Ethiprole-dinotefuran oil suspending agent as well as preparation method and application thereof

Abstract

The invention relates to the field of pesticide suspending agents, in particular to an ethiprole-dinotefuran oil suspending agent and a preparation method and application thereof. The ethiprole-dinotefuran oil suspending agent is prepared from the following components in parts by weight: 5-20 parts of ethiprole, 6-10 parts of dinotefuran, 2-4 parts of a stabilizer, 11-15 parts of a surfactant, 2-4 parts of a thickening agent and the balance of an oil solvent, wherein the total weight part of the ethiprole-dinotefuran oil suspending agent is 100 parts; the stabilizer comprises at least one of tert-butylhydroquinone and epoxidized soybean oil. The stability of ethiprole and dinotefuran is effectively improved through the oil solvent, the tert-butylhydroquinone delays oxidative deterioration of the oil solvent, ethiprole and dinotefuran, and the epoxidized soybean oil helps to reduce the possibility of decomposition of ethiprole and dinotefuran at high temperature; through the cooperation between the oil solvent and the tert-butylhydroquinone and / or the epoxidized soybean oil, the stability after the ethiprole and the dinotefuran are compounded can be effectively enhanced, so that the insecticidal effects of the ethiprole and the dinotefuran are exerted.

Description

Technical Field

[0001] The present application relates to the field of pesticide suspensions, and in particular to an ethiprole-dinotefuran oil suspension, a preparation method thereof, and an application thereof. Background Art

[0002] Rice planthoppers include brown planthoppers, white-backed planthoppers and gray planthoppers. They are the most threatening migratory pests in Asia's rice-growing areas and are listed as a Class I crop pest in my country by the Ministry of Agriculture and Rural Affairs. They seriously endanger the safety of rice production in my country. Rice planthoppers obtain energy by sucking the juice of plant stem and leaf tissues. When feeding, their saliva secretes toxic substances, causing brown spots on the upper part of the stem and brown and black changes on the lower part of the stem, resulting in root rot, odor and plant lodging. When female rice planthoppers lay eggs, they use their ovipositors to pierce the leaf sheaths and leaves, causing the rice plants to lose water and become infected with sclerotinia disease. Their excrement often leads to the breeding of mold and insects, affecting the photosynthesis and respiration of rice. When the damage is serious, the moisture content of the rice plants rapidly decreases, the protein and starch content in the leaves decreases, the free amino acids and reducing sugars increase significantly, the base of the rice stems turn black and rot, and even the entire clump may fall over and die. The affected rice clumps often start with spots or patches, and look yellower and shorter than normal rice plants from a distance. This is commonly known as "penetration", "top penetration" or "collapse". Repeated occurrences often result in a total field failure.

[0003] Wheat aphids, commonly known as oilworms, greasy insects, and honeyworms, are one of the main pests of wheat. They can cause piercing and sucking damage to wheat, affecting wheat photosynthesis and nutrient absorption and conduction. After wheat heading, the damage is concentrated on the ear, forming barren grains, reducing the thousand-grain weight and causing a reduction in yield. It occurs in wheat-growing areas around the world. It mainly harms wheat and other gramineous crops and weeds. Nymphs and adults often gather in large numbers on leaves, stems, and ears to suck juice. The damaged parts initially appear as small yellow spots, and then stripes, withering, and the entire plant becomes dry and dead, which has a serious impact on wheat yields.

[0004] Ethiopromide is an aromatic pyrazole insecticide that can control rice planthoppers and aphids. It is highly effective, requires a small amount of medicine, has a long lasting effect, is safe for crops, is low in toxicity to fish, and has little impact on the ecological environment. Dinotefuran is a third-generation nicotine insecticide developed by Mitsui Chemicals of Japan. Its chemical structure is very different from that of existing nicotine insecticides. Its tetrahydrofuranyl group replaces the previous chloropyridyl and chlorothiazolyl groups, and it does not contain halogen elements. At the same time, its performance is also different from that of nicotine. This agent has a wide insecticide spectrum, excellent systemic penetration, and shows high insecticidal activity at very low doses.

[0005] In daily production, in order to prevent pests from developing resistance, farmers usually spray ethiprole and dinotefuran separately for prevention and control. Although this can effectively prevent pests from developing resistance, in actual operations, the concentration of ethiprole or dinotefuran is often continuously increased until the pest control effect is found to be poor, and then another pesticide is considered. This method of use not only increases production costs, but also has more impacts on the environment. When ethiprole and dinotefuran are directly compounded, the stability of both is poor due to the reduction in the usage of both, so that the final pest control effect does not meet people's expectations. Summary of the invention

[0006] In order to solve the problem of poor stability of ethiprole and dinotefuran after direct compounding, the present application provides an ethiprole-dinotefuran oil suspension, which dissolves ethiprole and dinotefuran through an oil solvent, and adds tertiary butylhydroquinone and / or epoxy soybean oil to effectively enhance the stability of ethiprole and dinotefuran after compounding, thereby exerting the insecticidal effect of ethiprole and dinotefuran.

[0007] In the first aspect, the present application provides an ethiprole-dinotefuran oil suspension, which adopts the following technical solution: An ethiprole-dinotefuran oil suspension comprises the following components in parts by weight: 5-20 parts of ethiprole, 6-10 parts of dinotefuran, 2-4 parts of a stabilizer, 11-15 parts of a surfactant, 2-4 parts of a thickener, and the total weight of the oil solvent is 100 parts; The stabilizer includes at least one of tert-butylhydroquinone and epoxidized soybean oil.

[0008] By adopting the above technical solution, the oil molecules have greater affinity and can better maintain the suspended state of particles, thereby significantly improving the physical stability of the ethiprole-dinotefuran oil suspension. Compared with water suspension, the particles in the oil suspension are not easy to settle and agglomerate, and can maintain a uniform dispersion state for a long time. The oil solvent can better protect ethiprole and dinotefuran from the influence of the external environment, such as light, temperature fluctuations, etc. The barrier effect of the oil solvent can reduce the contact between ethiprole and dinotefuran and active substances such as oxygen and water in the air, thereby delaying their oxidative degradation process.

[0009] Ethiopromide is prone to Ostwald ripening in water, resulting in agglomeration, which limits its concentration in water suspension concentrates. The addition of oil solvents allows the concentration of ethiprole and dinotefuran to reach more than 20%, which is significantly higher than the level in the prior art. This not only improves the utilization rate of pesticides, but also reduces the amount of pesticides used and reduces environmental pollution. Oil suspension concentrates usually have better adhesion and spreadability, and can more easily adhere to the surface of plants or pests. This helps to improve the insecticidal effect of pesticides and reduce the loss and waste of pesticides.

[0010] Tertiary butylhydroquinone (TBHQ) is a highly effective antioxidant that can prevent or delay the oxidation and deterioration of oils and fats. In the ethiprole-dinotefuran oil suspension, TBHQ can protect ethiprole and dinotefuran from oxidative degradation, thereby extending their shelf life. As one of the stabilizers, epoxidized soybean oil can help ethiprole and dinotefuran to be better dispersed and mixed in the oil solvent. This helps to improve the insecticidal effect of the pesticide and reduce the stratification and precipitation of the pesticide during storage and use. Epoxidized soybean oil has excellent heat resistance, which helps to reduce the possibility of ethiprole and dinotefuran decomposition or degradation under high temperature conditions.

[0011] The present application can effectively improve the stability of ethiprole and dinotefuran and delay their oxidative decomposition process by adopting an oil solvent, and the oil suspension can more easily adhere to the surface of plants or the body surface of pests, which helps to improve the insecticidal effect of the pesticide; tert-butylhydroquinone can not only prevent or delay the oxidative deterioration of the oil solvent, but also protect ethiprole and dinotefuran from the influence of oxidative degradation, thereby extending their shelf life; epoxidized soybean oil can help ethiprole and dinotefuran to be better dispersed and mixed in the oil solvent, and help to reduce the possibility of ethiprole and dinotefuran decomposition or degradation under high temperature conditions; through the coordination between the oil solvent and tert-butylhydroquinone and / or epoxidized soybean oil, the stability of ethiprole and dinotefuran after compounding can be effectively enhanced, thereby exerting the insecticidal effect of ethiprole and dinotefuran.

[0012] Preferably, the mass ratio of ethidium bromide to dinotefuran is 1-6:2.

[0013] By adopting the above technical solution, ethiprole is used as one of the insecticidal active ingredients, and ethiprole is effective against a variety of chewing and sucking pests, and has a broad-spectrum insecticidal activity. Dinotefuran is also used as an insecticidal active ingredient, and dinotefuran also has a significant control effect on a variety of pests. After the two are compounded, they show a synergistic effect in the above ratio.

[0014] Preferably, the stabilizer is a mixture of tert-butylhydroquinone and epoxidized soybean oil.

[0015] Preferably, the mass ratio of tert-butylhydroquinone to epoxidized soybean oil is 1-2:1.

[0016] By adopting the above technical solution, TBHQ and epoxidized soybean oil can play a synergistic role in the ethiprole-dinotefuran oil suspension concentrate. TBHQ is mainly responsible for anti-oxidation, protecting the pesticide molecules from oxidative degradation; while epoxidized soybean oil is responsible for improving dispersibility and heat resistance, enhancing the stability and use effect of the pesticide.

[0017] If the proportion of TBHQ is too low, its antioxidant properties may not be sufficient to completely protect ethiprole and dinotefuran from oxidative degradation. This will lead to reduced stability of the pesticides, shortened shelf life, and may affect their insecticidal effects. In addition, when the proportion of epoxidized soybean oil in the oil solvent is too low, it may not be able to fully help ethiprole and dinotefuran disperse in the oil solvent. This will cause the pesticides to be easily stratified and precipitated during storage and use, affecting their use effect.

[0018] In addition, tert-butylhydroquinone can not only protect ethiprole and dinotefuran from oxidation, but also prevent or delay the oxidation and deterioration of oils and fats. When the two are compounded, it is better for the content of tert-butylhydroquinone to be higher than that of epoxidized soybean oil.

[0019] Preferably, the surfactant is selected from at least one of alkylphenol polyoxyethylene ether, oleic acid polyoxyethylene ether, castor oil polyoxyethylene ether and polyoxyethylene alcohol.

[0020] By adopting the above technical solution, alkylphenol polyoxyethylene ether has excellent permeability and can quickly penetrate into the surface of plants or pests, thereby improving the insecticidal effect of pesticides. As a nonionic surfactant, alkylphenol polyoxyethylene ether has excellent emulsification and dispersing effects. This helps ethiprole and dinotefuran to be evenly dispersed in the oil solvent and reduce stratification and precipitation.

[0021] Oleic acid polyoxyethylene ether, as a defoamer, can quickly eliminate the foam generated during the preparation and use of pesticides, which helps to improve the preparation efficiency and use effect of pesticides. Oleic acid polyoxyethylene ether has excellent chemical stability, is not afraid of acidity, alkalinity and high temperature, and promotes the stability of ethiprole-dinotefuran oil suspension under various environmental conditions.

[0022] Castor oil polyoxyethylene ether can significantly reduce the surface tension of water and promote oil-water mixing, which helps to improve the adhesion and penetration of pesticides on plant surfaces or pest surfaces. As a surfactant, polyoxyethylene alcohol has excellent wettability, which helps ethiprole and dinotefuran to better wet the plant surface or pest surface and improve the insecticidal effect.

[0023] Preferably, the oil solvent includes at least one of soybean oil, corn oil, rapeseed oil, castor oil, coconut oil, palm oil, turpentine, methyl oleate and cottonseed oil.

[0024] By adopting the above technical scheme, vegetable oils (soybean oil, corn oil, rapeseed oil, castor oil, coconut oil, palm oil, cottonseed oil), which are derived from natural crops, have good biodegradability. These vegetable oils have good wettability and dispersibility, which help ethiprole and dinotefuran to be evenly dispersed in oil solvents. Turpentine and methyl oleate also have good wettability and dispersibility, which help ethiprole and dinotefuran to be evenly dispersed in oil solvents.

[0025] Preferably, the thickener includes at least one of magnesium aluminum silicate, organic bentonite and white carbon black.

[0026] By adopting the above technical solution, magnesium aluminum silicate can give the system good thixotropy, that is, it has high viscosity when static, but the viscosity decreases under the action of shear force, which is convenient for construction. At the same time, it can also effectively increase the consistency of the system and improve the stability of the product.

[0027] Organic bentonite has good thickening and thixotropy, and can form gels in various organic solvents, oils, and liquid resins. This makes it an ideal thickener in oil suspensions. Organic bentonite has high temperature stability and chemical stability, and can maintain a stable thickening effect under different environmental conditions.

[0028] Silica has a significant thickening effect, which can improve the consistency and viscosity of pesticide formulations and prevent stratification and precipitation. Good dispersibility and stability help to evenly distribute and maintain the active ingredients of pesticides for a long time.

[0029] In a second aspect, the present application provides a method for preparing an ethiprole-dinotefuran oil suspension concentrate, using the following technical solution: A method for preparing an ethiprole-dinotefuran oil suspension concentrate is used for preparing the ethiprole-dinotefuran oil suspension concentrate, comprising the following steps: firstly mixing a formula amount of ethiprole, dinotefuran, a stabilizer, a surfactant, a thickener and an oil solvent, and then sand-milling to obtain the ethiprole-dinotefuran oil suspension concentrate.

[0030] By adopting the above technical solution, the formula amount of ethiprole, dinotefuran, stabilizer, surfactant, thickener and oil solvent are mixed together in a certain proportion, so that each component is evenly distributed to avoid the situation where the local concentration is too high or too low. The mixed material is sent to a sand mill for sand milling. The purpose of sand milling is to grind the active ingredients and other solid particles into fine and uniform particles to improve the dispersibility and stability of the oil suspension.

[0031] In a third aspect, the present application provides an application of an ethiprole-dinotefuran oil suspension, using the following technical solution: an application of an ethiprole-dinotefuran oil suspension in the control of rice planthoppers and wheat aphids.

[0032] By adopting the above technical scheme, rice planthoppers are one of the main pests on rice and pose a serious threat to rice growth. Ethiopromide-dinotefuran oil suspension can effectively prevent and control rice planthoppers, including brown planthoppers, white-backed planthoppers, etc. Ethiopromide-dinotefuran oil suspension has strong systemic activity, has both contact and stomach poison effects, can be quickly absorbed by rice and transmitted to the top. Therefore, the oil suspension has a significant control effect on rice planthoppers. Field efficacy tests show that after using ethiprole-dinotefuran oil suspension, the mortality rate of rice planthoppers is significantly improved, and the lasting effect is long, which can effectively control the damage of rice planthoppers.

[0033] Wheat aphids are one of the most important pests on wheat. They feed on wheat sap, which hinders wheat growth and reduces yield. Ethiopromide-Dinotefuran oil suspension can effectively prevent and control wheat aphids, including Macrosiphum avenae and Schizaphis avenae. Ethiopromide-Dinotefuran oil suspension also has a significant control effect on wheat aphids. After use, it can quickly reduce the population density of aphids and reduce their damage to wheat.

[0034] Preferably, 40 kg of water is used to dilute the ethiprole-dinotefuran oil suspension concentrate per mu of rice or wheat, and the dosage of the ethiprole-dinotefuran oil suspension concentrate is 8-12 mL.

[0035] By adopting the above technical solution, 40 kilograms (kg) of water are used for dilution per mu. This means that in order to prepare the required pesticide solution per mu, 8-12mL of ethiprole-dinotefuran oil suspension concentrate needs to be evenly dissolved or dispersed in 40kg of water. The recommended dosage of ethiprole-dinotefuran oil suspension concentrate is 8-12 milliliters (mL). This dosage range is based on field trials and pesticide registration data, and is intended to ensure effective pest control while avoiding environmental problems and increased costs caused by excessive use.

[0036] In summary, this application has the following beneficial effects: 1. Since the present application can effectively improve the stability of ethiprole and dinotefuran by using an oil solvent, delay the process of their oxidative decomposition, and the oil suspension can more easily adhere to the surface of plants or the body surface of pests, this helps to improve the insecticidal effect of the pesticide; tert-butylhydroquinone can not only prevent or delay the oxidative deterioration of the oil solvent, but also protect ethiprole and dinotefuran from the influence of oxidative degradation, thereby extending their shelf life; epoxidized soybean oil can help ethiprole and dinotefuran to be better dispersed and mixed in the oil solvent, and help reduce the possibility of ethiprole and dinotefuran decomposition or degradation under high temperature conditions; through the coordination between the oil solvent and tert-butylhydroquinone and / or epoxidized soybean oil, the stability of ethiprole and dinotefuran after compounding can be effectively enhanced, thereby exerting the insecticidal effect of ethiprole and dinotefuran; 2. The control test of rice planthoppers by the present invention shows that the control effect of rice planthoppers can reach more than 85% 1-10 days after application of the drug; the control test of wheat aphids shows that the control effect of wheat aphids can reach more than 85% 1-7 days after application of the drug. DETAILED DESCRIPTION

[0037] The raw materials in this application include the following parts: Ethiopromide: a commercial product with CAS number 181587-01-9 was used; Dinotefuran: a commercial product with CAS No. 165252-70-0 was used; Tert-butylhydroquinone: a commercially available product with CAS No. 1948-33-0; Epoxidized soybean oil: a commercial product with CAS number 8013-07-8; Alkylphenol polyoxyethylene ether: a commercially available product with CAS number 9036-19-5; Oleic acid polyoxyethylene ether: a commercially available product with CAS number 9004-96-0; Castor oil polyoxyethylene ether: a commercially available product with CAS number 61791-12-6; Polyoxyethylene alcohol: a commercially available product with CAS No. 67762-27-0; Magnesium aluminum silicate: a commercially available product with CAS number 71205-22-6; Organic bentonite: a commercial product with CAS number 1302-78-9; White carbon black: a commercially available product with CAS number 10279-57-9; Oil solvent: The oil solvent of the present application can be soybean oil, corn oil, rapeseed oil, castor oil, coconut oil, palm oil, turpentine, methyl oleate and cottonseed oil. The present application only takes commercially available products of soybean oil, corn oil, rapeseed oil and castor oil as examples.

[0038] The present application is further described in detail below in conjunction with embodiments and comparative examples.

[0039] Example 1 A method for preparing an ethiprole-dinotefuran oil suspension comprises the following steps: 10 g of ethiprole, 10 g of dinotefuran, 3 g of tert-butylhydroquinone, 6 g of alkylphenol polyoxyethylene ether, 8 g of oleic acid polyoxyethylene ether, 1 g of magnesium aluminum silicate, 1 g of white carbon black and 62 g of corn oil (used to make up the total weight to 100 g) are mixed, and the mixture is sand-milled for multiple times using a horizontal sand mill to obtain an ethiprole-dinotefuran oil suspension, wherein the average particle size of the ethiprole-dinotefuran oil suspension is 3 mm.

[0040] Embodiment 2-4 Example 2-4 Based on the preparation method of Example 1, the contents of ethiprole and dinotefuran were adjusted, and the specific adjustments are shown in Table 1.

[0041] Comparative Example 1 Comparative Example 1 Based on the preparation method of Example 1, the contents of ethiprole and dinotefuran were adjusted, and the specific adjustments are shown in Table 1.

[0042] Table 1 Contents of ethiprole and dinotefuran and performance test table of Examples 1-4 and Comparative Example 1 The following performance tests were performed on the ethiprole-dinotefuran oil suspension concentrates of Examples 1-4 and Comparative Example 1. The test results are shown in Table 1.

[0043] Indoor virulence test of rice planthopper The LC values ​​of ethiprole, dinotefuran and each insecticide combination were determined using the NY / T1154.11-2008 Pesticide Indoor Bioassay Test Guidelines Insecticides Part 11: Rice Stem Dipping Method. 50 Value and LC 90 The DPS statistical software was used to perform regression analysis on the logarithmic values ​​of the treatment concentrations and the corresponding inhibition rate probability values ​​of each single agent and different mixed combinations, and the toxicity regression curve and correlation coefficient were calculated. The co-toxicity coefficient of the mixture was calculated according to the Sun Yunpei method. The co-toxicity coefficient (CTC) of the compound combination ≥ 120 showed a synergistic effect; CTC ≤ 80 showed an antagonistic effect; 80 < CTC < 120 showed an additive effect. In this experiment, brown planthoppers on rice were used, and the concentrations of the insecticide combination were 10, 4, 1, 0.4, 0.1, 0.04, and 0.01 mg / L, respectively.

[0044] Referring to Table 1, by comparing Examples 1-4 with Comparative Example 1, it can be seen that the LC of the rice planthopper of the compositions of Examples 1-4 is 50 Value and LC 90 Values, LC values ​​of ethiprole and dinotefuran alone for rice planthoppers 50 Value and LC 90 The LC values ​​of the rice planthoppers of the composition of Comparative Example 1 were 0. 50 Value and LC 90 The values ​​are between the LC values ​​of ethiprole and dinotefuran for rice planthoppers 50 Value and LC 90 The co-toxicity coefficient of rice planthoppers showed an additive effect between the values. This shows that the combination of ethiprole and dinotefuran has a good control effect on rice planthoppers, and the mass ratio of ethiprole to dinotefuran in the combination is 1-6:2, which is more conducive to improving the control effect.

[0045] In addition, by comparing Examples 1-4, it was found that the co-toxicity coefficient of Example 1 was the highest, and the LC of the rice planthopper of Example 1 was 50 Value and LC 90 Therefore, taking all factors into consideration, Example 1 is preferred.

[0046] Embodiment 5-9 In Example 5-9, based on the preparation method of Example 1, the contents of tert-butylhydroquinone and epoxy soybean oil were adjusted. The specific adjustments are shown in Table 2.

[0047] Comparative Example 2 Comparative Example 2 is based on the preparation method of Example 1, except that tert-butylhydroquinone and epoxy soybean oil are not added, and other conditions remain unchanged.

[0048] The following performance tests were performed on the ethiprole-dinotefuran oil suspension concentrates of Examples 5-9 and Comparative Example 2. The test results are shown in Table 2.

[0049] Table 2 Content and performance test table of tert-butylhydroquinone and epoxy soybean oil in Example 1, Examples 5-9 and Comparative Example 2 Performance Testing stability The ethiprole-dinotefuran oil suspension was stored at room temperature for 30 days, at 0°C for 14 days, and at 54°C for 14 days, respectively, to investigate the oil separation and the decomposition rate of the active ingredients (dinotefuran and ethiprole).

[0050] Referring to Table 2, by comparing Example 1, Examples 5-9 and Comparative Example 2, it can be seen that the oil separation rate, the decomposition rate of ethiprole and dinotefuran in Examples 1 and Examples 5-9 under the three conditions of room temperature, 0°C and 54°C are much lower than those in Comparative Example 2, indicating that the addition of tert-butylhydroquinone and / or epoxidized soybean oil can effectively improve the stability of the ethiprole-dinotefuran oil suspension concentrate.

[0051] In comparison, the oil separation rate, the decomposition rate of ethiprole and dinotefuran at room temperature and 0°C of Example 5 are the lowest, and the oil separation rate, the decomposition rate of ethiprole and dinotefuran at 54°C are also at a relatively low level. The reason is that tertiary butylhydroquinone can not only protect ethiprole and dinotefuran from oxidation, but also prevent or delay the oxidation and deterioration of oils and fats, while the epoxidized soybean oil is responsible for improving the dispersibility and heat resistance. Comprehensive comparison shows that the performance of Example 5 is the best.

[0052] Examples 10-15 Example 10 Based on the preparation method of Example 1, 6g of alkylphenol polyoxyethylene ether and 8g of oleic acid polyoxyethylene ether are replaced with 9g of castor oil polyoxyethylene ether and 6g of polyoxyethylene alcohol, and the other conditions remain unchanged.

[0053] Example 11 Based on the preparation method of Example 1, 6g of alkylphenol polyoxyethylene ether and 8g of oleic acid polyoxyethylene ether are replaced by 11g of alkylphenol polyoxyethylene ether, and the other conditions remain unchanged.

[0054] Example 12 Based on the preparation method of Example 1, 62g of corn oil is replaced with 62g of soybean oil, and the other conditions remain unchanged.

[0055] Example 13 Based on the preparation method of Example 1, 62g corn oil is replaced with 32g rapeseed oil and 30g castor oil, and other conditions remain unchanged.

[0056] Example 14 Based on the preparation method of Example 1, 1g of magnesium aluminum silicate and 1g of white carbon are replaced with 2g of magnesium aluminum silicate and 1g of organic bentonite, and the other conditions remain unchanged.

[0057] Example 15 Based on the preparation method of Example 1, 1g of magnesium aluminum silicate and 1g of white carbon black are replaced with 2.5g of magnesium aluminum silicate, and the other conditions remain unchanged.

[0058] The ethiprole-dinotefuran oil suspension concentrates of Examples 10-15 were subjected to the following performance tests. The test results are shown in Table 3.

[0059] Table 3 Performance test table of Example 1 and Examples 10-15 Referring to Table 3, by comparing Example 1 with Examples 10-15, it can be seen that the surfactants used are alkylphenol polyoxyethylene ether, oleic acid polyoxyethylene ether, castor oil polyoxyethylene ether, and polyoxyethylene alcohol; the oil solvents used are corn oil, soybean oil, rapeseed oil, and castor oil; and the thickeners used are magnesium aluminum silicate, organic bentonite, and white carbon black, all of which can be used in this application.

[0060] Application Examples The above-mentioned embodiments 1-15 can all be put into practical application, and the following application examples are illustrated with the basic formula of embodiment 1.

[0061] Preparation Example 1-3 Preparation Example 1 is to dilute 8 mL of the ethiprole-dinotefuran oil suspension of Example 6 in 40 liters of water per acre of crop area to obtain diluted pesticide 1.

[0062] Preparation Example 2 is to dilute 10 mL of the ethiprole-dinotefuran oil suspension of Example 6 in 40 liters of water per acre of crop area to obtain diluted pesticide 2.

[0063] Preparation Example 3 is to dilute 12 mL of the ethiprole-dinotefuran oil suspension of Example 6 in 40 liters of water per acre of crop area to obtain diluted pesticide 3.

[0064] Comparative Examples 3-4 Comparative Example 3 is to dilute 12 mL of the ethiprole-dinotefuran oil suspension of Comparative Example 2 in 40 liters of water per acre of crop area to obtain comparative diluted pesticide 1.

[0065] Comparative Example 4 is to dilute 40 mL of 100 g / L ethiprole suspension in 40 liters of water per acre of crop area to obtain comparative diluted pesticide 2.

[0066] Comparative Example 5 is to dilute 40 mL of 20% dinotefuran suspension in 40 liters of water per acre of crop area to obtain comparative diluted pesticide 3.

[0067] Preparation Examples 1-3 and Comparative Examples 3-5 were used for field control of the following rice planthoppers and wheat aphids, and the results obtained are shown in Tables 4-5.

[0068] 1. Control of rice planthoppers The diluted pesticides were sprayed evenly on rice plants, and the mortality rate of rice planthoppers was investigated 3, 7 and 10 days after the spraying. The base number of rice planthoppers before the spraying and the number of live insects after the spraying were investigated for each liquid treatment, and the mortality rate was calculated.

[0069] 2. Prevention and control of wheat aphids The diluted pesticides were sprayed evenly on the wheat plants, and the mortality rate of wheat aphids was investigated 3, 7 and 10 days after the spraying. The base number of wheat aphids before the spraying and the number of live aphids after the spraying were investigated respectively, and the mortality rate was calculated.

[0070] Table 4 Control effect of Preparation Examples 1-3 and Comparative Examples 3-5 on rice planthoppers Table 5 Control effect of Preparation Examples 1-3 and Comparative Examples 3-5 on wheat aphids Referring to Tables 9-11, by comparing Preparation Examples 1-3 and Comparative Examples 3-5, it can be seen that the control effects of Preparation Examples 1-3 on rice planthoppers and wheat aphids are better than those of Comparative Examples 3-5. The ethidium bromide-dinotefuran oil suspension of the present application has better stability, which helps to continuously exert its active ingredients. Therefore, it will significantly reduce the number of drug applications in the field.

[0071] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

Claims

1. An ethiprole-dinotefuran oil suspension, characterized in that: The invention comprises the following components in parts by weight: 5-20 parts of ethidium, 6-10 parts of dinotefuran, 2-4 parts of a stabilizer, 11-15 parts of a surfactant, 2-4 parts of a thickener, and the total weight of the oil solvent is 100 parts; The stabilizer includes at least one of tert-butylhydroquinone and epoxidized soybean oil.

2. The ethiprole-dinotefuran oil suspension according to claim 1, characterized in that: The mass ratio of ethiprole to dinotefuran is 1-6:

2.

3. The ethiprole-dinotefuran oil suspension according to claim 1, characterized in that: The stabilizer is a mixture of tert-butylhydroquinone and epoxidized soybean oil.

4. The ethiprole-dinotefuran oil suspension according to claim 3, characterized in that: The mass ratio of the tertiary butyl hydroquinone to the epoxy soybean oil is 1-2:

1.

5. The ethiprole-dinotefuran oil suspension according to claim 1, characterized in that: The surfactant is selected from at least one of alkylphenol polyoxyethylene ether, oleic acid polyoxyethylene ether, castor oil polyoxyethylene ether and polyoxyethylene alcohol.

6. The ethiprole-dinotefuran oil suspension according to claim 1, characterized in that: The oil solvent includes at least one of soybean oil, corn oil, rapeseed oil, castor oil, coconut oil, palm oil, turpentine oil, methyl oleate and cottonseed oil.

7. The ethiprole-dinotefuran oil suspension according to claim 1, characterized in that: The thickener includes at least one of magnesium aluminum silicate, organic bentonite and white carbon black.

8. The method for preparing the ethiprole-dinotefuran oil suspension concentrate according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: firstly, formula amounts of ethiprole, dinotefuran, a stabilizer, a surfactant, a thickener and an oil solvent are mixed, and then the mixture is sand-milled to obtain an ethiprole-dinotefuran oil suspension.

9. The use of the ethiprole-dinotefuran oil suspension concentrate according to any one of claims 1 to 7, characterized in that: Applications include the control of rice planthoppers and wheat aphids.

10. The use of the ethiprole-dinotefuran oil suspension according to claim 9, characterized in that: The ethiprole-dinotefuran oil suspension concentrate is diluted with 40 kg of water per mu of rice or wheat, and the dosage of the ethiprole-dinotefuran oil suspension concentrate is 8-12 mL.

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