Agricultural composition containing clothianidin, trifloxystrobin and metalaxyl-M

Abstract

The present invention discloses an agricultural composition containing clothianidin, trifloxystrobin, and metalaxyl-M, belonging to the technical field of pesticides. The mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M is 1.5-2.5:7-12:6-14. Within this ratio range, the agricultural composition has a preventive and control effect on rice homopteran pests and a preventive and control effect on rice blast. Indoor toxicity tests revealed that when the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M is 1.5-2:7-12:6-14, the co-toxicity coefficient against the brown planthopper is greater than 120, demonstrating a synergistic effect; the synergistic coefficient against Pyricularia oryzae is greater than 1.5, demonstrating a synergistic effect. The agricultural composition provided by the present invention can increase rice yield by 4.62-9.74%.

Description

Technical Field

[0001] The invention belongs to the technical field of pesticides and relates to an agricultural composition containing clothianidin, trifloxystrobin and metalaxyl-M. Background Art

[0002] Metalaxyl-M, also known as high-efficiency metalaxyl, belongs to the benzamide class and is highly effective against downy mildew, phytophthora, and pythium in crops such as vegetables, fruit trees, tobacco, oilseeds, cotton, and grains. It primarily inhibits ribosomal RNA synthesis in pathogenic fungi, preventing sporulation and suppressing hyphal growth. This results in nutrient deprivation and restricts normal growth and reproduction, ultimately leading to the pathogen's death.

[0003] Trifloxystrobin is a fluorine-containing fungicide from the methoxyacrylate class. It boasts high efficacy, broad spectrum, protection, treatment, eradication, penetration, systemic activity, resistance to rainwater erosion, and a long-lasting effect. As a respiratory chain inhibitor, it can kill fungi by blocking the respiratory chain, and has excellent activity against powdery mildew, rust, rust blight, net blotch, downy mildew, rice blast, damping-off, apple stinking, and rapeseed sclerotinia.

[0004] Clothianidin is a neonicotinoid insecticide characterized by broad spectrum, high efficacy, and low toxicity. It has stomach, contact, and systemic activity against insects. It selectively inhibits the nicotinic acid acetylcholinesterase receptors in the insect central nervous system, thereby blocking the normal conduction of the insect central nervous system, causing the insect to quickly stop feeding, inhibit its activity, and remain in a state of high excitement until death. Clothianidin has excellent systemic and penetrating properties. After application, it is transmitted to all parts of the plant and has excellent control effects against piercing-sucking pests such as aphids, planthoppers, leafhoppers, and whiteflies.

[0005] In recent years, the application areas of insecticides and fungicides have continued to expand. While single insecticides or fungicides are effective against certain pests or pathogens, they can be highly selective, have a narrow application range, and develop resistance with long-term use. Therefore, it is of great significance to provide a multi-component agricultural composition with a broad application range. Summary of the Invention

[0006] To develop a multi-component agricultural composition with a wide range of applications, the present invention provides an agricultural composition containing metalaxyl-M, trifloxystrobin, and clothianidin. The mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M in this agricultural composition is 1.5-2.5:7-12:6-14. Within this ratio range, the composition has control effects against rice brown planthoppers, rice blast, and rice leafhoppers, and can also increase rice yield.

[0007] Specifically, the present invention provides an agricultural composition, wherein the active ingredients of the agricultural composition are composed of clothianidin, trifloxystrobin, and metalaxyl-M, and the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M is 1.5-2.5:7-12:6-14. Preferably, the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M in the agricultural composition is 1.5-2:7-12:6-14; further preferably, the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M in the agricultural composition is 2:9.5:10.

[0008] The present invention also claims protection for the use of the above agricultural composition in controlling rice homopteran pests, which include brown planthopper and leafhopper.

[0009] Furthermore, the present invention, through indoor toxicity tests, revealed that when the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M in the agricultural composition was 1.5-2.5:7-12:6-14, it had a control effect on rice brown planthoppers, and the combined use of the agricultural composition also exhibited a synergistic effect. When the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M was 1.5-2:7-12:6-14, the co-toxicity coefficient against rice brown planthoppers was greater than 120, indicating a synergistic effect. The co-toxicity coefficient was the highest at a mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M of 2:9.5:10, reaching 168.30, indicating the optimal synergistic effect.

[0010] Furthermore, the present invention learned through field trials that the agricultural composition still has a control effect of 83.84-95.48% on rice leaf weevils 15 days after application, which is higher than the 61.49-75.53% control effect of clothianidin when used alone, the 40.35-50.98% control effect of trifloxystrobin when used alone, and the 44.72-59.86% control effect of metalaxyl when used alone. It can be seen that the combination of clothianidin, trifloxystrobin and metalaxyl-M can effectively improve the control effect of rice leaf weevils.

[0011] Furthermore, the present invention seeks to protect the use of the above agricultural composition in preventing and controlling rice blast.

[0012] Furthermore, the present invention has shown through indoor toxicity tests that the agricultural composition of clothianidin, trifloxystrobin, and metalaxyl-M has a preventive and therapeutic effect on the rice blast pathogen (Pyricularia oryzae), and also exhibits a synergistic effect. When the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M is 1.5-2:7-12:6-14, the synergistic coefficient against Pyricularia oryzae is greater than 1.5, indicating a synergistic effect. The synergistic coefficient is the highest, 3.28, when the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M is 2:9.5:10, indicating the optimal synergistic effect.

[0013] Furthermore, the present invention seeks to protect the use of the above agricultural composition in increasing rice yield.

[0014] Specifically, the present invention has learned through field tests that the agricultural composition of clothianidin, trifloxystrobin and metalaxyl-M has the effect of increasing rice yield, and after application, the rice yield is increased by 4.62-9.74%.

[0015] Compared with the prior art, the technical solution provided by the present invention has at least the following beneficial effects or advantages:

[0016] The agricultural composition provided by the present invention comprises active ingredients of clothianidin, trifloxystrobin, and metalaxyl-M. The mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M in the agricultural composition is 1.5-2.5:7-12:6-14. Within this ratio range, the composition has a control effect on rice brown planthoppers, and the agricultural composition also exhibits a synergistic effect when used in combination. When the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M is 1.5-2:7-12:6-14, the co-toxicity coefficient against rice brown planthoppers is greater than 120, indicating a synergistic effect. The co-toxicity coefficient is the highest at a mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M of 2:9.5:10, reaching 168.30, indicating the best synergistic effect.

[0017] The agricultural composition of the present invention has a preventive and therapeutic effect against the rice blast pathogen (Pyricularia oryzae), and the agricultural composition also exhibits a synergistic effect when used in combination. When the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M is 1.5-2:7-12:6-14, the synergistic coefficient against Pyricularia oryzae is greater than 1.5, demonstrating a synergistic effect. The maximum synergistic coefficient, 3.28, is achieved when the mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M is 2:9.5:10, indicating the optimal synergistic effect.

[0018] The agricultural composition of the present invention can improve the control effect of rice on leaf civets and increase rice yield. Fifteen days after application, the agricultural composition still has an 83.84-95.48% leaf civet control effect, which is higher than the 61.49-75.53% leaf civet control effect when clothianidin is used alone, the 40.35-50.98% leaf civet control effect when trifloxystrobin is used alone, and the 44.72-59.86% leaf civet control effect when metalaxyl-M is used alone. It can be seen that the combination of clothianidin, trifloxystrobin, and metalaxyl-M can effectively improve the control effect of leaf civets. The agricultural composition of clothianidin, trifloxystrobin, and metalaxyl-M also has the effect of increasing rice yield. After application, the rice yield increased by 4.62-9.74%. When the ratio range provided by the present invention is exceeded, the control effect of the agricultural composition on leaf cicada is 78.67% or 79.06% after 15 days of application. Compared with the control effect and yield when a single agent is used, the improvement effect is poor. DETAILED DESCRIPTION

[0019] The technical solutions of the present invention are described below with reference to the following examples. However, the present invention is not limited to the following examples. The experimental methods and detection methods described in each example are conventional methods unless otherwise specified; the reagents and materials described are commercially available unless otherwise specified.

[0020] Metalaxyl-M was purchased from Hubei Weideli Chemical Reagent Co., Ltd. with a purity of 99%.

[0021] Trifloxystrobin was purchased from Hubei Weideli Chemical Reagent Co., Ltd. with a purity of 95%.

[0022] Clothianidin was purchased from Shanghai Jizhi Biochemical Technology Co., Ltd. with a purity of 98%.

[0023] Example 1

[0024] This example provides a formulation of an agricultural composition comprising clothianidin, trifloxystrobin and metalaxyl-M.

[0025] 1. Suspension

[0026] The suspension concentrate containing clothianidin, trifloxystrobin and metalaxyl-M comprises 6.06 kg of metalaxyl-M, 12.63 kg of trifloxystrobin, 2.55 kg of clothianidin, 5 kg of calcium dodecylbenzenesulfonate, 3 kg of alkylnaphthalenesulfonate, 0.5 kg of glycerol, 0.8 kg of white carbon black, and the balance is made up of water.

[0027] The components were weighed according to the above parts by mass, and metalaxyl-M, trifloxystrobin, clothianidin, calcium dodecylbenzenesulfonate, alkylnaphthalenesulfonate, and white carbon were added to a frosted kettle. After grinding to a certain fineness, the materials were transferred to a stirred kettle, and the remaining glycerol and water were added. The mixture was thoroughly mixed to obtain a 20.5% suspension concentrate containing clothianidin, trifloxystrobin, and metalaxyl-M.

[0028] 2. Microemulsion

[0029] The microemulsion containing clothianidin, trifloxystrobin and metalaxyl-M comprises 8.08 kg of metalaxyl-M, 11.05 kg of trifloxystrobin, 2.24 kg of clothianidin, 0.5 kg of sodium alginate, 5 kg of isopropyl alcohol, 10 kg of Tween-80, 5 kg of Nongru 600#, 8 kg of n-butanol, and the balance is made up of water.

[0030] The components were weighed according to the above parts by mass. Metalaxyl-M, trifloxystrobin, and clothianidin were dissolved in isopropyl alcohol and n-butanol, and then uniformly mixed with Tween-80 and Nongru 600. Sodium alginate was prepared into an aqueous solution and poured into the mixed solution. The remaining water was then added and the mixture was thoroughly stirred to obtain a 20.7% microemulsion containing clothianidin, trifloxystrobin, and metalaxyl-M.

[0031] 3. Water dispersible granules

[0032] The water dispersible granules containing clothianidin, trifloxystrobin and metalaxyl-M contain 14.14 kg of metalaxyl-M, 7.37 kg of trifloxystrobin, 1.53 kg of clothianidin, 3 parts of polycarboxylate, 4 parts of sodium lauryl sulfate, 4 parts of sodium sulfate, 5 parts of starch and 54 parts of kaolin.

[0033] The components were weighed according to the above mass parts, added to a blender and mixed evenly, then pulverized in a jet mill, passed through a 600-mesh standard sieve, added to a kneader and kneaded into a plastic material, and finally the material was placed in an extrusion granulator for extrusion granulation. After granulation, the granulation was dried and sieved to obtain a water-dispersible granule containing 22.5% clothianidin, trifloxystrobin and metalaxyl-M.

[0034] Example 2

[0035] This example provides an indoor toxicity assay for agricultural compositions.

[0036] 1. Indoor toxicity test of agricultural compositions against rice brown planthopper

[0037] The experiment involved 12 treatments, namely, experiment 1: only clothianidin was added; experiment 2: only trifloxystrobin was added; experiment 3: only metalaxyl-M was added; experiment 4: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 1.5:12:6; experiment 5: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2:12:6; experiment 6: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2.5:12:6; experiment 7: clothianidin, trifloxystrobin and metalaxyl-M The mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M was 1.5:9.5:10; Test 8: The mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M was 2:9.5:10; Test 9: 2.5:9.5:10; Test 10: The mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M was 1.5:7:14; Test 11: The mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M was 2:7:14; Test 12: The mass ratio of clothianidin, trifloxystrobin, and metalaxyl-M was 2.5:7:14. The formulations used in Tests 1 to 12 were suspension concentrates, prepared according to the method described in Example 1. Each single agent and mixture was prepared in five series of mass concentrations using an equal ratio.

[0038] Rice brown planthoppers were collected from a rice planting base in Runan County, Zhumadian City, Henan Province. The collected nymphs were stabilized on rice leaves for 2 to 3 days under a constant temperature of 27±1°C indoors. Rice brown planthopper nymphs with strong vitality, similar weight, and consistent growth were selected as the insect source for bioassay. 30 μL of the prepared insecticide at different concentrations was dropped on the prothorax of the test rice brown planthopper nymphs. Each concentration gradient was a treatment, and 10 test rice brown planthopper nymphs were used in each treatment. Each treatment had 3 replicates. The treated rice brown planthopper nymphs were placed in an insect box and fresh rice leaves were placed on it. Under a constant temperature of 27±1°C indoors, the survival and death numbers of the test insects were investigated after 24 hours (the insect body was stiff, and the insect body was gently moved with a brush. If it did not move, it was counted as dead). The toxicity regression equation and LC were calculated. 50 The co-toxicity coefficient was calculated using the Sun Yunpei method, with clothianidin as the standard agent and its toxicity index (TI) as 100. The calculation results are shown in Table 1.

[0039] ATI=standard reagent LC 50 ×100 / test reagent LC 50 ;

[0040] TI of trifloxystrobin = standard reagent LC 50 ×100 / Trifloxystrobin LC 50 ;

[0041] TI of Metalaxyl-M = Standard Agent LC 50 ×100 / clothianidin LC 50 ;

[0042] TTI = TI of standard agent × percentage of standard agent in the mixed combination + TI of trifloxystrobin × percentage of agent B in the mixed combination + TI of metalaxyl-M × percentage of agent C in the mixed combination;

[0043] CTC = ATI × 100 / TTI;

[0044] In the formula, ATI is the measured toxicity index of the mixture, TTI is the theoretical toxicity index of the mixture, and CTC is the co-toxicity coefficient of the mixture. The CTC value is used to evaluate the synergistic effect of the mixture: a CTC value ≥ 120 indicates synergism, a CTC value ≤ 80 indicates antagonism, and a CTC value of 80 < CTC < 100 indicates additive effect.

[0045] Table 1: Results of indoor toxicity test of clothianidin, trifloxystrobin and metalaxyl-M combination to rice brown planthopper

[0046] Treatment group Chemical treatment <![CDATA[LC 50 / (mg / L)]]> TI ATI TTI CTC Test 1 Clothianidin (A) 8.75 100.0 - - - Test 2 Trifloxystrobin (B) 2583.56 0.34 - - - Test 3 Metalaxyl(C) 1930.21 0.45 - - - Test 4 A:B:C=1.5:12:6 87.62 - 9.99 8.04 124.21 Test 5 A:B:C=2:12:6 58.92 - 14.85 10.34 143.62 Test 6 A:B:C=2.5:12:6 45.12 - 19.39 12.53 154.75 Test 7 A:B:C=1.5:9.5:10 72.15 - 12.13 7.51 161.52 Test 8 A:B:C=2:9.5:10 53.82 - 16.26 9.66 168.30 Test 9 A:B:C=2.5:9.5:10 45.68 - 19.15 11.72 163.40 Test 10 A:B:C=1.5:7:14 94.75 - 9.23 7.05 130.99 Test 11 A:B:C=2:7:14 70.94 - 12.33 9.07 135.94 Test 12 A:B:C=2.5:7:14 68.40 - 12.79 11.01 116.19

[0047] As shown in Table 1, when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 1.5-2:7-12:6-14, the co-toxicity coefficients against rice brown planthopper were all greater than 120, showing a synergistic effect. Among them, the co-toxicity coefficient of clothianidin, trifloxystrobin and metalaxyl-M was the largest, reaching 168.30, when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2:9.5:10, indicating the best synergistic effect.

[0048] 2. Indoor toxicity determination of agricultural compositions against Pyricularia oryzae

[0049] The mycelial growth inhibition method was used to determine the toxicity of each test group of fungicides to the rice blast fungus Pyricularia oryzae (purchased from Shanghai Guyan Industrial Co., Ltd.), with three replicates per group. The Wadley method was used to determine the synergistic effect of the fungicides. The rice pear spores propagated on PDA medium were punched into bacterial cakes with a 0.65 cm diameter puncher and inoculated into a culture dish (R = 9 cm) containing a mixture of PDA medium (9 mL) and acetone-diluted original drug (1 mL) using a sterile operation method. The culture dish with sterile water was used as a control. The inoculated culture dish was placed in a constant temperature incubator at a temperature of 28 ± 0.5 ° C and cultured every 48, 72, and 96 hours. When the colonies in the control culture dish grew close to the edge of the culture dish, the colony diameter (mm) was measured using the cross-cross method. Each colony was measured twice, and the average value was taken to calculate the inhibition rate of each treatment. A linear regression analysis was performed between the logarithm of the drug concentration (x) and the inhibition rate (Y) to obtain the toxicity regression equation and correlation coefficient (r), and then the effective inhibitory concentration (EC) was obtained. 50 ), calculate the expected effective inhibitory concentration (EC 50exp ) and synergistic coefficient (SR), the calculation results are shown in Table 2.

[0050] Inhibition rate (%) = [(colony diameter of control group - colony diameter of treatment group) / (colony diameter of control group - punch diameter)] × 100

[0051] EC 50exp =(a+b+c) / [(a / EC 50A )+(b / EC 50B )+(c / EC 50C )]

[0052] SR=EC 50exp / EC 50实际

[0053] In the formula, a is the percentage of clothianidin in the agricultural composition, b is the percentage of trifloxystrobin in the agricultural composition, c is the percentage of metalaxyl-M in the agricultural composition, EC 50A is the toxicity index of clothianidin (A) used alone, EC 50B is the toxicity index of trifloxystrobin (B) used alone, EC50C The toxicity index of metalaxyl-M (C) used alone. SR ≥ 1.5 indicates synergistic effect, SR ≤ 0.5 indicates antagonistic effect, and 0.5 < CTC value < 1.5 indicates additive effect.

[0054] The experiment involved 12 treatments, namely, experiment 13: only adding clothianidin; experiment 14: only adding trifloxystrobin; experiment 15: only adding metalaxyl-M; experiment 16: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 1.5:12:6; experiment 17: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2:12:6; experiment 18: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2.5:12:6; experiment 19: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2.5:12:6. The mass ratio of metalaxyl is 1.5:9.5:10; Test 20: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 2:9.5:10; Test 21: 2.5:9.5:10; Test 22: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 1.5:7:14; Test 23: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 2:7:14; Test 24: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 2.5:7:14.

[0055] Table 2: Indoor toxicity test of clothianidin, trifloxystrobin and metalaxyl-M against Pyricularia oryzae

[0056] Treatment group Chemical treatment <![CDATA[EC 50实际 / (mg / L)]]> <![CDATA[EC 50exp / (mg / L)]]> SR Test 13 Clothianidin (A) 35.62 - - Test 14 Trifloxystrobin (B) 5.35 - - Test 15 Metalaxyl(C) 18.33 - - Test 16 A:B:C=1.5:12:6 3.64 7.46 2.05 Test 17 A:B:C=2:12:6 2.73 7.61 2.79 Test 18 A:B:C=2.5:12:6 2.71 7.76 2.86 Test 19 A:B:C=1.5:9.5:10 2.94 8.89 3.02 Test 20 A:B:C=2:9.5:10 2.76 9.04 3.28 Test 21 A:B:C=2.5:9.5:10 3.16 9.20 2.91 Test 22 A:B:C=1.5:7:14 4.75 10.64 2.24 Test 23 A:B:C=2:7:14 5.97 10.81 1.81 Test 24 A:B:C=2.5:7:14 8.19 10.97 1.34

[0057] As shown in Table 2, when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 1.5-2:7-12:6-14, the synergistic coefficient against Pyricularia oryzae was greater than 1.5, showing a synergistic effect; among them, the synergistic coefficient was the largest, which was 3.28, when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2:9.5:10, indicating the best synergistic effect.

[0058] Example 3

[0059] This example provides a field test of an agricultural composition.

[0060] 1. Field test of the efficacy of agricultural composition in controlling rice leaf weeds

[0061] The experiment involved a total of 21 treatments, namely, Experiment 25: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2.5:12:6; Experiment 26: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2.2:10.5:8; Experiment 27: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2.0:9.5:10; Experiment 28: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 1.8:8.5:12; Experiment 29: the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 1.5:7:14; Experiments 30-34: only clothianidin was added; Experiments 35-39: only trifloxystrobin was added; Experiments 40-44: only metalaxyl-M was added; Experiment 45: an equal amount of water was added, which served as the blank control group. The formulation used in Tests 25 to 44 was a microemulsion, the preparation method of which was the same as that in Example 1. The formulation was diluted 600 times before use, and the application rate was 60 kg / mu.

[0062] The experiment was conducted in a rice experimental field in Xiayi County, Henan Province. The rice variety was Yunongjing No. 11, sown on May 12. Before the experiment, ridges were formed and plots were drawn. Each plot had an area of ​​20 m 2 Each treatment was repeated 3 times and arranged in random blocks. A backpack sprayer was used for uniform spraying. The rice was in the tillering stage when the pesticide was applied. The base number of insect population was investigated by the pot-patting method before application. The number of live insects on the leaves was investigated 3, 7, and 15 days after application. The parallel jumping line method was used to randomly investigate 9 points in each plot, and 5 holes were tapped at each point. The insect population was counted by the pot-patting method to calculate the control effect.

[0063] Control effect (%) = [1-(CK0×PT1) / (CK1×PT0)]×100

[0064] In the formula, PT0 is the number of insects in the treatment area before pesticide application; PT1 is the number of insects in the treatment area after pesticide application; CK0 is the number of insects in the blank control area before pesticide application; CK1 is the number of insects in the blank control area after pesticide application.

[0065] Table 3: Field test results of clothianidin, trifloxystrobin and metalaxyl-M combined with phytoplankton

[0066]

[0067]

[0068] As shown in Table 3, the agricultural composition provided by the present invention still has an 83.84-95.48% leaf cicada control effect 15 days after application, which is higher than the 61.49-75.53% leaf cicada control effect when clothianidin is used alone, the 40.35-50.98% leaf cicada control effect when trifloxystrobin is used alone, and the 44.72-59.86% leaf cicada control effect when metalaxyl-M is used alone. It can be seen that the compound use of clothianidin, trifloxystrobin and metalaxyl-M can effectively improve the control effect of leaf cicada. The agricultural composition of clothianidin, trifloxystrobin and metalaxyl-M also has the effect of increasing rice yield. After application, the rice yield increased by 4.62-9.74%. After exceeding the ratio range provided by the present invention, the control effect of the agricultural composition on rice leaf cicada after 15 days of application was 78.67% or 79.06%, which is poorer than the control effect and yield when used as a single agent.

[0069] The embodiments described above are some of the embodiments of the present invention, rather than all of them. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments obtained without creative effort and through deduction and substitution by a person of ordinary skill in the art based on the concept of the present invention are within the scope of protection of the present invention.

Claims

1. An agricultural composition, characterized in that The active ingredients are composed of clothianidin, trifloxystrobin and metalaxyl-M; The mass ratio of clothianidin, trifloxystrobin and metalaxyl-M in the agricultural composition is 2:9.5:

10.

2. Use of the agricultural composition according to claim 1 in controlling rice homopteran pests.

3. The use according to claim 2, characterized in that The Homoptera pests are brown planthopper and leafhopper.

4. Use of the agricultural composition according to claim 1 in preventing and controlling rice blast.

5. Use of the agricultural composition according to claim 1 in increasing rice yield.

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