CN109430262B - Flying spray-preventing assistant and preparation method and application thereof - Google Patents
Flying spray-preventing assistant and preparation method and application thereof Download PDFInfo
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- CN109430262B CN109430262B CN201811503642.8A CN201811503642A CN109430262B CN 109430262 B CN109430262 B CN 109430262B CN 201811503642 A CN201811503642 A CN 201811503642A CN 109430262 B CN109430262 B CN 109430262B
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Images
Classifications
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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
- A01N25/30—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 characterised by the surfactants
-
- 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
-
- 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
- A01N25/24—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 to enhance the sticking of the active ingredients
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- Life Sciences & Earth Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Pest Control & Pesticides (AREA)
- Plant Pathology (AREA)
- Agronomy & Crop Science (AREA)
- Engineering & Computer Science (AREA)
- Dentistry (AREA)
- Wood Science & Technology (AREA)
- Zoology (AREA)
- Environmental Sciences (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
Abstract
The invention discloses a flying spray-preventing assistant and a preparation method and application thereof, belonging to the technical field of pesticide preparations and pesticide application. The flying spray-preventing auxiliary agent comprises the following components in percentage by mass: 70-94% of vegetable oil, 5-20% of emulsifier and 1-10% of co-emulsifier; when the spray solution is prepared, the auxiliary agent is mixed with the pesticide and water, wherein the oil and the water form water-in-oil emulsion (turbid) liquid under the action of the emulsifier and the auxiliary emulsifier, the active ingredients in the pesticide preparation are uniformly dispersed in the oil phase or the water phase of the oil-based emulsion (turbid) liquid, water-in-oil fog drops with moderate particle size are formed by spraying through a hydraulic or centrifugal spray head, and the influence of excessive oil on leaf surface formation of crops is reduced; the fog drops rapidly expand when moving to the surface of a plant, and the interference of a wind field generated by a rotor wing of the unmanned aerial vehicle on the sedimentation and adhesion behaviors of the fog drops can be obviously reduced; after water is added, water-in-oil emulsion is formed, the specific gravity of the auxiliary agent is improved, the sedimentation of fog drops is accelerated, and the drifting of the fog drops is reduced.
Description
Technical Field
The invention relates to the technical field of pesticide preparations and pesticide application, in particular to a flying spray-preventing assistant and a preparation method and application thereof.
Background
At present, the agricultural field of China faces the problem of serious labor shortage, the production and development of agriculture are greatly limited, and the cost of agricultural production is increased year by year. And use unmanned aerial vehicle to carry out plant protection and fly to prevent the fog and improved the work efficiency of crops sick worm grass and pest prevention and control greatly, application scope is wide, also can spray the pesticide freely in complicated topography, saves the manual work, can not only alleviate the not enough problem of rural labour effectively, has very big promotion effect to agricultural mechanization and intelligent development moreover.
In recent years, along with the development of unmanned aerial vehicle technology, the application of unmanned aerial vehicle in agricultural production is more and more common, especially in the aspect of pesticide spraying, because of its use-saving, efficient and by wide application in the plant protection field. However, in the actual operation process, the effect of spraying during low-altitude flight of the unmanned aerial vehicle is influenced by the pesticide spraying diluent and the spraying apparatus, so that the control effect of the unmanned aerial vehicle is often inferior to that of manual pesticide application.
The traditional pesticide spraying equipment has the biggest characteristic that the water consumption per mu is required to be 30-50L, and the advantage of large water consumption is that the pesticide liquid can be ensured to uniformly cover all parts of protected plants. But the water consumption per mu of conventional unmanned aerial vehicle spraying is between 0.5L-2L, belongs to low capacity or super low capacity spraying, and the droplet after a small amount of water sprays as the diluent is very easily evaporated at unmanned aerial vehicle flight prevention operation in-process, and the drift influence of wind field environment that the unmanned aerial vehicle rotor produced to the droplet is great.
At present, when unmanned aerial vehicles fly to prevent spray in China, the same as manual spraying, water is added to a pesticide preparation sold in the market for dilution, and 1% -10% of a flying prevention tank mixing auxiliary agent is added to increase the adhesion or settleability of spray droplets during partial operation. The main categories of the flight control aids are: 1) the organic silicon can effectively reduce the surface tension of the solution, is beneficial to wetting and spreading of the fog drops on the surface of a target, reduces the rebound of the fog drops and further improves the deposition amount. The permeability is good, which is beneficial for the liquid medicine to directly enter the target body through the air holes, thereby leading the liquid medicine to absorb more liquid medicine in a limited time. However, the organosilicon auxiliary agent has little effect on drift resistance, volatilization resistance and compatibility, and is not suitable to be directly used as a special flying prevention auxiliary agent. 2) The high molecular polymers are synthesized by natural raw materials or chemical engineering, such as polyacrylamide and the like, and can improve the viscosity of a system, thereby improving the particle size of fog drops and reducing drift. The adhesive force of the spray liquid drops can be improved, and rebound and sliding are reduced, so that the deposition amount per unit area is improved. 3) Vegetable oil is extracted from semen glycines, etc. or esterified. The vegetable oil can make the liquid drop quickly attach and spread on the target. The vegetable oil contains a large amount of fatty acid, and a molecular film is formed on the surface of the liquid drop, so that the volatilization of water is reduced. The vegetable oil is beneficial to dissolving or loosening the wax layer on the surface of the plant leaves and promoting the penetration and absorption of the liquid medicine.
Firstly, after the flying spray prevention tank mixing auxiliary agent is added and the medicament is diluted by water, the inhibition effect of the evaporation of the fog drops is not obvious because of the influence of the temperature, the air flow and the air pressure in the field environment in the spraying process; secondly, an ultra-low-volume spray preparation or oil for flying prevention, which is characterized in that oil is used as a continuous phase, and pesticide is dispersed or dissolved in the oil and sprayed. However, in the south of China, main pests and diseases are concentrated between 5 months and 10 months, the climate is hot, oil is directly sprayed on crops as spraying diluent, and the oil is easily dissolved in a waxy layer on the surfaces of the crops to form oil spots, so that the plants are damaged in growth, and foliar phytotoxicity spots are formed.
Therefore, the research and development of the novel auxiliary agent special for the unmanned aerial vehicle pesticide spray with the evaporation resistance and the drift resistance is a key technical problem which needs to be solved urgently in flight control pesticide application.
Disclosure of Invention
The invention aims to provide a special auxiliary agent for spraying and pesticide applying during flying of an unmanned aerial vehicle, which is used for solving the problems of easiness in evaporation and drifting, low settling rate and the like of fog drops in the flying of the existing unmanned aerial vehicle and remarkably enhancing the adhesiveness, permeability and medicament absorptivity of the fog drops on the body surface of plants or pests, thereby ensuring the spraying efficiency and the prevention and control effect of the spraying and pesticide applying during the flying of the plant protection.
In order to achieve the purpose, the invention adopts the following technical scheme:
a fly spray prevention auxiliary agent comprises the following components in percentage by mass: 70-94% of oil, 5-20% of emulsifier and 1-10% of co-emulsifier;
the vegetable oil can effectively promote the penetration and absorption of the effective components of the pesticide to plants, and can also enhance the adhesion of the effective components on the surfaces of the plants for non-systemic pesticides. The invention forms water-in-oil emulsion (turbid) liquid by adding a certain amount of surfactant and co-emulsifier and adding water in proper proportion, reduces the oil dosage in the existing ultra-low volume spraying, reduces the influence of excessive oil on the leaf spot formation of the crop leaf surface while reducing the cost; meanwhile, the uniform spreading of the fog drops on the surface of the plant can be effectively promoted, and the coverage area of the fog drops is enlarged.
The vegetable oil is one or more of methyl oleate, methyl esterified soybean oil, soybean oil and methyl laureate.
The emulsifier has the advantages of reducing surface tension, increasing wetting and permeability and the like, is an important aid for forming the water-in-oil system of the aid, ensures the emulsion stability of the flying spray prevention aid at high/low temperature, and ensures that the system of the aid is not easy to be demulsified by added pesticide preparations.
The emulsifier is one or a compound combination of fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether-organic phosphate ester composite emulsifier, polyoxyethylene sorbitan fatty acid ester, organic phosphate ester, sorbitan fatty acid ester, castor oil polyoxyethylene ether, alkylphenol alkoxylate, alkyl glycoside, hydroxyl polyethylene oxide block polymer and propylene glycol block polyether.
The co-emulsifier increases the solubilizing and co-emulsifying functions of the oil in the spray auxiliary agent system to the emulsifier, ensures that the emulsifier can be fully dissolved in the oil and forms a stable emulsion system.
The auxiliary emulsifier is one or more of polyethylene glycol, ethanol, isopropanol, n-butanol and isobutanol. Under the action of the auxiliary emulsifier mainly comprising alcohols, the capability of the flying spray-proof auxiliary agent for resisting the influence of high and low temperatures is promoted to be stably improved, the auxiliary agent system is stable at the temperature of minus 10-54 ℃, and the formed emulsion is stable.
The auxiliary agent system provided by the invention is in a liquid state, has moderate liquidity and has good compatibility with various conventional pesticide formulations on the market which need to be added.
Preferably, the flying spray prevention assistant comprises the following components in percentage by mass: 70-85% of vegetable oil, 10-20% of emulsifier and 3-10% of co-emulsifier;
the vegetable oil is one or a compound combination of methyl oleate, methyl esterified soybean oil and soybean oil;
the emulsifier is one or a compound combination of fatty alcohol-polyoxyethylene ether, a fatty alcohol-polyoxyethylene ether-organic phosphate compound, polyoxyethylene sorbitan fatty acid ester, organic phosphate, sorbitan fatty acid ester, castor oil polyoxyethylene ether, an alkylphenol alkoxy compound, a hydroxyl polyethylene oxide block polymer and propylene glycol block polyether;
the coemulsifier is one or the combination of isopropanol, normal butanol and isobutanol.
Preferably, the flying spray-preventing assistant comprises the following components in percentage by mass: 70-80% of vegetable oil, 10-20% of emulsifier and 5-10% of co-emulsifier;
the vegetable oil is one or a compound combination of methyl oleate and methyl esterified soybean oil; the amount of the oil in the auxiliary agent can be, but not limited to, 70%, 75%, 78%, 80% and the like;
the emulsifier is one or a compound combination of fatty alcohol-polyoxyethylene ether, a fatty alcohol-polyoxyethylene ether-organic phosphate compound, polyoxyethylene sorbitan fatty acid ester, organic phosphate, sorbitan fatty acid ester, castor oil polyoxyethylene ether, hydroxyl polyethylene oxide block polymer and propylene glycol block polyether; the dosage of the emulsifier in the auxiliary agent can be, but not limited to, 10%, 13%, 15%, 18%, 19%, 20% and other percentage contents;
the co-emulsifier is one or a compound combination of n-butyl alcohol and isobutyl alcohol. The amount of the co-emulsifier in the auxiliary agent can be, but not limited to, 5%, 7%, 9%, 10% and the like.
The invention also provides a method for preparing the flying spray-preventing assistant, which comprises the following steps: and mixing the emulsifier and the co-emulsifier, adding the mixture into oil, stirring and dissolving, and shearing the mixture for 5 to 20 minutes by a homogenizer at 2000-3000 r/min to form uniform and stable oil-based liquid, thus obtaining the flying spray prevention assistant.
When the plant protection unmanned aerial vehicle is used for flying defense operation, the flying anti-spraying assistant provided by the invention is used for diluting the pesticide agent, and the assistant and most of pesticide preparations sold on the market can form stable water-in-oil emulsion with water. The formed water-in-oil emulsion contains oil and water, has wide adaptability to pesticide preparations in the using process, can effectively dilute and mix pesticide preparation formulations with dispersed oil or dispersed water, and particularly has the following pesticide formulation which is suitable for being mixed with the auxiliary agent of the invention: aqueous emulsion, microemulsion, aqueous suspension, oil suspension, water dispersible granule, wettable powder, missible oil, soluble liquid, aqueous (liquid) agent and ultra-low-volume spraying oil agent.
The invention provides a preparation method of a flying spray preventing liquid, which comprises the following steps:
premixing oil-based pesticide or dry pesticide and the flying spray prevention additive, adding water, oscillating and mixing to prepare flying spray prevention liquid;
after the water-based pesticide is premixed with water, the flying spray-preventing assistant is added, and the mixture is vibrated and mixed to prepare the flying spray-preventing liquid.
The oil-based formulations refer to oil suspending agents, missible oil and ultra-low-volume spraying oil agents.
The dry preparation refers to water dispersible granules and wettable powder.
The water-based dosage form refers to an aqueous emulsion, a microemulsion, an aqueous suspension, a soluble liquid, a liquid or an aqueous solution.
The water used is deionized water, city domestic water (tap water) or natural water.
Preferably, the mixing volume ratio of the flying spray-preventing assistant to the water phase is 1: 0.1-1.5. The water phase comprises water and a water-based pesticide, the flying spray preventing liquid prepared by the invention is a water-in-oil emulsion (turbid) liquid, wherein the water phase accounts for a certain proportion, and when the spraying liquid is prepared, the water-based pesticide volume is calculated into the water-adding volume (water phase) proportion according to the pesticide formulation proportion; the volume of non-aqueous preparations such as oil-based formulations and dry formulations does not account for the total volume of the flying spray-preventing liquid. More preferably, the mixing volume ratio of the fly spray aid to the aqueous phase is 1.25: 1.
The invention also provides the flying spray preventing liquid prepared by the preparation method. Research shows that the assistant of the invention is added with medicament and water to be stirred, oscillated and mixed to form water-in-oil spray diluent, the conductivity is measured to be between 0.01 mu s/cm and 0.04 mu s/cm, and the grain diameter of liquid drops in the water-in-oil emulsion measured by a laser particle sizer is as follows: d10＝71.34μm、D50＝99.60μm、D90132.43 μm. Generally, when the conductivity is extremely low, it can be determined that oil is a continuous phase and water is a dispersed phase, and thus it can be confirmed that the flying spray preventing liquid prepared by the present invention is a water-in-oil type emulsion.
The invention also provides application of the flying spray-preventing liquid in flying spray-preventing pesticide application of the unmanned aerial vehicle. The amount of the flying spray-proof auxiliary agent is 7.5-30L/ha when the pesticide is applied.
The invention has the following beneficial effects:
(1) the flying spray prevention auxiliary agent consists of vegetable oil, an emulsifier and an auxiliary emulsifier, when spray liquid is prepared, the auxiliary agent is mixed with pesticide and water, wherein the oil and the water form water-in-oil emulsion (turbid) liquid under the action of the emulsifier and the auxiliary emulsifier, active ingredients in a pesticide preparation are uniformly dispersed in an oil phase or a water phase of the oil-based emulsion (turbid) liquid, and water-in-oil fog drops with moderate particle size are formed by spraying through a hydraulic or centrifugal spray head, so that the using amount of the oil in the existing ultra-low volume spraying is reduced, the cost is reduced, and the influence of excessive oil on the formation of leaf spots on the leaf surfaces of crops is also reduced; the fog drops formed after the emulsion in the water-in-oil state is sprayed can effectively enhance the adhesion when moving to the surface of a plant, reduce the bouncing effect of the fog drops, rapidly expand under the action of a surfactant, and remarkably reduce the interference of a wind field generated by a rotor wing of the unmanned aerial vehicle on the sedimentation and adhesion behaviors of the fog drops; meanwhile, the water-in-oil emulsion is formed after the auxiliary agent is added with water, and the specific gravity of the auxiliary agent is improved, so that the sedimentation of fog drops can be accelerated, and the drifting of the fog drops can be reduced.
(2) The preparation process of the auxiliary agent is simple, and the auxiliary agent is convenient to use and operate in the field; does not contain aromatic organic solvent, and is safe to the organisms such as users, livestock and the like; the oil is vegetable oil, is easy to degrade in the environment, and has the advantages of evaporation resistance, drift resistance, easy sedimentation, easy absorption and the like.
(3) The adjuvant provided by the invention belongs to a universal spray adjuvant, forms water-in-oil emulsion (turbid) liquid after being mixed with water, has an oil phase and a water phase, can be well diluted and mixed with most pesticide formulations sold in the market at present, and is suitable for spraying and preventing mist spraying of a hydraulic or centrifugal spray head.
Drawings
FIG. 1 is a graph comparing the size and distribution of droplets on plant foliage after spraying the commercial pesticide suspension in example 1 with a diluent of adjuvant and water; wherein (a) is the size and distribution map of fog drops on plant leaf surfaces after the special auxiliary agent of the invention and a commercially available pesticide suspending agent are diluted and mixed; (b) is the size and distribution map of fog drops on the plant leaf surface after water and a commercial pesticide suspending agent are diluted and mixed.
FIG. 2 is a graph comparing the size and distribution of droplets on the leaf surfaces of plants after spraying the diluted solution of commercial pesticide preparation oil suspending agent with adjuvant and water in example 5; wherein (a) is the size and distribution map of fog drops on plant leaf surfaces after the special auxiliary agent of the invention and a commercial pesticide preparation oil suspending agent are diluted and mixed; (b) is the size and distribution map of fog drops on the plant leaf surface after water and the oil suspending agent of the commercial pesticide preparation are diluted and mixed.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention appear more clearly and intuitively, the present invention is further described in detail below with reference to test data results. The following analysis results are merely illustrative of the present invention and are not intended to limit the present invention.
The mass percentages of the components mentioned in the embodiments of the present invention not only refer to the mass proportion relationship among the components, but also may represent the specific contents of the components. Therefore, the mass units described in the specification may be in the known mathematical mass units of mg, g, kg, etc., as long as the content ratio between the components mentioned in the examples of the present invention is enlarged or reduced within the range disclosed in the specification of the examples of the present invention.
The present invention is further described in detail by selecting some of the pesticide preparations on the market. The selected commercially available pesticides are respectively: 20% chlorantraniliprole suspension (SC, DuPont), 10% cyantraniliprole oil suspension (OD, DuPont), 3% fluroxypyridine ester (EC, Yinong Dow).
Example 1
1. The embodiment provides a special spraying auxiliary agent for an agricultural plant protection unmanned aerial vehicle. The spray assistant consists of the following components: 75.5% of methyl oleate, 2% of organic phosphate, 3.5% of fatty alcohol-polyoxyethylene ether, 8.5% of sorbitan fatty acid ester, 3.5% of polyoxyethylene sorbitan fatty acid ester and 7% of n-butyl alcohol.
The preparation method of the special auxiliary agent comprises the following steps: according to the formula of the spray assistant, methyl oleate, organic phosphate, fatty alcohol-polyoxyethylene ether, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester and n-butyl alcohol are respectively weighed and mixed, and then a shearing homogenizer is adopted to shear for 10 minutes at the speed of 2000 r/min, so that the uniform and transparent special assistant for spray prevention is formed. The mixing ratio of the auxiliary agent to water is 1: 0.667.
2. The preparation method of the spray-proof liquid comprises the following steps:
suspension type spray Solution (SC): weighing 10g of 20% chlorantraniliprole suspending agent and 30g of water, mixing, slowly adding 60g of the special spraying auxiliary agent, and oscillating and mixing to form spraying liquid which can be used for spraying by an unmanned aerial vehicle;
oil suspension type spray liquid (OD): weighing 10g of 10% cyantraniliprole oil suspending agent and 60g of the special spraying auxiliary agent, mixing, slowly adding 40g of water, and oscillating and mixing to form spraying liquid which can be used for spraying of an unmanned aerial vehicle;
emulsifiable solution type spray liquid (EC): after 10g of 3% chlorofluoropyridine ester and 60g of the special spraying auxiliary agent are weighed and mixed, 40g of water is slowly added, and the mixture is oscillated and mixed to form a spray liquid which can be used for spraying of an unmanned aerial vehicle.
3. Performance testing
The spraying special aid provided by this embodiment is diluted 10 times by using various pesticide formulations available on the market to form a water-in-oil emulsion for spraying, and deionized water is used to dilute the same pesticide formulation 10 times as a control, and a water-in-oil blank control and a deionized water blank control are respectively used as reference treatments. The fog drop particle size test is carried out by adopting a HYPRO-015# standard nozzle under the condition of 1.0L/min of flow. The 20min evaporation rate measurement was carried out using a weighing method in a thermostat at a constant temperature of 30 ℃.
The spray solutions were subjected to the parameter measurements listed in table 1 and the performance results are shown in table 1.
TABLE 1
As can be seen from table 1, the performance parameters of the water-in-oil emulsion obtained by diluting and mixing the special adjuvant provided in example 1 with different pesticide formulations listed in table 1 and performing indoor simulated spraying operation by using the same type of hydraulic fan-shaped nozzle are mostly superior to those of the pesticide formulation diluted by using deionized water. The particle size of the pure deionized water droplets is smaller, but the particle size of the droplets is obviously larger than that of a spray auxiliary agent diluent after the pesticide preparation is added, because the spray auxiliary agent contains the emulsifying agent and other auxiliary agents, the physicochemical properties of the pesticide preparation can be more favorably exerted.
The emulsion diluted by the special auxiliary agent is stable in homogeneous phase in a stability test for 1 hour, and all spray solutions have no phenomena of crystallization, flocculation and the like.
In the embodiment 1, the evaporation rate, the surface tension and the contact angle of the special auxiliary agent are all smaller than those of a deionized water diluent control group; the electric conductivity is between 0.01 and 0.04 mu s/cm, and when the electric conductivity is almost 0, the outer layer of the fog drop particles is wrapped by oil, the water is difficult to evaporate, the evaporation rate is low, and the field spraying is facilitated. The spreading distribution of the liquid medicine on the plant leaf surfaces can be effectively promoted by smaller surface tension and contact angle, the pesticide effect can be more effectively exerted, and the purpose of prevention and treatment is achieved.
Further observing the actual spraying experiment results of the water-in-oil emulsion liquid medicine and the deionized water diluted liquid medicine formed by diluting the special auxiliary agent with the water mixed agent provided in the embodiment 1 in the field, the distribution conditions of the fog drops on the plant leaf surfaces after the diluted liquid medicine and the deionized water diluted liquid medicine are actually sprayed in the field can be observed and compared in the figure 1. As shown in fig. 1(a), the water-in-oil emulsion for spraying provided by example 1 is sprayed by flying defense, and then the droplets are uniformly distributed on the rice leaf surface, and the droplets are immediately adsorbed and rapidly spread after contacting the rice leaf surface, and at the same time, the emulsion can effectively help the penetration and absorption of the active ingredients of the drug under the action of methyl oleate, thereby being beneficial to the exertion of the drug effect; as shown in fig. 1(b), after the conventional spray solution diluted with deionized water is sprayed, no spot or droplet on the rice leaf surface is found, and the effect of the droplet on the plant leaf surface is not ideal.
Example 2
1. The embodiment provides a special spraying auxiliary agent for an agricultural plant protection unmanned aerial vehicle. The spray assistant consists of the following components: 77.5% of methyl oleate, 2% of organic phosphate, 3.5% of hydroxy polyethylene oxide block polymer, 10% of sorbitan fatty acid ester, 2% of polyoxyethylene sorbitan fatty acid ester and 5% of n-butyl alcohol.
The preparation method of the special auxiliary agent comprises the following steps: according to the formula of the spray assistant, methyl oleate, organic phosphate, hydroxy polyethylene oxide block polymer, sorbitan fatty acid ester, polyoxyethylene sorbitan fatty acid ester and n-butyl alcohol are respectively weighed and mixed, and then a shearing homogenizer is adopted to shear for 10 minutes at the speed of 2000 r/min, so that the uniform and transparent special assistant for spray prevention is formed. The mixing ratio of the auxiliary agent to water is 1:1.
2. The preparation method of the spray-proof liquid comprises the following steps:
suspension type spray Solution (SC): weighing 10g of 20% chlorantraniliprole suspending agent and 40g of water, mixing, slowly adding 50g of the special spraying auxiliary agent, and oscillating and mixing to form spraying liquid which can be used for spraying by an unmanned aerial vehicle;
oil suspension type spray liquid (OD): weighing 10g of 10% cyantraniliprole oil suspending agent and 50g of the special spraying auxiliary agent, mixing, slowly adding 50g of water, and oscillating and mixing to form spraying liquid which can be used for spraying of an unmanned aerial vehicle;
emulsifiable solution type spray liquid (EC): after 10g of 3% chlorofluoropyridine ester and 50g of the special spraying auxiliary agent are weighed and mixed, 50g of water is slowly added, and the mixture is oscillated and mixed to form a spray liquid which can be used for spraying of an unmanned aerial vehicle.
3. Performance testing
The spraying special aid provided by this embodiment is diluted 10 times by using various pesticide formulations available on the market to form a water-in-oil emulsion for spraying, and deionized water is used to dilute the same pesticide formulation 10 times as a control, and a water-in-oil blank control and a deionized water blank control are respectively used as reference treatments. The fog drop particle size test is carried out by adopting a HYPRO-015# standard fan-shaped nozzle under the condition of 1.0L/min of flow. The 20min evaporation rate measurement was carried out using a weighing method in a thermostat at a constant temperature of 30 ℃.
The spray solutions were subjected to the parameter measurements listed in table 2 and the performance results are shown in table 2.
TABLE 2
As can be seen from table 2, the performance parameters of the water-in-oil emulsion obtained by diluting and mixing the special adjuvant provided in example 2 with different pesticide formulations listed in table 2 and performing indoor simulated spraying operation by using the same type of hydraulic fan-shaped nozzle are mostly superior to those of the pesticide formulation diluted by using deionized water. The particle size of the pure deionized water droplets is smaller, but the particle size of the droplets is obviously larger than that of a spray auxiliary agent diluent after the pesticide preparation is added, because the spray auxiliary agent contains the emulsifying agent and other auxiliary agents, the physicochemical properties of the pesticide preparation can be more favorably exerted. The emulsion diluted by the special auxiliary agent is stable in homogeneous phase in a stability test for 1 hour, and all spray solutions have no phenomena of crystallization, flocculation and the like. In example 2, the evaporation rate, surface tension and contact angle of the special auxiliary agent are all smaller than those of the deionized water diluent control group. The electric conductivity is between 0.01 and 0.04 mu s/cm; the spray liquid conductivity is obviously less than zero when tap water is close to zero, which shows that the outer layer of the fog drop particles is wrapped by oil, the water is difficult to evaporate, the evaporation rate is low, and the field spraying is more facilitated. The spreading distribution of the liquid medicine on the plant leaf surfaces can be effectively promoted by smaller surface tension and contact angle, the pesticide effect can be more effectively exerted, and the purpose of prevention and treatment is achieved.
Example 3
1. The embodiment provides a special auxiliary agent for spraying of an agricultural plant protection unmanned aerial vehicle. The spray assistant consists of the following components: 79% of methyl-esterified soybean oil, 3% of fatty alcohol-polyoxyethylene ether-organic phosphate compound, 9% of sorbitan fatty acid ester, 2.5% of hydroxyl polyoxyethylene block polymer and 6.5% of n-butyl alcohol.
The preparation method of the special auxiliary agent comprises the following steps: according to the formula of the auxiliary agent, methyl esterified soybean oil, a fatty alcohol-polyoxyethylene ether-organic phosphate compound, sorbitan fatty acid ester, a hydroxy polyethylene oxide block polymer and n-butyl alcohol are respectively weighed and sheared by a shearing homogenizer at the speed of 2000 revolutions per minute for 10 minutes to form the uniform and transparent auxiliary agent special for preventing spraying. The mixing ratio of the auxiliary agent to water is 1: 0.667.
2. The preparation method of the spray-proof liquid comprises the following steps:
suspension type spray Solution (SC): weighing 10g of 20% chlorantraniliprole suspending agent and 30g of water, mixing, slowly adding 60g of the special spraying auxiliary agent, and oscillating and mixing to form spraying liquid which can be used for spraying by an unmanned aerial vehicle;
oil suspension type spray liquid (OD): weighing 10g of 10% cyantraniliprole oil suspending agent and 60g of the special spraying auxiliary agent, mixing, slowly adding 40g of water, and oscillating and mixing to form spraying liquid which can be used for spraying of an unmanned aerial vehicle;
emulsifiable solution type spray liquid (EC): weighing 10g of 3% chlorofluoropyridine ester and 60g of the special spraying auxiliary agent, mixing, slowly adding 40g of water, and oscillating and mixing to form a spray solution which can be used for spraying by an unmanned aerial vehicle;
3. performance testing
The spraying special aid provided by this embodiment is diluted 10 times by using various pesticide formulations available on the market to form a water-in-oil emulsion for spraying, and deionized water is used to dilute the same pesticide formulation 10 times as a control, and a water-in-oil blank control and a deionized water blank control are respectively used as reference treatments. The fog drop particle size test is carried out by adopting a HYPRO-015# standard fan-shaped nozzle under the condition of 1.0L/min of flow. The 20min evaporation rate measurement was carried out using a weighing method in a thermostat at a constant temperature of 30 ℃.
The spray solutions were subjected to the parameter measurements listed in table 3 and the performance results are shown in table 3.
TABLE 3
As can be seen from table 3, the performance parameters of the water-in-oil emulsion obtained by diluting and mixing the special additive provided in example 3 with different pesticide formulations listed in table 3 and performing indoor simulated spraying operation by using the same type of hydraulic fan-shaped nozzle are mostly superior to those of the pesticide formulation diluted with deionized water. The particle size of the pure deionized water droplets is smaller, but the particle size of the droplets is obviously larger than that of a spray auxiliary agent diluent after the pesticide preparation is added, because the spray auxiliary agent contains the emulsifying agent and other auxiliary agents, the physicochemical properties of the pesticide preparation can be more favorably exerted. The emulsion diluted by the special auxiliary agent is stable in homogeneous phase in a stability test for 1 hour, and all spray solutions have no phenomena of crystallization, flocculation and the like.
In this example, the evaporation rate, surface tension, and contact angle of the spray aid were all less than those of the deionized water diluent control. The electric conductivity is between 0.02 and 0.05 mu s/cm; when the spray liquid conductivity is obviously smaller than that of tap water, the outer layer of the fog drop particles is wrapped by oil, the water is difficult to evaporate, the evaporation rate is low, and the field spraying is more facilitated. The spreading distribution of the liquid medicine on the plant leaf surfaces can be effectively promoted by smaller surface tension and contact angle, the pesticide effect can be more effectively exerted, and the purpose of prevention and treatment is achieved.
Example 4
1. The embodiment provides a special spraying auxiliary agent for an agricultural plant protection unmanned aerial vehicle. The spray assistant consists of the following components: 77% of soybean oil, 8.5% of sorbitan fatty acid ester, 3.5% of fatty alcohol-polyoxyethylene ether, 5% of propylene glycol block polyether and 6% of n-butyl alcohol.
The preparation method of the special auxiliary agent comprises the following steps: according to the formula of the spray assistant, soybean oil, sorbitan fatty acid ester, fatty alcohol-polyoxyethylene ether, propylene glycol block polyether and n-butyl alcohol are respectively weighed and mixed, and then a shearing homogenizer is adopted to shear for 10 minutes at the speed of 2000 r/min, so that the uniform and transparent special assistant for spray prevention is formed. The mixing ratio of the auxiliary agent to water is 1: 0.5.
2. The preparation method of the spray-proof liquid comprises the following steps:
suspension type spray Solution (SC): weighing 10g of 20% chlorantraniliprole suspending agent and 23g of water, mixing, slowly adding 67g of the special spraying auxiliary agent, and oscillating and mixing to form spraying liquid for spraying of the unmanned aerial vehicle;
oil suspension type spray liquid (OD): weighing 10g of 10% cyantraniliprole oil suspending agent and 67g of the special spraying auxiliary agent, mixing, slowly adding 33g of water, and oscillating and mixing to form spraying liquid which can be used for spraying of an unmanned aerial vehicle;
emulsifiable solution type spray liquid (EC): weighing 10g of 3% chlorofluoropyridine ester and 67g of the special spraying auxiliary agent, mixing, slowly adding 33g of water, and oscillating and mixing to form a spray solution which can be used for spraying by an unmanned aerial vehicle;
3. performance testing
The spraying special aid provided by this embodiment is diluted 10 times by using various pesticide formulations available on the market to form a water-in-oil emulsion for spraying, and deionized water is used to dilute the same pesticide formulation 10 times as a control, and a water-in-oil blank control and a deionized water blank control are respectively used as reference treatments. The fog drop particle size test is carried out by adopting a HYPRO-015# standard fan-shaped nozzle under the condition of 1.0L/min of flow. The 20min evaporation rate measurement was carried out using a weighing method in a thermostat at a constant temperature of 30 ℃.
The spray solutions were subjected to the parameter measurements listed in table 4 and the performance results are shown in table 4.
TABLE 4
As can be seen from table 4, the performance parameters of the water-in-oil emulsion obtained by diluting and mixing the special additive provided in example 4 with different pesticide formulations listed in table 4 and performing indoor simulated spraying operation by using the same type of hydraulic fan-shaped nozzle are mostly superior to those of the pesticide formulation diluted with deionized water.
The particle size of the pure deionized water droplets is smaller, but the particle size of the droplets is obviously larger than that of a spray auxiliary agent diluent after the pesticide preparation is added, because the spray auxiliary agent contains the emulsifying agent and other auxiliary agents, the physicochemical properties of the pesticide preparation can be more favorably exerted. The emulsion diluted by the special auxiliary agent is stable in homogeneous phase in a stability test for 1 hour, and all spray solutions have no phenomena of crystallization, flocculation and the like.
In this example, the evaporation rate, surface tension, and contact angle of the spray aid were all less than those of the deionized water diluent control. The conductivity is between 9.81 and 12.63 mu s/cm, and the generated low-value conductivity is caused by part of conductive ions generated in the processing process of the soybean oil; when the conductivity of the spray liquid is obviously less than that of deionized water, the outer layer of the fog drop particles is wrapped by oil, the water is difficult to evaporate, the evaporation rate is low, and the field spraying is facilitated; the spreading distribution of the liquid medicine on the plant leaf surfaces can be effectively promoted by smaller surface tension and contact angle, the pesticide effect can be more effectively exerted, and the purpose of prevention and treatment is achieved.
Example 5
1. The embodiment provides a special auxiliary agent for spraying of an agricultural plant protection unmanned aerial vehicle. The spray assistant consists of the following components: 76% of methyl esterified soybean oil, 3.5% of fatty alcohol polyoxyethylene ether-organic phosphate composite emulsifier, 8.5% of sorbitan fatty acid ester, 1.5% of hydroxyl polyethylene oxide block polymer, 3.5% of propylene glycol block polyether and 7% of n-butyl alcohol.
The preparation method of the special auxiliary agent comprises the following steps: according to the formula of the auxiliary agent, methyl-esterified soybean oil, fatty alcohol-polyoxyethylene ether organic phosphate, sorbitan fatty acid ester, hydroxyl polyethylene oxide block polymer, propylene glycol block polyether and n-butyl alcohol are respectively weighed and sheared for 10 minutes at the speed of 2000 revolutions per minute by a shearing homogenizer to form the uniform and transparent auxiliary agent special for preventing spraying. The mixing ratio of the auxiliary agent to water is 1: 1.25.
2. The preparation method of the spray-proof liquid comprises the following steps:
SC: weighing 10g of 20% chlorantraniliprole suspending agent and 50g of water, mixing, slowly adding 60g of the special spraying auxiliary agent, and oscillating and mixing to form spraying liquid which can be used for spraying by an unmanned aerial vehicle;
OD: weighing 10g of 10% cyantraniliprole oil suspending agent and 40g of the special spraying auxiliary agent, mixing, slowly adding 60g of water, and oscillating and mixing to form spraying liquid which can be used for spraying of an unmanned aerial vehicle;
EC: weighing 10g of 3% chlorofluoropyridine ester and 40g of the special spraying auxiliary agent, mixing, slowly adding 60g of water, and oscillating and mixing to form a spray solution which can be used for spraying by an unmanned aerial vehicle;
3. performance testing
In this example 5, the special adjuvant is diluted 10 times by using a plurality of pesticide formulations available on the market to form a spray solution, and the same pesticide formulation is diluted 10 times by using deionized water as a control, and a water-in-oil blank control and a deionized water blank control are respectively used as reference treatments. The fog drop particle size test is carried out by adopting a HYPRO-015# standard nozzle under the condition of 1.0L/min of flow. The 20min evaporation rate measurement was carried out using a weighing method in a thermostat at a constant temperature of 30 ℃.
The spray solutions were subjected to the parameter measurements listed in table 5 and the performance results are shown in table 5.
TABLE 5
As can be seen from table 5, the spraying special aid provided in this example 5 and different pesticide formulations listed in table 5 were diluted, mixed and sprayed, and the same type of hydraulic fan-shaped nozzle was used for indoor simulated spraying, so that the performance parameters of the obtained spray were mostly better than those of the pesticide formulations diluted with deionized water.
The particle size of the pure deionized water droplets is smaller, but the particle size of the droplets is obviously larger than that of a spray auxiliary agent diluent after the pesticide preparation is added, because the spray auxiliary agent contains the emulsifying agent and other auxiliary agents, the physicochemical properties of the pesticide preparation can be more favorably exerted. The emulsion diluted by the special auxiliary agent is stable in homogeneous phase in a stability test for 1 hour, and all spray solutions have no phenomena of crystallization, flocculation and the like.
In this example, the evaporation rate, surface tension, and contact angle of the spray aid were all less than those of the deionized water diluent control. The electric conductivity is between 0.02 and 0.04 mu s/cm; when the spray liquid conductivity is obviously smaller than that of tap water, the outer layer of the fog drop particles is wrapped by oil, the water is difficult to evaporate, the evaporation rate is low, and the field spraying is more facilitated. The spreading distribution of the liquid medicine on the plant leaf surfaces can be effectively promoted by smaller surface tension and contact angle, the pesticide effect can be more effectively exerted, and the purpose of prevention and treatment is achieved.
Further observing the actual spraying experiment results of the spray solution diluted by the special auxiliary agent and the deionized water diluted spray solution provided by the embodiment 5 in the field, the distribution conditions of the plant leaf surface fog drops after the spray dilution solution and the deionized water diluted spray solution are actually sprayed in the field can be observed and compared in fig. 2. As shown in fig. 2(a), the spray diluent provided in example 5 is sprayed with a flying spray, and then the droplets are uniformly distributed on the rice leaf surface, and the droplets are immediately adsorbed and rapidly spread after contacting the rice leaf surface, and at the same time, the spray diluent can effectively help the penetration and absorption of the effective components of the drug under the action of methyl esterified soybean oil, thereby facilitating the drug effect; as shown in fig. 2(b), after the conventional spray solution diluted with deionized water is sprayed, no spot or droplet on the rice leaf surface is found, and the effect of the droplet on the plant leaf surface is not ideal.
The assistant has the advantages of water retention, evaporation resistance, high flash point, high adhesion, easy sedimentation, safe use and the like, the formed water-in-oil emulsion contains oil and water, the adaptability to pesticide preparations is wide in the using process, the pesticide preparations with dispersed oil or dispersed water can be effectively diluted and mixed, and the assistant is suitable for the spraying prevention operation of the unmanned aerial vehicle for plant protection.
The above description is only a partial example of the present invention and should not be construed as limiting the present invention, and any modification, replacement, improvement, etc. within the scope of the present invention as set forth in the appended claims are included in the protection scope of the present invention.
Claims (7)
1. A preparation method of a flying spray preventing liquid is characterized by comprising the following steps:
premixing an oil-based formulation or dry preparation pesticide and a flying spray prevention auxiliary agent, and adding water for oscillation mixing to prepare a flying spray prevention liquid;
after premixing the water-based pesticide and water, adding the flying spray prevention auxiliary agent, and oscillating and mixing to prepare a flying spray prevention liquid;
the mixing volume ratio of the flying spray-preventing assistant to the water phase is 1: 0.1-1.0;
the flying spray-preventing auxiliary agent comprises the following components in percentage by mass: 70-94% of vegetable oil, 5-20% of emulsifier and 1-10% of co-emulsifier;
the vegetable oil is one or a compound combination of methyl oleate, methyl esterified soybean oil, soybean oil and methyl laureate;
the emulsifier is one or a compound combination of fatty alcohol polyoxyethylene ether, fatty alcohol polyoxyethylene ether-organic phosphate ester composite emulsifier, polyoxyethylene sorbitan fatty acid ester, organic phosphate ester, sorbitan fatty acid ester, castor oil polyoxyethylene ether, alkylphenol alkoxylate, alkyl glycoside, hydroxyl polyethylene oxide block polymer and propylene glycol block polyether;
the auxiliary emulsifier is one or more of polyethylene glycol, ethanol, isopropanol, n-butanol and isobutanol.
2. The method for preparing the flying spray preventing liquid according to claim 1, wherein the flying spray preventing auxiliary agent comprises the following components in percentage by mass: 70-85% of vegetable oil, 10-20% of emulsifier and 3-10% of co-emulsifier;
the vegetable oil is one or a compound combination of methyl oleate, methyl esterified soybean oil and soybean oil;
the emulsifier is one or a compound combination of fatty alcohol-polyoxyethylene ether, a fatty alcohol-polyoxyethylene ether-organic phosphate compound, polyoxyethylene sorbitan fatty acid ester, organic phosphate, sorbitan fatty acid ester, castor oil polyoxyethylene ether, an alkylphenol alkoxy compound, a hydroxyl polyethylene oxide block polymer and propylene glycol block polyether;
the coemulsifier is one or the combination of isopropanol, normal butanol and isobutanol.
3. The method for preparing the flying spray preventing liquid according to claim 2, wherein the flying spray preventing auxiliary agent comprises the following components in percentage by mass: 70-80% of vegetable oil, 10-20% of emulsifier and 5-10% of co-emulsifier;
the vegetable oil is one or a compound combination of methyl oleate and methyl esterified soybean oil;
the emulsifier is one or a compound combination of fatty alcohol-polyoxyethylene ether, a fatty alcohol-polyoxyethylene ether-organic phosphate compound, polyoxyethylene sorbitan fatty acid ester, organic phosphate, sorbitan fatty acid ester, castor oil polyoxyethylene ether, hydroxyl polyethylene oxide block polymer and propylene glycol block polyether;
the co-emulsifier is one or a compound combination of n-butyl alcohol and isobutyl alcohol.
4. The method of preparing the flying spray prevention fluid of claim 1, wherein the method of preparing the flying spray prevention aid comprises: and mixing the emulsifier and the co-emulsifier, adding the mixture into vegetable oil, stirring and dissolving, and shearing the mixture for 5 to 20 minutes by a homogenizer at 2000-3000 r/min to form uniform and stable oil-based liquid, thus obtaining the flying spray prevention assistant.
5. The method of making a flying spray formulation of claim 1, wherein the oil-based formulation comprises an oil suspension, a cream, an ultra-low volume spray oil; the water-based dosage form comprises an aqueous emulsion, a microemulsion, an aqueous suspension agent, a soluble liquid agent, a liquid agent or an aqueous solution agent; the dry preparation comprises water dispersible granules and wettable powder.
6. A fly spray fluid prepared by the method of any one of claims 1 to 5.
7. Use of the flying spray prevention fluid of claim 6 in unmanned aerial vehicle flying spray prevention applications.
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| CN113180039A (en) * | 2021-05-06 | 2021-07-30 | 苏州嘉佑生物科技有限公司 | Special auxiliary agent for unmanned aerial vehicle plant protection and flying prevention and preparation method and application thereof |
| CN113545342A (en) * | 2021-08-09 | 2021-10-26 | 南京科翼新材料有限公司 | Efficient auxiliary agent suitable for 25% pymetrozine-containing pesticide suspending agent |
| CN113959267B (en) * | 2021-09-30 | 2023-08-01 | 国研软件股份有限公司 | Mist wall spray for disturbing small aircraft, using equipment and using method |
| CN115191430B (en) * | 2022-06-02 | 2023-07-07 | 中国科学院化学研究所 | Application of biomass-based surfactant system as auxiliary agent in improving effective utilization rate of pesticide |
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| DE2730205A1 (en) * | 1976-07-14 | 1978-01-19 | Sandoz Ag | INSECTICIDAL ADDITIVE COMPOSITION |
| CN100418418C (en) * | 2005-06-24 | 2008-09-17 | 福建省泉州德盛农药有限公司 | Pesticide auxiliary agent |
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