing and treating Myzus persicae with emamectin benzoate B2a/B2B benzoate granules (water dispersible granules)
Therefore, the addition of the anti-decomposition film-forming agent has obvious effect in the experiment of preventing and controlling the myzus persicae, but the preparation methods are different, and the prevention effect of the myzus persicae is influenced, namely the prevention effect of the product by the extrusion granulation method is lower than that by the tabletting granulation method.
Example 7 Emamectin B2a/B2B benzoate granule (Water dispersible granule) control experiment of Cnaphalocrocis medinalis
Guangxi province is a big province for rice planting, rice leaf rollers and chilo suppressalis are the most harmful insect pests to rice, the rice leaf rollers and the chilo suppressalis start to log in at the beginning of 5 months every year, pesticide application can effectively prevent and control the rice leaf rollers before logging in, and field pesticide effect tests are carried out on the rice leaf rollers at the beginning of 5 months.
The investigation method comprises the following steps: the prevention efficiency is equal to the number of dead insects after the pesticide is applied/(the number of dead insects after the pesticide is applied + the number of live insects) × 100%
The results are shown in Table 8.
TABLE 8 Experimental results of Emamectin B2a/B2B benzoate granule (Water dispersible granule) for controlling Cnaphalocrocis medinalis
Therefore, the added anti-decomposition film-forming agent product has obvious effect in the experiment of preventing and controlling the rice leaf rollers, but the preparation methods are different, and the prevention effect of the rice leaf rollers is influenced, namely the prevention effect of the product by the extrusion granulation method is lower than that by the tabletting granulation method.
Claims (10)
1. The emamectin benzoate B2a/B2B benzoate granules comprise emamectin benzoate B2a/B2B benzoate and an anti-decomposition film forming agent, wherein the anti-decomposition film forming agent is waterborne polyurethane urea.
2. Emamectin benzoate B2a/B2B granules according to claim 1, consisting of, in mass percent:
3. emamectin benzoate granules according to claim 2, wherein the solvent is ethylene glycol tert-butyl ether, emamectin benzoate B2 a/B2B.
4. Emamectin benzoate granules according to claim 2, wherein the carrier is porous red sand, emamectin benzoate B2 a/B2B.
5. Emamectin benzoate granules according to claim 3, in the form of B2a/B2B, wherein the porous red sand has a particle size of 10-40 mesh and an adsorption value of 2-200 g/kg.
6. A method for preparing emamectin benzoate granules according to any one of claims 2 to 5, comprising the following steps: mixing emamectin benzoate B2a/B2B benzoate and solvent, dissolving, adding decomposition-resistant film-forming agent, mixing, adding carrier, stirring, adsorbing, and packaging.
7. Emamectin benzoate granules according to claim 1, in the form of water dispersible granules consisting of, in mass%:
8. the emamectin benzoate B2a/B2B granule of claim 7, wherein the wetting agent is sodium lauryl sulfate, the dispersing agent is sodium methylenedinaphthalene sulfonate, and the ratio of the wetting agent to the dispersing agent is 1:1-5: 13.
9. Emamectin B2a/B2B benzoate granules according to claim 7, wherein the filler is ammonium sulfate.
10. A process for the preparation of emamectin benzoate B2a/B2B granules as claimed in any one of claims 7 to 9, comprising the steps of: uniformly mixing emamectin benzoate B2a/B2B, a wetting agent, a dispersing agent and a filler, and performing air flow crushing to prepare ultrafine powder; mixing the film forming agent with water, adding into the superfine powder, stirring, granulating with a tabletting granulator, sieving, and packaging.
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