Special flocculent precipitation prevention spray additive for flight defense as well as preparation method and application of special flocculent precipitation prevention spray additive

Abstract

The invention relates to a special flocculent precipitation prevention spray additive for flight control as well as a preparation method and application thereof, and belongs to the technical field of flight control additives. The special flocculent precipitation prevention spray additive for flight defense is prepared from the following raw materials according to the following method: weighing the raw materials, and stirring and mixing isomeric alcohol polyoxyethylene ether, isooctanol polyoxyethylene ether and propylene glycol butyl ether at a constant speed of 30-80 revolutions per minute; dropwise adding EDTA-2Na (Ethylene Diamine Tetraacetic Acid), polycarboxylate and water, and carrying out conjugation reaction together; and finally, adding polyoxyethylene polyoxypropylene ether, uniformly stirring, and standing for more than 1 hour to obtain the flocculent precipitation prevention spray additive. The invention further discloses application of the special flocculent precipitation prevention spray additive for flight prevention in preparation of a flight prevention solution. The invention has the following advantages: the mixing compatibility of the pesticide and the fertilizer is increased; the emulsifying agent has emulsifying optimization performance on a suspending agent, and demulsification flocculation and precipitation are prevented; the adhesion performance is enhanced, the adhesion, wetting and permeation of the pesticide liquid on a target are improved, droplet bounce is reduced, the pesticide liquid deposition amount is increased, and the pesticide effect is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of aerial spraying adjuvants, and specifically relates to an anti-flocculation and precipitation spray adjuvant special for aerial spraying, and a preparation method and application thereof. Background Art

[0002] As a new type of plant protection operation in my country, aerial pesticide application by plant protection drones (referred to as aerial spraying) is highly efficient and can effectively solve the problems of difficult manual and ground mechanical operation in tall crops, paddy fields and hilly and mountainous areas compared with traditional manual and ground mechanical spraying methods. It is an effective way to alleviate the shortage of rural labor, deal with large-scale sudden pests and diseases, and reduce the harm of pesticides to operators. As of mid-November 2024, according to preliminary statistics from 26 provinces, my country has more than 200,000 plant protection drones, with a total operating area of ​​more than 2 billion mu, a rapid growth. In actual aerial spraying operations, professional technicians of aerial spraying services often mix a variety of pesticide preparations or foliar fertilizers together for application, which can not only reduce the number of drug applications, reduce the loss of drones, significantly reduce agricultural production costs, but also improve the prevention effect.

[0003] The liquid medicine used for aerial spraying generally consists of multiple components, including insecticides, fungicides, plant growth regulators, miticides, nematicides, fertilizers, etc. The multiple components are mixed and sprayed together. At present, there is no registration of pesticide formulations specifically for aerial spraying in my country. The amount of pesticide formulations used in aerial spraying mainly refers to the amount used for registered crops, but the amount used for registered crops and the amount of water used are all referenced to the conventional spraying mode (backpack spraying technology). Aerial spraying (aerial plant protection technology) adopts a low-volume spraying mode, and the amount of liquid medicine used per mu is only 1.0-2.0L, and the dilution multiple is as low as 30-50 times (conventional spraying requires dilution 2000-3000 times). This high-concentration, multi-component composite liquid system (referred to as aerial spray liquid) is very prone to stability problems such as flocculation and precipitation when mixed with pesticides or fertilizers. The main reasons can be summarized as follows: 1. High concentration environment intensifies molecular interactions Conventional spraying reduces the concentration of pesticides by high dilution, but the aerial spraying liquid has a very low dilution ratio, which leads to a significant increase in the concentration of active ingredients after mixing. At ultra-high concentrations, the spatial repulsion between pesticide molecules is greatly weakened, and particles and oil droplets are more likely to agglomerate due to van der Waals forces, causing system instability.

[0004] 2. Charge conflict triggers flocculation reaction Different pesticide technicals have different surface charge properties: for example, some are positively charged (such as cationic adjuvant formulations), while others are negatively charged (such as anionic formulations). When two pesticides with opposite charge properties are mixed, the positive and negative charges attract each other and neutralize each other, destroying the colloid stability and directly leading to flocculation or precipitation.

[0005] 3. High salt environment interferes with charge balance The high-salt environment in foliar fertilizer contains a large number of charged ions (such as potassium, magnesium, phosphate, etc.), which will compress the double electric layer on the surface of pesticide molecules and weaken the electrostatic repulsion. Under the shielding effect of salt ions, the suspension rate of the suspension is significantly reduced, the oil-water interfacial tension of the emulsion is unbalanced, and finally the emulsion is broken, resulting in flocculation, precipitation and stratification.

[0006] 4. Mutual exclusivity of dosage form additives causes phase separation Different pesticide formulations (such as wettable powders, suspensions, emulsifiable concentrates) need to be matched with adjuvants of specific properties (such as anionic dispersants or cationic emulsifiers). When mixing multiple types of adjuvants, their physical and chemical properties may be mutually exclusive: for example, after anionic adjuvants and cationic adjuvants are combined, they will form insoluble complexes through charge neutralization, resulting in flocculation and precipitation in the system.

[0007] The stability of the aerial spraying liquid system is directly related to the pesticide application efficiency of plant protection drones and agricultural production safety. The cumulative effect of problems in the liquid system can easily lead to uneven dispersion of pesticides, causing nozzle blockage, fluctuations in the concentration of pesticides (local pesticide damage or failure of control), and even excessive pesticide residues in agricultural products. The content of the present invention can optimize the compatibility of pesticides and help establish a stable liquid system, thereby improving the reliability and accuracy of low-volume spraying technology, reducing pesticide waste, reducing the risk of crop pesticide damage, and ensuring the quality and safety of agricultural products. Summary of the invention

[0008] In view of the deficiencies in the prior art, the present invention provides a technical solution for the preparation and application of an anti-flocculation and precipitation spray adjuvant specially used for aerial spraying of plant protection by unmanned aircraft, which can stably suspend different substances in the aerial spray liquid system within 8 hours after mixing these substances, so that they do not settle and flocculate in the mixed system, thereby improving the stability of the aerial spray mixed liquid system and thus improving the utilization rate of pesticides.

[0009] The first purpose of the present invention is to disclose a special anti-flocculation and precipitation spraying auxiliary agent for aerial defense.

[0010] The second purpose of the present invention is to disclose a method for preparing the above-mentioned special anti-flocculation and precipitation spray auxiliary agent for aerial defense.

[0011] The third object of the present invention is to disclose the application of the above-mentioned special anti-flocculation and precipitation spray auxiliary agent for aerial defense.

[0012] The objective of the present invention is achieved through the following technical solutions: A special anti-flocculation and precipitation spraying aid for aerial defense, wherein the special anti-flocculation and precipitation spraying aid is composed of the following raw materials in percentage by mass: 5%-12% of isomeric alcohol polyoxyethylene ether, 10%-20% of isooctyl alcohol polyoxyethylene ether, 15%-30% of polycarboxylate, 10%-20% of propylene glycol butyl ether, 5%-15% of EDTA-2Na, 5%-18% of polyoxyethylene polyoxypropylene ether and 10%-30% of water.

[0013] The special anti-flocculation and precipitation spray aid for aerial defense described in the above technical scheme is composed of the following raw materials in percentage by mass: 8% of isomeric alcohol polyoxyethylene ether, 15% of isooctyl alcohol polyoxyethylene ether, 25% of polycarboxylate, 15% of propylene glycol butyl ether, 10% of EDTA-2Na, 10% of polyoxyethylene polyoxypropylene ether and 17% of water.

[0014] The special anti-flocculation and precipitation spray aid for aerial defense described in the above technical scheme is composed of the following raw materials in percentage by mass: 12% of isomeric alcohol polyoxyethylene ether, 10% of isooctyl alcohol polyoxyethylene ether, 20% of polycarboxylate, 15% of propylene glycol butyl ether, 8% of EDTA-2Na, 15% of polyoxyethylene polyoxypropylene ether and 20% of water.

[0015] The special anti-flocculation and precipitation spray aid for aerial defense described in the above technical scheme is composed of the following raw materials in percentage by mass: 10% of isomeric alcohol polyoxyethylene ether, 12% of isooctyl alcohol polyoxyethylene ether, 28% of polycarboxylate, 15% of propylene glycol butyl ether, 5% of EDTA-2Na, 8% of polyoxyethylene polyoxypropylene ether and 22% of water.

[0016] The preparation method of a special anti-flocculation and precipitation spraying auxiliary agent for aerial defense comprises the following steps: weighing each raw material according to the mass percentage of each raw material in the above technical scheme; uniformly stirring and mixing isomeric alcohol polyoxyethylene ether, isooctyl alcohol polyoxyethylene ether and propylene glycol butyl ether at a speed of 30-80 rpm; then dripping EDTA-2Na, polycarboxylate and water, and causing a conjugation reaction together at 30-50 DEG C; finally adding polyoxyethylene polyoxypropylene ether and stirring evenly, and standing for more than 1 hour to obtain the special anti-flocculation and precipitation spraying auxiliary agent for aerial defense.

[0017] The application of the special anti-flocculation and precipitation spray auxiliary agent for aerial spraying described in the above technical scheme in the preparation of aerial spraying solution.

[0018] The present invention has the following beneficial effects: 1. It can increase the mixing compatibility of medicine and fertilizer, and is suitable for solving the suspension stability problem of foliar fertilizer barrel mixed liquid containing trace elements, potassium dihydrogen phosphate, potassium phosphite, etc. 2. It has emulsification optimization performance for suspension agents, and is suitable for the emulsification stability of the mixed pesticide solution of insecticides and fungicides to prevent demulsification, flocculation and precipitation; 3. Enhance the adhesion performance, increase the adhesion, wetting and penetration of the drug solution on the target, reduce the bounce of droplets, increase the deposition of the drug solution, and improve the efficacy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a flow chart for the preparation of anti-flocculation and precipitation spray additives specifically for aerial defense.

[0020] Figure 2 The control effect of rice stem borer after low-volume spraying by plant protection drones.

[0021] Figure 3 The control effect of rice leaf folder after low-volume spraying by plant protection drones. DETAILED DESCRIPTION

[0022] To facilitate the understanding of the technical solution of the present invention, the following further describes the anti-flocculation and precipitation spraying auxiliary agent for aerial defense and its preparation method and application in combination with specific embodiments.

[0023] Example 1: A special anti-flocculation precipitation spray adjuvant for aerial defense: The preparation flow chart of anti-flocculation precipitation spray additive for aerial defense is as follows: Figure 1 shown.

[0024] 1. Weigh the components: 80 g of isomeric alcohol polyoxyethylene ether, 150 g of isooctyl alcohol polyoxyethylene ether, 250 g of polycarboxylate, 150 g of propylene glycol butyl ether, 100 g of EDTA-2Na, 100 g of polyoxyethylene polyoxypropylene ether and 170 g of water.

[0025] 2. Mix isomeric alcohol polyoxyethylene ether, isooctyl alcohol polyoxyethylene ether and propylene glycol butyl ether at a uniform stirring speed of 30-80 rpm; then add EDTA-2Na, polycarboxylate and water dropwise to cause conjugation reaction at 30-50°C; finally add polyoxyethylene polyoxypropylene ether and stir evenly, let stand for more than 1 hour to obtain a special anti-flocculation precipitation spray aid for aerial defense.

[0026] Example 2: A special anti-flocculation precipitation spray adjuvant for aerial defense: This embodiment is the same as embodiment 1, except that the content of each raw material is: Weigh the components: 120 g of isomeric alcohol polyoxyethylene ether, 100 g of isooctyl alcohol polyoxyethylene ether, 200 g of polycarboxylate, 150 g of propylene glycol butyl ether, 80 g of EDTA-2Na, 150 g of polyoxyethylene polyoxypropylene ether and 200 g of water.

[0027] Example 3: A special anti-flocculation precipitation spray adjuvant for aerial defense: This embodiment is the same as embodiment 1, except that the content of each raw material is: Weigh the components: 100 g of isomeric alcohol polyoxyethylene ether, 120 g of isooctyl alcohol polyoxyethylene ether, 280 g of polycarboxylate, 150 g of propylene glycol butyl ether, 50 g of EDTA-2Na, 80 g of polyoxyethylene polyoxypropylene ether and 220 g of water.

[0028] In order to verify the practical performance of the anti-flocculation and precipitation spray adjuvant for aerial spraying of the present invention, the present application designed 4 groups of pesticide-foliar fertilizer compound solution systems containing the adjuvant for performance evaluation. They are as follows: (1) A spraying solution system consisting of 5% avermectin suspension, 25% pyraclostrobin suspension, Eumet trace element foliar fertilizer and water; (2) A spraying solution system consisting of 5% avermectin emulsifiable concentrate, 70% pymetrozine•dinotefuran wettable powder, potassium phosphite foliar fertilizer and water; (3) A spraying solution system consisting of 25% pymetrozine suspension, 5% abamectin emulsifiable concentrate, 10% abamectin·chlorfenapyr suspension, 25% pyraclostrobin suspension, potassium phosphite trace element foliar fertilizer and water; (4) A spraying solution system consisting of 25% etoxazole suspension, 43% bifenazate suspension, 40% fenpropimorph SC, 0.004% brassinolide aqueous solution, potassium phosphite foliar fertilizer and water.

[0029] These four combined aerial spraying solution systems not only have outstanding effects in terms of the stability of the solution, but also perform very well in terms of pest control. The following will describe them in detail with reference to specific experimental examples.

[0030] In order to obtain the best stability of the multi-component mixed aerial spray solution system, the general order of preparing the aerial spray solution is as follows: water - aerial spray special anti-flocculation precipitation spray adjuvant - pesticide - foliar fertilizer; after adding each agent, stir and mix immediately, and then add the next substance. After all substances are added, the aerial spray solution system is obtained. In the following embodiment, the weight of the aerial spray solution system is 2.0 kg of liquid medicine (about 2L), and the aerial spray solution system is numbered 1-16.

[0031] The anti-flocculation and precipitation spray adjuvant developed by this application is experimentally verified to be compatible with mixed application scenarios of various formulations of pesticides and water-soluble fertilizers. Its components are not limited to the types listed in the embodiment. Other brands or types of similar ingredients can also achieve the same effect after compatibility verification, and have good technical scalability.

[0032] The following is an example of a specific experiment to illustrate the effect of the present invention: Experimental Example 1: Plant protection drone spraying to control rice stem borer, sheath blight, and rice false smut: The aerial spraying solution system for plant protection drone spraying is 1: 0 grams of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 80 grams of isomeric alcohol polyoxyethylene ether, 150 grams of isooctyl alcohol polyoxyethylene ether, 250 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 100 grams of EDTA-2Na, 100 grams of polyoxyethylene polyoxypropylene ether and 170 grams of water), 120 grams of 5% avermectin suspension, 80 grams of 25% pyraclostrobin suspension, 100 grams of Umet trace element foliar fertilizer, and water is supplemented.

[0033] Aerial spraying solution system 2 for spraying pesticides by unmanned aerial vehicles for plant protection: 10 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 80 grams of isomeric alcohol polyoxyethylene ether, 150 grams of isooctyl alcohol polyoxyethylene ether, 250 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 100 grams of EDTA-2Na, 100 grams of polyoxyethylene polyoxypropylene ether and 170 grams of water), 120 grams of 5% avermectin suspension, 80 grams of 25% pyraclostrobin suspension, 100 grams of Umet trace element foliar fertilizer, and make up for the water.

[0034] Aerial spraying solution system 3 for plant protection drone spraying: 20 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 80 grams of isomeric alcohol polyoxyethylene ether, 150 grams of isooctyl alcohol polyoxyethylene ether, 250 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 100 grams of EDTA-2Na, 100 grams of polyoxyethylene polyoxypropylene ether and 170 grams of water), 120 grams of 5% avermectin suspension, 80 grams of 25% pyraclostrobin suspension, 100 grams of Umet trace element foliar fertilizer, and make up for the water.

[0035] Aerial spraying solution system 4 for plant protection drone spraying: 30 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 80 grams of isomeric alcohol polyoxyethylene ether, 150 grams of isooctyl alcohol polyoxyethylene ether, 250 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 100 grams of EDTA-2Na, 100 grams of polyoxyethylene polyoxypropylene ether and 170 grams of water), 120 grams of 5% avermectin suspension, 80 grams of 25% pyraclostrobin suspension, 100 grams of Umet trace element foliar fertilizer, and make up for the water.

[0036] The performance of the aerial spraying solution system 1-4 was tested, and the results are shown in Table 1. As the amount of the special anti-flocculation and precipitation spraying adjuvant for aerial spraying gradually increased from 0% to 30%, the surface tension of the system was significantly reduced from 58.2 mN / m to 26.9 mN / m (a decrease of 53.8%), and the droplet size was reduced from 185 μm to 180 μm (a decrease of 2.7%). This change is consistent with the physical mechanism of "reduced surface tension → improved droplet breakup efficiency → reduced particle size": reduced surface tension weakens the cohesion of droplets, making them easier to break under the action of external atomization forces (such as centrifugal force). Studies have shown that when the adjuvant dosage is 20%, the surface tension can be reduced to 28.7 mN / m, corresponding to a droplet size of 195 μm, taking into account both atomization efficiency and stability.

[0037] Table 1 Liquid state and spray droplet size of aerial spray solution system 1-4

[0038] Experimental Example 2: Plant protection drone spraying to control rice stem borer, rice borer and rice planthopper: Aerial spraying solution system 5 for plant protection drone spraying: 0 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 120 g of isomeric alcohol polyoxyethylene ether, 100 g of isooctyl alcohol polyoxyethylene ether, 200 g of polycarboxylate, 150 g of propylene glycol butyl ether, 80 g of EDTA-2Na, 150 g of polyoxyethylene polyoxypropylene ether and 200 g of water), 120 ml of 5% avermectin suspension, 80 ml of 70%% pymetrozine•dinotefuran wettable powder, 200 g of potassium phosphite foliar fertilizer, and make up with water.

[0039] Aerial spraying solution system for plant protection drone spraying 6: 10 grams of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 120 grams of isomeric alcohol polyoxyethylene ether, 100 grams of isooctyl alcohol polyoxyethylene ether, 200 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 80 grams of EDTA-2Na, 150 grams of polyoxyethylene polyoxypropylene ether and 200 grams of water), 120 milliliters of 5% avermectin suspension, 80 milliliters of 70% pymetrozine•dinotefuran wettable powder, 200 grams of potassium phosphite foliar fertilizer, and make up for the water.

[0040] Aerial spraying solution system 7 for plant protection drone spraying: 20 grams of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 120 grams of isomeric alcohol polyoxyethylene ether, 100 grams of isooctyl alcohol polyoxyethylene ether, 200 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 80 grams of EDTA-2Na, 150 grams of polyoxyethylene polyoxypropylene ether and 200 grams of water), 120 milliliters of 5% avermectin suspension, 80 milliliters of 70% pymetrozine•dinotefuran wettable powder, 200 grams of potassium phosphite foliar fertilizer, and make up for the water.

[0041] Aerial spraying solution system for plant protection drone spraying 8: 30 grams of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 120 grams of isomeric alcohol polyoxyethylene ether, 100 grams of isooctyl alcohol polyoxyethylene ether, 200 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 80 grams of EDTA-2Na, 150 grams of polyoxyethylene polyoxypropylene ether and 200 grams of water), 120 milliliters of 5% avermectin suspension, 80 milliliters of 70% pymetrozine•dinotefuran wettable powder, 200 grams of potassium phosphite foliar fertilizer, and make up for the water.

[0042] The performance of the aerial spraying solution system 5-8 was tested, and the results are shown in Table 2. When the amount of the special anti-flocculation and precipitation spraying auxiliary agent for aerial spraying is ≥20 g, the system is stable, the surface tension is ≤35 mN / m, the droplet size is ≤150 microns, and the efficiency is increased and the drift is reduced.

[0043] Table 2 Liquid state and median particle size of flying spray solution system 5-8

[0044] Experimental Example 3: Plant protection drone spraying to control rice stem borer, rice borer, rice planthopper, sheath blight and rice false smut: Aerial spraying solution system for plant protection drone spraying 9: 0 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 100 grams of isomeric alcohol polyoxyethylene ether, 120 grams of isooctyl alcohol polyoxyethylene ether, 280 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 50 grams of EDTA-2Na, 80 grams of polyoxyethylene polyoxypropylene ether and 220 grams of water), 100 grams of 5% avermectin emulsifiable concentrate, 40 grams of 25% pymetrozine suspension, 100 grams of 10% avermectin·chlorfenapyr suspension, 40 grams of 25% pyraclostrobin suspension, 200 grams of potassium phosphite foliar fertilizer, and make up with water.

[0045] Aerial spray solution system for plant protection drone spraying 10: 10 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 100 g of isomeric alcohol polyoxyethylene ether, 120 g of isooctyl alcohol polyoxyethylene ether, 280 g of polycarboxylate, 150 g of propylene glycol butyl ether, 50 g of EDTA-2Na, 80 g of polyoxyethylene polyoxypropylene ether and 220 g of water), 100 g of 5% avermectin emulsifiable concentrate, 40 g of 25% pymetrozine suspension, 100 g of 10% avermectin·chlorfenapyr suspension, 40 g of 25% pyraclostrobin suspension, 200 g of potassium phosphite foliar fertilizer, and water to make up Aerial spraying solution system for plant protection drone spraying 11: 20 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 100 grams of isomeric alcohol polyoxyethylene ether, 120 grams of isooctyl alcohol polyoxyethylene ether, 280 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 50 grams of EDTA-2Na, 80 grams of polyoxyethylene polyoxypropylene ether and 220 grams of water), 100 grams of 5% avermectin emulsifiable concentrate, 40 grams of 25% pymetrozine suspension, 100 grams of 10% avermectin·chlorfenapyr suspension, 40 grams of 25% pyraclostrobin suspension, 200 grams of potassium phosphite foliar fertilizer, and make up with water.

[0046] Aerial spraying solution system for plant protection drone spraying 12: 30 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 100 g of isomeric alcohol polyoxyethylene ether, 120 g of isooctyl alcohol polyoxyethylene ether, 280 g of polycarboxylate, 150 g of propylene glycol butyl ether, 50 g of EDTA-2Na, 80 g of polyoxyethylene polyoxypropylene ether and 220 g of water), 100 g of 5% avermectin emulsifiable concentrate, 40 g of 25% pymetrozine suspension, 100 g of 10% avermectin·chlorfenapyr suspension, 40 g of 25% pyraclostrobin suspension, 200 g of potassium phosphite foliar fertilizer, and make up with water.

[0047] The performance of the aerial spraying solution system 9-12 was tested, and the results are shown in Table 3. The amount of the special anti-flocculation and precipitation spraying aid added directly affects the dispersion stability and atomization performance of the system. When the special anti-flocculation and precipitation spraying aid for aerial spraying is ≥20 ml, the surface tension drops below 35 mN / m, and the droplet size is controlled within the range of 150-200 μm, which meets the technical requirements for efficient aerial spraying.

[0048] Table 3 Liquid state and median particle size of flying spray solution system 9-12

[0049] Experimental Example 4: Plant protection drone spraying to control citrus spider mites and anthracnose: Aerial spraying solution system for plant protection drone spraying 13: 0 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 100 grams of isomeric alcohol polyoxyethylene ether, 120 grams of isooctyl alcohol polyoxyethylene ether, 280 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 50 grams of EDTA-2Na, 80 grams of polyoxyethylene polyoxypropylene ether and 220 grams of water), 40% phenyl ether•pyraclostrobin suspension 80 grams, 43% bifenazate suspension 50 grams, 25%% etoxazole suspension 60 grams, potassium phosphite foliar fertilizer 200 grams, 0.004% brassinolide aqueous solution 80 grams, and make up for the water.

[0050] Aerial spraying solution system for plant protection drone spraying 14: 10 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 100 grams of isomeric alcohol polyoxyethylene ether, 120 grams of isooctyl alcohol polyoxyethylene ether, 280 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 50 grams of EDTA-2Na, 80 grams of polyoxyethylene polyoxypropylene ether and 220 grams of water), 80 grams of 40% phenyl ether•pyraclostrobin suspension, 50 grams of 43% bifenazate suspension, 60 grams of 25% etoxazole suspension, 200 grams of potassium phosphite foliar fertilizer, 80 grams of 0.004% brassinolide aqueous solution, and make up for the water.

[0051] Aerial spraying solution system for plant protection drone spraying 15: 20 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 100 grams of isomeric alcohol polyoxyethylene ether, 120 grams of isooctyl alcohol polyoxyethylene ether, 280 grams of polycarboxylate, 150 grams of propylene glycol butyl ether, 50 grams of EDTA-2Na, 80 grams of polyoxyethylene polyoxypropylene ether and 220 grams of water), 80 grams of 40% phenyl ether•pyraclostrobin suspension, 50 grams of 43% bifenazate suspension, 60 grams of 25% etoxazole suspension, 200 grams of potassium phosphite foliar fertilizer, 80 grams of 0.004% brassinolide aqueous solution, and make up for the water.

[0052] Aerial spraying solution system for plant protection drone spraying 16: 30 ml of special anti-flocculation and precipitation spray adjuvant for aerial spraying (components: 100 g of isomeric alcohol polyoxyethylene ether, 120 g of isooctyl alcohol polyoxyethylene ether, 280 g of polycarboxylate, 150 g of propylene glycol butyl ether, 50 g of EDTA-2Na, 80 g of polyoxyethylene polyoxypropylene ether and 220 g of water), 80 g of 40% phenyl ether•pyraclostrobin suspension, 50 g of 43% bifenazate suspension, 60 g of 25% etoxazole suspension, 200 g of potassium phosphite foliar fertilizer, 80 g of 0.004% brassinolide aqueous solution, and make up for the water.

[0053] The performance of the aerial spraying solution system 13-16 was tested, and the results are shown in Table 4. The surfactant reduces the viscosity of the liquid, and the droplet size is reduced to 125-142 microns, which meets the "fine droplets" (<150 μm) requirements of aerial spraying. At the same time, EDTA-2Na inhibits chelation flocculation to avoid particle size fluctuations. When the anti-flocculation precipitation spraying aid for aerial spraying is ≥20 ml, the system is stable, the surface tension is ≤32 mN / m, and the droplet size is ≤150 microns, which is suitable for high-load aerial spraying needs.

[0054] Table 4 Liquid state and median particle size of flying spray solution system 13-16

[0055] Experimental verification shows that when the addition amount of the special anti-flocculation and precipitation spray adjuvant for aerial spraying of the present invention exceeds 20 mL, the particle size control and system stability are significantly improved, the dosage of the adjuvant is positively correlated with the stabilization effect, and it shows universal compatibility with multi-component mixed systems containing different pesticides and foliar fertilizers, which can effectively meet the stringent requirements of low-volume application of pesticides by drones on the dispersion and stability of the liquid medicine.

[0056] Experimental Example 5: The present invention also conducted a corresponding rice field efficacy experiment, and the specific experimental contents are as follows: Rice experiment, mainly to control rice stem borer, rice borer, rice planthopper, sheath blight and rice false smut Rice test site: Longwangmiao Village, Chunhua Town, Changsha County, Hunan (rice drone low-volume spray test); Test time: Rice test 2024.07.15-2024.08.15 Test liquid group: The test group selected the aerial spray solution systems 3, 7, and 11 of the implementation case (the amount of the special anti-flocculation and precipitation spray adjuvant for aerial spray was 20 ml); Rice test method: low-volume spraying by drone, drone flight parameters: Shenzhen DJI T60 electric four-rotor crop protection drone, nozzle model LX07550SX centrifugal nozzle, nozzle quantity 4, spraying parameters set at 90-200µm droplet size, 2L / mu spraying flow, 3m / s flight speed, 1.5m flight height from crop canopy, 3m spray width. The temperature during operation was 32℃, wind speed was 2-3m / s, and the spray width was 2*667m 2 For one plot, spray twice, with an interval of 7 days. Commercially available liquid group: Test groups 17, 18, and 19 were aerial spray solution systems, in which the aerial spray adjuvants in systems 3, 7, and 11 were replaced with commercially available agricultural vegetable oil adjuvants (the rice test was Maifei, produced by Beijing Guangyuan Yinong Chemical Co., Ltd.; the citrus test was Zhirun Expert agricultural vegetable oil, produced by Guangzhou Oulian Biotechnology Co., Ltd.), and the others remained unchanged; Blank solution group: replace the spray adjuvant in the spray spray solution system 3, 7, and 11 with water, and keep the rest unchanged (the blank group had nozzle clogging immediately when applying the pesticide, and the test failed, so there is no data in the table) Clear water group: The drug solution in the clear water group was water.

[0057] The data on the efficacy of aerial spraying liquid system in controlling rice stem borer can be found in Figure 2 , according to the method of GB / T17980.1-2000, the occurrence of Chilo suppressalis in the field was investigated. The specific method was to investigate the number of dead hearts of rice at 7, 14, 21 and 35 days after application of pesticides, record the number of dead hearts and tillers of each rice plant, and then calculate the dead heart rate according to formula (1), and calculate the control effect by formula (2);

[0058] (1) (2)

[0059] When the liquid volume of the application was 2 liters / mu, both the test group (adding the adjuvant of the present invention) and the commercial group (adding Maifei) showed good control effects on the rice stem borer. However, comparative analysis found that adding the adjuvant of the present invention has significant advantages in control effect and persistence: the difference in control effect between the two groups was apparent on the 7th, 14th, 21st and 35th days after application; on the 14th day of application, the test group 15 still maintained an excellent control effect of 95.4%, which was 26 percentage points higher than the control effect level of 75.9% of the commercial group. This data shows that the adjuvant of the present invention can not only prolong the lasting period of the agent, but also significantly improve the continuous control capability of the rice stem borer, showing stronger technical competitiveness in the drone application scenario.

[0060] The data on the effect of the aerial spraying liquid system on the control of rice leaf folder are shown in Table 6. The occurrence of rice leaf folder in the field was investigated according to GB / T17980.2-2000. The specific method is as follows: the number of rolled leaves caused by rice leaf folder was investigated 3, 7, 14 and 21 days after the application of the pesticide, and the number of damaged leaves and the total number of leaves of each rice plant were recorded respectively. Then the leaf rolling rate was calculated according to formula (3), and the control effect was calculated by formula (4);

[0061] (3) (4) The control effect of low-volume spraying by plant protection drones on rice leaf rollers is as follows Figure 3 As shown, when the application rate is 2L / mu, 3, 7, 14, and 21 days after application, both the test group (adding the adjuvant of the present invention) and the commercially available group (adding Maifei) have good control effects on rice leaf folders, but the experimental group adding the adjuvant of the present invention has better control effect on rice leaf folders.

[0062] The effect data of the aerial spray liquid system on rice planthoppers are shown in Table 5. The insect population base was investigated before treatment, and the occurrence of rice planthoppers was investigated 1, 3, 7, and 14 days after the second application of the pesticide. 10 to 15 points were sampled and investigated in each plot, with 2 clumps at each point. The rice clumps were shaken or patted, and the number of planthoppers floating on the water surface between the rice clumps was counted. Then the insect population reduction rate was calculated according to formula (5), and the control effect was calculated by formula (6);

[0063] (5) (6) Table 5 Data on the efficacy of aerial spraying liquid system in controlling rice planthoppers

[0064] Under the conditions of drone spraying, when the spraying liquid volume is set to 2 liters / mu, both the test group (adding the adjuvant of the present invention) and the commercially available control group (adding the Maifei adjuvant) can achieve effective control of rice planthoppers. It is worth noting that compared with commercially available adjuvants, the adjuvant of the present invention exhibits dual technical advantages: first, it can extend the effective period of existing agents; second, in the critical prevention and control window period of 7-14 days after spraying, its insect population reduction rate is increased by more than 5%-10 percentage points compared with the commercially available control group (adding the Maifei adjuvant). These technical features enable the adjuvant of the present invention to form a significant competitive advantage in aerial spraying operations, and provide an innovative solution for building a long-term and stable rice planthopper prevention and control system.

[0065] The data on the efficacy of the aerial spraying liquid system for the control of rice sheath blight are shown in Table 6. According to the "Guidelines for Field Efficacy Tests of Pesticides (I) Control of Rice Sheath Blight with Fungicides" (GB / T17980.20-2000), the first application of pesticides was protective application, and the base number was not investigated. The efficacy was investigated once 14d and 28d after the second application. According to the damage of rice sheaths and leaves, the plant was used as the unit, and 5 points on the diagonal of the plot were sampled. Each point was connected to 5 clusters, a total of 25 clusters, and the number of plants at each disease level and the total number of plants investigated were recorded. The disease index was calculated and the control effect was calculated. The disease classification standards are as follows: Level 0, the whole plant is disease-free; Level 1, the fourth leaf and the following leaf sheaths and leaves are diseased (the sword leaf is the first leaf); Level 3, the third leaf and the following leaf sheaths and leaves are diseased; Level 5, the second leaf and the following leaf sheaths and leaves are diseased; Level 7, the sword leaf and the following leaf sheaths and leaves are diseased; Level 9, the whole plant is diseased and dies prematurely. The disease index is calculated according to formula (7), and the control effect is calculated by formula (8).

[0066] Calculate the disease index and prevention and treatment effect. The calculation formula is as follows: (7) (8) Table 6 Data on the efficacy of aerial spraying liquid system in controlling rice sheath blight

[0067] According to the analysis of the field efficacy test data, under the condition of drone application, both the test group (adding the adjuvant of the present invention) and the commercial group (Maifei adjuvant) showed good control effects on rice sheath blight, but the adjuvant of the present invention showed better control sustainability. Data 7 days after the drug application showed that the disease index of the test group was stable in the range of 1.26-1.30, and the control effect reached 80.55%-81.27%, which was 3.0-5.8 percentage points higher than that of the commercial group (disease index 1.44-1.59, control effect 75.50%-77.97%). In the critical control window period of 14 days after the drug application, the control effect of the test group remained at 83.12%-84.25%, and the disease index only increased by 0.42-0.48; while the control effect of the commercial group dropped to 76.94%-79.83%, and the disease index increased by 0.48-0.89, reflecting that the adjuvant of the present invention can effectively prolong the duration of the drug.

[0068] The data on the effect of the aerial spraying liquid system on the control of rice false smut are shown in Table 7. During the stable period of rice false smut and before rice harvest, the five-point sampling method was used to survey 50 clusters in each plot, and the number of diseased panicles, the number of diseased panicles and the total number of panicles in each cluster were recorded. The diseased panicle rate was calculated according to formula (9), the disease index was calculated according to formula (10), and the control effect was calculated by formula (11);

[0069] (9) (10) (11) Table 7 Data on the effect of aerial spraying liquid system on controlling rice false smut

[0070] According to the aerial spraying efficacy test data, the adjuvant of the present invention shows significant advantages in the prevention and control of rice smut. The diseased ear rate of the test group (adding the adjuvant of the present invention) was controlled at 1.6%-2.3%, which was 44.4%-55.6% lower than the 3.0%-3.6% of the commercially available group (Mifei); the disease index was stable in the range of 0.8-1.0, which was significantly lower than the 1.4-1.5 of the commercially available group. In terms of the core indicator disease index control effect, the test group reached 74.2%-80.5%, which was 3.1-9.3 percentage points higher than the 71.2%-73.1% of the commercially available group. The results show that the synergistic effect of the adjuvant of the present invention and the agent significantly inhibits the spread of the pathogen, and the improved stability of the control effect verifies its characteristic of extending the duration of the agent.

[0071] Experimental Example 6: The present invention also conducted a citrus field test, the specific contents of which are as follows: Citrus test method: spraying pesticides by drone, drone flight parameters: Shenzhen DJI T60 electric multi-rotor agricultural drone, nozzle model LX07550SX centrifugal nozzle, 4 nozzles, spraying parameters set at 90-200µm droplet size, 2L / 15 citrus trees, flight speed 3m / s, flight altitude set at 3.0m from crop canopy, spray width 3m. The temperature during operation was 28℃, wind speed 2-3m / s, 15 citrus trees as a plot, spraying twice, 7 days apart. After spraying, the growth of leaves and fruits of crops was observed irregularly, and no abnormalities were found, and no pesticide damage occurred. The citrus test time is 2024.10.15-2024.11.15.

[0072] Before the plant protection drone spray test, three leaves were taken from the upper, middle and lower canopies of each fruit tree, and from the east, south, west, north and center. The number of red spider mites was recorded by hanging signs. The number of live adults and nymphs on citrus leaves was investigated in the evening of 1 day, 3 days and 7 days after spraying. A total of 4 investigations were conducted. The insect population reduction rate and control effect were calculated according to the national standard "GB / T17980.9-2000 Pesticide Field Efficacy Test Guidelines (I) Insecticide Control of Fruit Tree Aphids". Then the insect population reduction rate was calculated according to formula (12), and the control effect was calculated by formula (13);

[0073] (12) (13) Table 8 Data on the efficacy of the aerial spraying liquid system in controlling citrus red spider mites

[0074] The data on the effect of the aerial spraying liquid system on the control of citrus red spider mites are shown in Table 8. The insect population reduction rate of the test group (the aerial spraying liquid system 15 of the present invention) reached 74.45% one day after the application, and the control effect was 74.97%, which was 5.3 percentage points higher than that of the commercial group (reduction rate 69.15%, control effect 70.55%), achieving a rapid pest control effect. As time went on, the control effect of the test group continued to increase: the control effect reached 82.39% three days after the application (commercial group 76.24%), and the control effect increased to 89.13% seven days after the application (commercial group 81.21%). Compared with the commercial group, the control effect of the adjuvant of the present invention increased from the initial 4.4 percentage points to 7.9 percentage points, verifying its extended duration characteristics.

[0075] The data on the efficacy of the aerial spraying liquid system in controlling citrus anthracnose are shown in Table 9. According to DB36 / T1128.3-2019 Pesticide Field Efficacy Test Guidelines Part 3: Fungicide Control of Citrus Anthracnose, the damage of anthracnose to citrus fruits was investigated 21 days and 35 days after the last application of pesticides. Samples were taken from five points in the southeast, northwest and center of each plant, and 10 fruits were investigated at each point, with a total of 100 fruits in each plot; the number of diseased fruits at each level and the total number of fruits investigated were investigated and counted. Fruit disease grading method: 0, no lesions; 1, the area of ​​lesions outside the fruit pedicle accounts for less than 2% of the total fruit area; 3, the area of ​​lesions outside the fruit pedicle accounts for 3% to 5% of the total fruit area; 5, the area of ​​lesions outside the fruit pedicle accounts for 6% to 10% of the total fruit area; 7, the area of ​​lesions outside the fruit pedicle accounts for 11% to 20% of the total fruit area; 9, lesions appear on the fruit pedicle or the area of ​​lesions outside the fruit pedicle accounts for more than 21% of the total fruit area. Use formulas (14) and (15) to calculate the efficacy;

[0076] (14) (15) Table 9 Data on the efficacy of the aerial spraying liquid system in controlling citrus anthracnose

[0077] The protective effect of the test group reached 72.14% 21 days after application, which was 9.23 percentage points higher than that of the commercially available group; by 35 days after application, the protective effect increased to 80.94% (the commercially available group was only 68.48%), and the protective effect gap widened to 12.46 percentage points, verifying that the adjuvant of the present invention has better sustained effect gain characteristics.

[0078] In summary, the present invention has a good coating and suspension effect on pesticide particles and foliar fertilizers, and has a good stabilizing effect on most of the existing commercially available pesticide preparations and foliar fertilizers and mixed solution systems of related formulas. The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements can be made without departing from the principle of the present invention, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. A special anti-flocculation precipitation spray adjuvant for aerial defense, characterized in that: The special anti-flocculation and precipitation spray auxiliary agent for aerial defense is composed of the following raw materials in percentage by mass: 5%-12% of isomeric alcohol polyoxyethylene ether, 10%-20% of isooctyl alcohol polyoxyethylene ether, 15%-30% of polycarboxylate, 10%-20% of propylene glycol butyl ether, 5%-15% of EDTA-2Na, 5%-18% of polyoxyethylene polyoxypropylene ether and 10%-30% of water.

2. The anti-flocculation precipitation spray adjuvant for aerial defense according to claim 1, characterized in that: The special anti-flocculation and precipitation spraying auxiliary agent for aerial defense is composed of the following raw materials in percentage by mass: 8% of isomeric alcohol polyoxyethylene ether, 15% of isooctyl alcohol polyoxyethylene ether, 25% of polycarboxylate, 15% of propylene glycol butyl ether, 10% of EDTA-2Na, 10% of polyoxyethylene polyoxypropylene ether and 17% of water.

3. The anti-flocculation precipitation spray adjuvant for aerial defense according to claim 1, characterized in that: The special anti-flocculation and precipitation spraying auxiliary agent for aerial defense is composed of the following raw materials in percentage by mass: 12% of isomeric alcohol polyoxyethylene ether, 10% of isooctyl alcohol polyoxyethylene ether, 20% of polycarboxylate, 15% of propylene glycol butyl ether, 8% of EDTA-2Na, 15% of polyoxyethylene polyoxypropylene ether and 20% of water.

4. The anti-flocculation precipitation spray adjuvant for aerial defense according to claim 1, characterized in that: The special anti-flocculation and precipitation spraying auxiliary agent for aerial defense is composed of the following raw materials in percentage by mass: 10% of isomeric alcohol polyoxyethylene ether, 12% of isooctyl alcohol polyoxyethylene ether, 28% of polycarboxylate, 15% of propylene glycol butyl ether, 5% of EDTA-2Na, 8% of polyoxyethylene polyoxypropylene ether and 22% of water.

5. A method for preparing a special anti-flocculation and precipitation spraying aid for aerial defense, comprising the following steps: weighing each raw material according to the mass percentage of each raw material in claims 1-4; uniformly stirring and mixing isomeric alcohol polyoxyethylene ether, isooctyl alcohol polyoxyethylene ether and propylene glycol butyl ether at a speed of 30-80 rpm; then dropwise adding EDTA-2Na, polycarboxylate and water, and causing a conjugation reaction together at 30-50°C; finally adding polyoxyethylene polyoxypropylene ether and stirring evenly, and standing for more than 1 hour to obtain the special anti-flocculation and precipitation spraying aid for aerial defense.

6. Use of the anti-flocculation and precipitation spraying adjuvant for aerial spraying according to claims 1-4 in the preparation of aerial spraying solution.

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