Agricultural composition containing clothianidin, trifloxystrobin and metalaxyl-M

Abstract

The invention discloses an agricultural composition containing clothianidin, trifloxystrobin and metalaxyl-M, and belongs to the technical field of pesticides. The mass ratio of clothianidin to trifloxystrobin to metalaxyl-M is (1.5-2.5): (7-12): (6-14), and within the proportioning range, the agricultural composition has a prevention and treatment effect on rice homoptera pests and has a prevention and treatment effect on rice blast. An indoor toxicity test shows that when the mass ratio of clothianidin to trifloxystrobin to metalaxyl-M is (1.5-2): (7-12): (6-14), the co-toxicity coefficients of clothianidin, trifloxystrobin and metalaxyl-M on rice brown planthopper are all greater than 120, and a synergistic interaction effect is shown; the synergistic coefficient on the pyricularia oryzae is greater than 1.5, and a synergistic effect is shown. The agricultural composition provided by the invention can improve the rice yield, and the improvement effect is 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 has a highly effective control effect on downy mildew, phytophthora, and pythium in vegetables, fruit trees, tobacco, oilseeds, cotton, grains, etc. It mainly inhibits the synthesis of ribosomal RNA in pathogenic fungi, prevents fungal spore production, inhibits hyphae growth, causes nutritional deficiency of pathogens, and restricts normal growth, development, and reproduction, thus leading to the death of pathogens.

[0003] Trifloxystrobin is a fluorine-containing fungicide belonging to the methoxyacrylate class, with the characteristics of high efficiency, broad spectrum, protection, treatment, eradication, penetration, systemic activity, resistance to rain erosion, and long lasting effect. It has the characteristics of a respiratory chain inhibitor, and can kill fungi by blocking the respiratory chain process. It has good activity against powdery mildew, rust, rust, net blight, downy mildew, rice blast, damping-off, apple black smell, and rapeseed sclerotinia.

[0004] Clothianidin is a neonicotinoid insecticide with the characteristics of broad spectrum, high efficiency and low toxicity. It has stomach poison, contact killing and systemic activity against pests. It can selectively inhibit 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 activities, and remain in a state of high excitement until death. Clothianidin has excellent systemic and penetrating effects. After application, it is transmitted to all parts of the plant and has a good preventive effect on piercing-sucking pests such as aphids, planthoppers, leafhoppers, whiteflies, etc.

[0005] In recent years, the application area of ​​insecticides and fungicides has been expanding. A single type of insecticide or fungicide has a good control effect on certain pests or pathogens, but it has the problems of strong selectivity, narrow application range, and drug resistance after long-term use. Therefore, it is of great significance to provide a multi-compound agricultural composition with a wide application range. Summary of the invention

[0006] In order to develop a multi-component agricultural composition with a wide application range, the present invention provides an agricultural composition containing metalaxyl-M, trifloxystrobin and clothianidin. The mass ratio of clothianidin, trifloxystrobin and metalaxyl-M in the agricultural composition is 1.5-2.5:7-12:6-14, and within the ratio range, the composition has a control effect on rice brown planthopper, rice blast and rice leaf cicada, and can also increase the yield of rice.

[0007] Specifically, the present invention provides an agricultural composition, wherein the active ingredients in 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 to protect the use of the above agricultural composition in controlling rice homopteran pests, which include brown planthopper and leaf cicada.

[0009] Furthermore, the present invention has learned through indoor toxicity tests that when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M in the agricultural composition is 1.5-2.5:7-12:6-14, it has a control effect on rice brown planthoppers, and the compound use of the agricultural composition also has a synergistic effect. When the compound mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 1.5-2:7-12:6-14, the co-toxicity coefficient to rice brown planthoppers is greater than 120, showing a synergistic effect; among them, when the compound mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 2:9.5:10, the co-toxicity coefficient is the largest, which is 168.30, and the synergistic effect is optimal.

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

[0011] In addition, 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 learned 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 has a synergistic effect. When the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 1.5-2:7-12:6-14, the synergistic coefficient for Pyricularia oryzae is greater than 1.5, showing a synergistic effect; when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 2:9.5:10, the synergistic coefficient is the largest, which is 3.28, and the synergistic effect is optimal.

[0013] Furthermore, the present invention claims 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, and the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M in the agricultural composition is 1.5-2.5:7-12:6-14, and the composition has a control effect on rice brown planthopper within the ratio range, and the agricultural composition also has a synergistic effect when used in combination. When the composite mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 1.5-2:7-12:6-14, the co-toxicity coefficient to rice brown planthopper is greater than 120, showing a synergistic effect; wherein the co-toxicity coefficient is the largest when the composite mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 2:9.5:10, which is 168.30, and the synergistic effect is optimal.

[0017] The agricultural composition of the present invention has a preventive and therapeutic effect on the rice blast pathogen (Pyricularia oryzae), and the agricultural composition has 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 on Pyricularia oryzae is greater than 1.5, showing a synergistic effect; when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M is 2:9.5:10, the synergistic coefficient is the largest, which is 3.28, and the synergistic effect is optimal.

[0018] The agricultural composition of the present invention can improve the control effect of rice on rice leaf cicada and increase rice yield. After 15 days of application, the agricultural composition still has an 83.84-95.48% control effect on rice leaf cicada, 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-M when used alone. It can be seen that the compound use of clothianidin, trifloxystrobin and metalaxyl-M can effectively improve the control effect of rice leaf cicada. The agricultural composition of clothianidin, trifloxystrobin and metalaxyl-M also has the effect of increasing rice yield. After application, the rice yield is increased by 4.62-9.74%. When the ratio is beyond the range provided by the present invention, 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 scheme of the present invention is described below in conjunction with the embodiments, but the present invention is not limited to the following embodiments. The experimental methods and detection methods described in each embodiment are conventional methods unless otherwise specified; the reagents and materials described are all commercially available unless otherwise specified.

[0020] Metalaxyl 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 embodiment provides a formulation of an agricultural composition of clothianidin, trifloxystrobin and metalaxyl-M.

[0025] 1. Suspension

[0026] The suspension 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] Weigh each component according to the above mass parts, add metalaxyl-M, trifloxystrobin, clothianidin, calcium dodecylbenzenesulfonate, alkylnaphthalenesulfonate and white carbon into a frosting kettle, grind to a certain fineness, transfer the material to a stirring kettle, add the remaining glycerol and water, and mix thoroughly to obtain a 20.5% suspension 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 isopropanol, 10 kg of Tween-80, 5 kg of agricultural milk 600#, 8 kg of n-butanol, and the balance is supplemented by water.

[0030] Weigh each component according to the above mass parts, dissolve metalaxyl-M, trifloxystrobin and clothianidin in isopropanol and n-butanol, and mix them evenly with Tween-80 and Nongru 600, prepare sodium alginate into an aqueous solution and pour it into the above mixed solution, then add the remaining water, and stir thoroughly 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 comprise 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] Weigh each component according to the above mass proportion, add the material into a blender and mix evenly, then grind it into powder by a jet mill, pass it through a 600-mesh standard sieve, add it into a kneader and knead it into a plastic material, finally put the material into an extrusion granulator for extrusion granulation, and after granulation, dry and sieve to obtain a water-dispersible granule containing 22.5% of clothianidin, trifloxystrobin and metalaxyl-M.

[0034] Example 2

[0035] This example provides an indoor toxicity assay of an agricultural composition.

[0036] 1. Indoor toxicity test of agricultural composition 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 preparation type used in Tests 1 to 12 was a suspension, and the preparation method was referred to Example 1. Each single agent and mixture was configured with 5 series of mass concentrations according to the equal ratio method.

[0038] Rice brown planthoppers were collected from the rice planting base in Runan County, Zhumadian City, Henan Province. The collected nymphs were stabilized with rice leaves for 2 to 3 days under the constant temperature of 27±1℃ indoors. The rice brown planthopper nymphs with strong vitality, similar weight and consistent growth were selected as the insect source for bioassay. 30μL of prepared insecticides of different concentrations were dropped on the prothorax of the tested rice brown planthopper nymphs. Each concentration gradient was a treatment, and 10 tested rice brown planthopper nymphs were used in each treatment. Each treatment was repeated 3 times. The treated rice brown planthopper nymphs were placed in an insect box and fresh rice leaves were placed in the box. Under the constant temperature of 27±1℃ indoors, the survival and death 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 recorded as dead), and 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 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 compound. The CTC value is used to judge the synergistic effect of the mixture. CTC values ​​≥ 120 are synergistic, CTC values ​​≤ 80 are antagonistic, and 80 < CTC values ​​< 100 are additive.

[0045] Table 1: Results of indoor toxicity test of clothianidin, trifloxystrobin and metalaxyl-M against 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 to rice brown planthopper were all greater than 120, showing a synergistic effect; among them, when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2:9.5:10, the co-toxicity coefficient was the largest, which was 168.30, indicating that the synergistic effect was optimal.

[0048] 2. Indoor toxicity test of agricultural composition against Pyricularia oryzae

[0049] The mycelium growth inhibition method was used to determine the toxicity of the fungicides in each test group to the rice blast fungus Pyricularia oryzae (purchased from Shanghai Guyan Industrial Co., Ltd.), with each group repeated three times. The Wadley method was used to determine the synergistic effect of the fungicides. The rice pear spore fungus propagated on the PDA medium was punched into a bacterial cake with a 0.65 cm diameter puncher, and was inoculated into a culture dish (R = 9 cm) containing a mixture of PDA medium (9 mL) and the original drug (1 mL) diluted with acetone 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. It was observed every 48, 72, and 96 hours. When the colony in the control culture dish grew close to the edge of the culture dish, the colony diameter (mm) was measured by the 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 inhibition concentration (EC 50 ), calculate the expected effective inhibitory concentration (EC 50exp ) and the SR, the calculation results are shown in Table 2.

[0050] Antibacterial rate (%) = [(colony diameter of control group - colony diameter of treatment group) / (colony diameter of control group - diameter of puncher)] × 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 content percentage of clothianidin in the agricultural composition, b is the content percentage of trifloxystrobin in the agricultural composition, c is the content 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 It is the toxicity index of metalaxyl (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 clothianidin was added; experiment 14: only trifloxystrobin was added; experiment 15: only metalaxyl was added; experiment 16: the mass ratio of clothianidin, trifloxystrobin and metalaxyl was 1.5:12:6; experiment 17: the mass ratio of clothianidin, trifloxystrobin and metalaxyl was 2:12:6; experiment 18: the mass ratio of clothianidin, trifloxystrobin and metalaxyl was 2.5:12:6; experiment 19: the mass ratio of clothianidin, trifloxystrobin and metalaxyl 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 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, when the mass ratio of clothianidin, trifloxystrobin and metalaxyl-M was 2:9.5:10, the synergistic coefficient was the largest, which was 3.28, indicating that the synergistic effect was optimal.

[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 clean water was added, which was the blank control group. The formulation type used in Tests 25 to 44 was a microemulsion, the preparation method was referred to Example 1, and it was used after being diluted 600 times, 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, which was 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 in random block arrangement, and 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, and 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 phytosporin

[0066]

[0067]

[0068] As shown in Table 3, the agricultural composition provided by the present invention still has a leaf control effect of 83.84-95.48% 15 days after application, which is higher than the leaf control effect of 61.49-75.53% when clothianidin is used alone, the leaf control effect of 40.35-50.98% when trifloxystrobin is used alone, and the leaf control effect of 44.72-59.86% 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 mites. The agricultural composition of clothianidin, trifloxystrobin and metalaxyl-M also has the effect of increasing rice yield, and the rice yield is increased by 4.62-9.74% after application. Beyond the ratio range provided by the present invention, the control effect of the agricultural composition on rice leaf mites after 15 days of application is 78.67% or 79.06%, which is poor compared with the control effect and yield when a single agent is used.

[0069] The embodiments described above are part of the embodiments of the present invention, rather than all of the embodiments. The detailed description of the embodiments of the present invention is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. All other embodiments obtained without creative work and related deductions and substitutions made by ordinary technicians in the field under the conditions of the concept of the present invention belong to 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 1.5-2.5:7-12:6-14.

2. The agricultural composition according to claim 1, characterized in that The mass ratio of clothianidin, trifloxystrobin and metalaxyl-M in the agricultural composition is 1.5-2:7-12:6-14.

3. The agricultural composition according to claim 2, characterized in that The mass ratio of clothianidin, trifloxystrobin and metalaxyl-M in the agricultural composition is 2:9.5:

10.

4. Use of the agricultural composition according to any one of claims 1 to 3 in controlling rice homopteran pests.

5. The use according to claim 4, characterized in that: The Homoptera pests include brown planthopper and leafhopper.

6. Use of the agricultural composition according to any one of claims 1 to 3 in preventing and controlling rice blast.

7. Use of the agricultural composition according to any one of claims 1 to 3 in increasing rice yield.

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