Pesticide composition containing trifluorocide and application of pesticide composition

Abstract

The invention belongs to the technical field of pesticides, and particularly relates to a pesticide composition containing trifluorocide, which comprises a component A and a component B. The component A is thymol; and the component B is trifluorocide. The compound nematicidal composition can significantly improve nematicidal activity, can be processed into missible oil, granules, an emulsion in water, an aqueous solution and other common dosage forms applied in the agricultural field, is used for preventing and treating nematode diseases of vegetable crops, grain crops and fruit trees, has the advantages of low dosage and prominent effect, can delay the problem of drug resistance of existing chemical agents, and can be used for preventing and treating the nematode diseases of the vegetable crops, the grain crops and the fruit trees. The safety requirements of pesticide preparations are met.

Description

[0001] This application is a divisional application of Chinese patent application 202310171215.9, filed on February 27, 2023, with the invention name “A pesticide composition of triflumuron and its application”. Technical Field

[0002] The invention relates to the technical field of pesticides, and in particular to a pesticide composition containing triflumuron and application thereof. Background Art

[0003] Root-knot nematode disease is one of the important crop diseases caused by nematodes of the genus Meloidogyne spp. Root-knot nematodes can infect more than 3,000 plant species. Among them, there are vegetables, grains, cash crops, fruit crops and ornamental plants. Crops infected by root-knot nematodes can reduce production by 10% to 20% at the mildest, and by more than 75% at the worst. The economic losses caused worldwide reach billions of dollars each year. In my country, with the increase in the area of ​​vegetable cultivation in protected areas, especially since the large-scale promotion of solar greenhouses, the multiple cropping index has increased, and the serious continuous cropping has provided a suitable environment for the occurrence and development of root-knot nematode disease, allowing root-knot nematodes to accumulate and proliferate in the soil, becoming an important disease that endangers my country's crop production. At present, the prevention and control of root-knot nematodes is mainly based on chemical agents. However, with the increasing prominence of environmental problems and pesticide residues on crops, reducing the use of chemical pesticides has become a trend.

[0004] Using plants, microorganisms or their metabolites to control vegetable root-knot nematodes can reduce pesticide residues and is conducive to the sustainable development of agricultural production. Patent CN103416400A discloses the use of trans-aconitic acid (CAS: 4023-65-8) in controlling plant root-knot nematodes. The concentration used for southern root-knot nematodes is 100-1000ug / mL, and the optimal concentration is 500ug / mL; Li Xiaoman et al. (2017, Journal of Beijing Agricultural College), Liu Qingan et al. (2008, Journal of Nanjing Agricultural University) and others studied the effect of jasmonic acid on root-knot nematodes. The experiment showed that jasmonic acid can affect the development of nematodes. Summary of the invention

[0005] In order to solve the problem of difficult nematode control, the present invention provides a pesticide composition containing triflumuron, which solves the problem of resistance risk when using chemical pesticides alone, and at the same time, can significantly reduce the dosage of pesticides, and also has a significant improvement effect on crop growth and fruit quality.

[0006] The present invention provides a pesticide composition, which comprises component A and component B (active ingredient);

[0007] Wherein, the component A is selected from any one, two or more of trans-aconitic acid, jasmonic acid and thymol; and the component B is triflupromide.

[0008] In some technical solutions, the mass ratio of component A to component B is 80-1:1-80, preferably 20-1:1-20, and further preferably 20-10:5-10, for example 20:10, 10:5.

[0009] In some technical solutions, the weight percentage of component A and component B in the pesticide composition is 1-95%, preferably 10-75%, and more preferably 15-50%, such as 30%, 15%.

[0010] In some technical solutions, the pesticide composition further includes agriculturally acceptable adjuvants and / or carriers.

[0011] In some technical schemes, the auxiliary agent and / or carrier includes a filler, a surfactant, etc., for example, one, two or more of a dispersant, a wetting agent, an emulsifier, a solvent, a thickener, an antifreeze agent, an adhesive, a disintegrant, a foaming agent, a defoaming agent, a penetrant, a stabilizer, and a carrier.

[0012] In some technical solutions, the formulation of the pesticide composition is selected from liquid formulations and solid formulations, such as soluble solutions, water emulsions, emulsifiable concentrates, aqueous solutions, granules, etc. Among them, the liquid formulation is drip-irrigated or flushed, and the solid formulation is broadcasted.

[0013] In some technical schemes, the dosage form of the pesticide composition is a granule; preferably, the granule comprises the following components: component B, component A, alkyl naphthalene sulfonate, fatty alcohol polyoxyethylene ether sulfate, white carbon black, polyvinyl alcohol, ammonium sulfate, magnesium stearate, and kaolin.

[0014] In some technical schemes, the granules include the following components: component B, trans-aconitic acid, alkylnaphthalene sulfonate, fatty alcohol polyoxyethylene ether sulfate, white carbon, polyvinyl alcohol, ammonium sulfate, magnesium stearate, and kaolin; preferably, the granules include the following components: 5 parts of component B, 10 parts of trans-aconitic acid, 3 parts of alkylnaphthalene sulfonate, 2 parts of fatty alcohol polyoxyethylene ether sulfate, 5 parts of white carbon, 2 parts of polyvinyl alcohol, 5 parts of ammonium sulfate, 5 parts of magnesium stearate, and 63 parts of kaolin.

[0015] In some technical schemes, the granules include the following components: component B, jasmonic acid, alkyl naphthalene sulfonate, fatty alcohol polyoxyethylene ether sulfate, white carbon, polyvinyl alcohol, ammonium sulfate, magnesium stearate, and kaolin; preferably, the granules include the following components: 5 parts of component B, 10 parts of jasmonic acid, 3 parts of alkyl naphthalene sulfonate, 2 parts of fatty alcohol polyoxyethylene ether sulfate, 5 parts of white carbon, 2 parts of polyvinyl alcohol, 5 parts of ammonium sulfate, 5 parts of magnesium stearate, and 63 parts of kaolin.

[0016] In some technical schemes, the granules include the following components: component B, thymol, alkyl naphthalene sulfonate, fatty alcohol polyoxyethylene ether sulfate, white carbon black, polyvinyl alcohol, ammonium sulfate, magnesium stearate, and kaolin; preferably, the granules include the following components: 5 parts of component B, 10 parts of thymol, 3 parts of alkyl naphthalene sulfonate, 2 parts of fatty alcohol polyoxyethylene ether sulfate, 5 parts of white carbon black, 2 parts of polyvinyl alcohol, 5 parts of ammonium sulfate, 5 parts of magnesium stearate, and 63 parts of kaolin.

[0017] In some technical schemes, the dosage form of the pesticide composition is a soluble solution; preferably, the soluble solution includes the following components: component B, component A, secondary alcohol polyoxyethylene ether, polyoxyethylene alkylamine, propylene glycol, and N-methylpyrrolidone.

[0018] In some technical schemes, the soluble agent includes the following components: component B, trans-aconitic acid, secondary alcohol polyoxyethylene ether, polyoxyethylene alkylamine, propylene glycol, and N-methylpyrrolidone; preferably, the soluble agent includes the following components: 10 parts of component B, 20 parts of trans-aconitic acid, 8 parts of secondary alcohol polyoxyethylene ether, 1 part of polyoxyethylene alkylamine, 20 parts of propylene glycol, and 41 parts of N-methylpyrrolidone.

[0019] In some technical schemes, the soluble agent includes the following components: component B, jasmonic acid, secondary alcohol polyoxyethylene ether, polyoxyethylene alkylamine, propylene glycol, and N-methylpyrrolidone; preferably, the soluble agent includes the following components: 10 parts of component B, 20 parts of jasmonic acid, 8 parts of secondary alcohol polyoxyethylene ether, 1 part of polyoxyethylene alkylamine, 20 parts of propylene glycol, and 41 parts of N-methylpyrrolidone.

[0020] In some technical schemes, the soluble agent includes the following components: component B, thymol, secondary alcohol polyoxyethylene ether, polyoxyethylene alkylamine, propylene glycol, and N-methylpyrrolidone; preferably, the soluble agent includes the following components: 10 parts of component B, 20 parts of thymol, 8 parts of secondary alcohol polyoxyethylene ether, 1 part of polyoxyethylene alkylamine, 20 parts of propylene glycol, and 41 parts of N-methylpyrrolidone.

[0021] In some technical schemes, the dosage form of the pesticide composition is an emulsifiable concentrate; preferably, the emulsifiable concentrate comprises the following components: component B, component A, fatty alcohol polyoxyethylene ether, triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, cyclohexanone, anhydrous ethanol, and solvent oil.

[0022] In some technical schemes, the emulsifiable concentrate includes the following components: component B, jasmonic acid, fatty alcohol polyoxyethylene ether, triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, cyclohexanone, anhydrous ethanol, and solvent oil; preferably, the emulsifiable concentrate includes the following components: 10 parts of component B, 20 parts of jasmonic acid, 6 parts of fatty alcohol polyoxyethylene ether, 2 parts of triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, 20 parts of cyclohexanone, 5 parts of anhydrous ethanol, and 37 parts of solvent oil.

[0023] In some technical schemes, the emulsifiable concentrate includes the following components: component B, trans-aconitic acid, fatty alcohol polyoxyethylene ether, triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, cyclohexanone, anhydrous ethanol, and solvent oil; preferably, the emulsifiable concentrate includes the following components: 10 parts of component B, 20 parts of trans-aconitic acid, 6 parts of fatty alcohol polyoxyethylene ether, 2 parts of triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, 20 parts of cyclohexanone, 5 parts of anhydrous ethanol, and 37 parts of solvent oil.

[0024] In some technical schemes, the emulsifiable concentrate includes the following components: component B, thymol, fatty alcohol polyoxyethylene ether, triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, cyclohexanone, anhydrous ethanol, and solvent oil; preferably, the emulsifiable concentrate includes the following components: 10 parts of component B, 20 parts of thymol, 6 parts of fatty alcohol polyoxyethylene ether, 2 parts of triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, 20 parts of cyclohexanone, 5 parts of anhydrous ethanol, and 37 parts of solvent oil.

[0025] The present invention also provides the use of the above pesticide composition, which is used to control plant diseases and insect pests, preferably to control plant nematodes, such as root-knot nematodes, stem nematodes (such as decay stem nematodes), cyst nematodes, root rot nematodes and pine wood nematodes.

[0026] In some technical solutions, the pesticide composition can be used for soil treatment during the plant seedling stage or before transplanting the seedlings.

[0027] In some technical schemes, the plants include vegetables, fruit trees, economic crops, garden trees, etc.; vegetables such as: tomatoes, cucumbers, loofahs, gourds, peas, peppers, chili peppers, lettuce, potatoes, celery, etc.; fruit trees such as: citrus, oranges, grapefruits, lemons, bananas, sugar cane, mangoes, pineapples, litchis, guavas, durian, etc.; economic crops such as: cotton, cocoa, coffee, peanuts, tobacco, corn, soybeans, etc.; garden trees such as: fir trees, pine trees, etc.

[0028] The present invention also provides a method for preparing the above-mentioned pesticide composition, which is prepared by conventional methods in the pesticide field; for example, by mixing the active ingredient with a filler (i.e., a liquid solvent and / or a solid carrier) and selecting a suitable surfactant (i.e., an emulsifier and / or a dispersant and / or a foaming agent and / or a penetrant and / or a stabilizer).

[0029] Beneficial effects:

[0030] The pesticide composition provided by the present invention uses trifluoxetine in combination with trans-aconitic acid, jasmonic acid or thymol, with low dosage and outstanding effect, and can delay the drug resistance problem of existing chemical agents, meeting the safety requirements of pesticide preparations. The pesticide composition provided by the present invention has a significantly improved lethal effect on root-knot nematodes, significantly improves crop growth and fruit quality, enhances plant vitality, increases crop yield, and delays the generation of resistance. DETAILED DESCRIPTION

[0031] The technical scheme of the present invention will be further described in detail below in conjunction with specific embodiments. It should be understood that the following embodiments are only exemplary descriptions and explanations of the present invention and should not be construed as limiting the scope of protection of the present invention. All technologies implemented based on the above content of the present invention are included in the scope that the present invention is intended to protect.

[0032] Unless otherwise specified, the raw materials and reagents used in the following examples are commercially available or can be prepared by known methods.

[0033] Example 1

[0034] The nematicidal composition is a soluble solution composed of the following ingredients: 10% of triflupromide, 20% of trans-aconitic acid, 8% of secondary alcohol polyoxyethylene ether, 1% of polyoxyethylene alkylamine, 20% of propylene glycol, and N-methylpyrrolidone as a supplement.

[0035] Example 2

[0036] The nematicidal composition is a soluble solution composed of the following ingredients: 10% of triflupromide, 20% of jasmonic acid, 8% of secondary alcohol polyoxyethylene ether, 1% of polyoxyethylene alkylamine, 20% of propylene glycol, and N-methylpyrrolidone as a supplement.

[0037] Example 3

[0038] The nematicidal composition is a soluble solution composed of the following ingredients: 10% of triflumuron, 20% of thymol, 5% of dioctyl phthalate, 5% of polyoxyethylene hexitol anhydride, 20% of n-butanol, 10% of N,N-dimethylformamide, and supplemented by dimethyl sulfoxide.

[0039] Example 4

[0040] The nematicidal composition is a granule composed of the following ingredients: 5% of triflupromide, 10% of jasmonic acid, 3% of alkylnaphthalene sulfonate, 2% of fatty alcohol polyoxyethylene ether sulfate, 5% of white carbon black, 2% of polyvinyl alcohol, 5% of ammonium sulfate, 5% of magnesium stearate, and supplemented by kaolin.

[0041] Example 5

[0042] The nematicidal composition is a granule composed of the following ingredients: 5% of trifluprost, 10% of trans-aconitic acid, 3% of alkylnaphthalene sulfonate, 2% of fatty alcohol polyoxyethylene ether sulfate, 5% of white carbon black, 2% of polyvinyl alcohol, 5% of ammonium sulfate, 5% of magnesium stearate, and supplemented by kaolin.

[0043] Example 6

[0044] The nematicidal composition is a granule composed of the following ingredients: 5% of triflumuron, 10% of thymol, 3% of alkylnaphthalene sulfonate, 2% of fatty alcohol polyoxyethylene ether sulfate, 5% of white carbon black, 2% of polyvinyl alcohol, 5% of ammonium sulfate, 5% of magnesium stearate, and supplemented by kaolin.

[0045] Example 7

[0046] The nematicidal composition is an emulsifiable concentrate composed of the following ingredients: 10% of triflupromide, 20% of jasmonic acid, 6% of fatty alcohol polyoxyethylene ether, 2% of triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, 20% of cyclohexanone, 5% of anhydrous ethanol, and solvent oil as a supplement.

[0047] Example 8

[0048] The nematicidal composition is an emulsifiable concentrate composed of the following ingredients: 10% of triflupromide, 20% of trans-aconitic acid, 6% of fatty alcohol polyoxyethylene ether, 2% of triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, 20% of cyclohexanone, 5% of anhydrous ethanol, and solvent oil as a supplement.

[0049] Example 9

[0050] The nematicidal composition is an emulsifiable concentrate composed of the following ingredients: 10% of triflupromide, 20% of thymol, 8% of fatty alcohol polyoxyethylene ether, 3% of triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, 20% of dimethyl sulfoxide, and solvent oil as a supplement.

[0051] Test Example 1 Indoor Test

[0052] 1. Test methods

[0053] Refer to NY / T 1833.1-2009 "Guidelines for Indoor Bioassay Tests of Pesticides - Nematicides" Part 1: Insect immersion method for inhibition of plant pathogenic nematodes.

[0054] On the basis of the concentration range of the agent determined in the preliminary test, the test agent was diluted with an aqueous solution containing 0.1% TW80 into 5-7 series of concentrations, and the same dose of acetone was diluted with an aqueous solution containing 0.1% TW80 as a control. The collected nematodes were made into a suspension with clean water (about 200 / mL), and 0.5mL of the drug solution and 0.5mL of the nematode suspension were transferred with a pipette into a 2mL counting dish. Repeat 3 times, mix with a thin glass rod and place in a 25°C constant temperature incubator. After 48 hours, the drug solution in the counting dish was filtered out and only the nematodes were retained. 1mL of 2% sodium chloride solution was added and kept for 2 minutes. The nematodes with stiff bodies were dead, and the live nematodes were curled or twisted. The number of dead and live nematodes was checked, and the mortality rate and corrected mortality rate were calculated. Statistical analysis was performed using DPS statistical analysis software, and the LC of each agent was calculated. 50 To evaluate the nematicidal activity of each agent, and calculate the co-toxicity coefficient (CTC value) of the mixture according to Sun Peiyun's method.

[0055] Mortality rate = number of dead nematodes / number of treated nematodes × 100%

[0056] Corrected mortality rate = (treatment mortality rate - control mortality rate) / (100 - control mortality rate) × 100%

[0057] Measured toxicity index (ATI) = (standard agent LC 50 / Test reagent LC 50 )×100

[0058] Theoretical toxicity index (TTI) = toxicity index of agent A × percentage of A in the mixture + toxicity index of agent B × percentage of B in the mixture + toxicity index of agent C × percentage of C in the mixture

[0059] Co-toxicity coefficient (CTC) = [Actual toxicity index (ATI) of the mixture / Theoretical toxicity index (TTI) of the mixture] × 100

[0060] According to the classification standard of combined effects: a co-toxicity coefficient (CTC) ≥ 120 indicates a synergistic effect; a co-toxicity coefficient (CTC) ≤ 80 indicates an antagonistic effect; and a co-toxicity coefficient (CTC) of 80 < 120 indicates an additive effect.

[0061] 2. Test results

[0062] Table 1 Test results of the inhibitory activity of the nematicidal compositions of Examples 1 to 3, 7 to 9 on the second instar larvae of root-knot nematodes

[0063] Active ingredients Regression equation <![CDATA[LC 50 (mg / L)]]> Co-toxicity coefficient effect Trifloxystrobin y=1.8830+2.7467x 13.64 - - trans-aconitic acid y=0.9106+1.7182x 239.87 - - Example 1 y=3.0486+2.0411x 9.04 406.47 Increase efficiency Example 8 y=2.9701+2.1753x 8.57 428.76 Increase efficiency Jasmonic acid y=0.9210+1.5881x 370.19 - - Example 2 y=2.3498+2.5015x 11.47 332.30 Increase efficiency Example 7 y=2.3425+2.5012x 11.55 330.00 Increase efficiency Thymol y=0.0227+2.2477x 163.84 - - Example 3 y=3.2180+1.9208x 8.47 414.19 Increase efficiency Example 9 y=3.1783+1.9516x 8.58 408.88 Increase efficiency

[0064] It can be seen from the data in Table 1 that the nematicidal composition of the present invention has a good control effect on the second-instar larvae of nematodes, and the two compounds can play a good synergistic role.

[0065] Test Example 2 Field efficacy test

[0066] Test Agents: Examples 1 to 9

[0067] Test crop: cucumber

[0068] Target of control: root-knot nematodes

[0069] Active ingredient dosage: 1.5 kg / hectare

[0070] Disease index survey and prevention effectiveness survey methods:

[0071] The diseased roots of cucumber root knots were crushed and mixed with 9 times the weight of wet sand to prepare the root-knot nematode inoculum. When the cucumbers were planted, the inoculum was about 180 kg / hm2. -2 The amount of granules was applied into the holes for artificial inoculation. There were two application methods. One was to apply the granules to the holes of individual cucumber plants before planting. The other was to water the seedlings after planting and irrigate the roots with the agent 7 days after planting. No other nematode agents were applied during the experiment.

[0072] One month after the application of the pesticide, the height, stem diameter, chlorophyll content (measured by a chlorophyll meter), length, diameter, and sugar content (measured by a sugar meter) of the cucumbers in each treatment were investigated, and then the yield was measured for one month. Two months after the application of the pesticide, the root-knot nematode damage was investigated. The grading method of the root-knot nematode damage is as follows: Level 0: healthy seedlings without disease (no root knots on the root system); Level 1: less than 10% of the roots have root knots, but the root knots are not connected to each other; Level 2: 11% to 30% of the roots have root knots, and only a small number of root knots are connected to each other; Level 3: 31% to 50% of the roots have root knots, and less than half of the root knots are connected to each other; Level 4: 51% to 75% of the roots have root knots, more than half of the root knots are connected to each other, and some of the main and lateral roots become thicker and deformed; Level 5: more than 75% of the roots have root knots, and they are connected to each other, and most of the main and lateral roots become thicker and deformed.

[0073]

[0074] During the harvest period, the single cucumber fruit weight, fruit length, fruit diameter, yield and sugar content were measured.

[0075] Test results:

[0076] Table 2 Field efficacy of the nematicidal compositions of Examples 1 to 9 in controlling cucumber root-knot nematodes and plant growth potential

[0077]

[0078]

[0079] Table 3 Field yield and fruit quality of the nematicidal compositions of Examples 1 to 9 for controlling cucumber root-knot nematodes

[0080]

[0081] It can be seen from Tables 2 and 3 that the combination of triflumuron and various pesticides can significantly improve the control effect of root-knot nematodes, increase the plant height, stem thickness, chlorophyll content, etc. of cucumber plants, increase cucumber yield, and improve cucumber quality.

[0082] Test Example 3 Field efficacy test

[0083] Test Agents: Examples 1 to 9

[0084] Test crop: Tomato

[0085] Target of control: root-knot nematodes

[0086] Active ingredient dosage: 1.5 kg / hectare

[0087] Methods for disease index survey and prevention effectiveness survey:

[0088] The diseased roots of tomato root knots were crushed and mixed with 9 times the weight of wet sand to prepare the root-knot nematode inoculum. When planting tomatoes, the inoculum was inoculated at about 180 kg / hm2. -2 The amount of granules was applied into the holes for artificial inoculation. There were two application methods. One was to apply the granules to the holes of individual tomatoes before planting. The other was to water the seedlings after planting and irrigate the roots with the agent 7 days after planting. No other nematode agents were applied during the experiment.

[0089] One month after the application of the pesticide, the plant height, stem thickness, and chlorophyll content (measured by a chlorophyll meter) of each treatment tomato were investigated. Two months after the application of the pesticide, the root-knot nematode damage was investigated. The grading method of root-knot nematode damage is as follows: Level 0: healthy seedlings without disease (no root knots on the root system); Level 1: less than 10% of the root system has root knots, but the root knots are not connected to each other; Level 2: 11% to 30% of the root system has root knots, and only a small number of root knots are connected to each other; Level 3: 31% to 50% of the root system has root knots, and less than half of the root knots are connected to each other; Level 4: 51% to 75% of the root system has root knots, more than half of the root knots are connected to each other, and some of the main and lateral roots become thicker and deformed; Level 5: more than 75% of the root system has root knots, and they are connected to each other, and most of the main and lateral roots become thicker and deformed.

[0090]

[0091] During the harvest period, the weight, yield and sugar content of single tomato fruits were measured.

[0092] Test results:

[0093] Table 4 Field efficacy of the nematicidal compositions of Examples 1 to 9 in controlling tomato root-knot nematodes and plant growth potential

[0094]

[0095]

[0096] Table 5 Field yield and fruit quality of the nematicidal compositions of Examples 1 to 9 for controlling tomato root-knot nematodes

[0097]

[0098] It can be seen from Tables 4 and 5 that after triflumuron is compounded with various agents, the control effect on root-knot nematodes can be significantly improved, the plant height, stem thickness, chlorophyll content, etc. of tomato plants can be increased, the tomato yield can be increased, and the tomato quality can be improved.

[0099] Test Example 4 Field efficacy test

[0100] Test Agents: Examples 1 to 9

[0101] Test crop: Potato

[0102] Target of control: Ditylenchus destructans

[0103] Active ingredient dosage: 1.5 kg / hectare

[0104] Methods for disease index survey and prevention effectiveness survey:

[0105] The diseased potatoes of potato stem nematode were crushed and mixed with 9 times the weight of wet sand to prepare the stem nematode inoculum. When planting potatoes, the inoculum was added at a rate of about 150 kg·hm -2 The amount of pesticide was applied into the holes for artificial inoculation. When planting potatoes, after water seepage, the treatment agent was mixed with fine sand and applied into the holes. No pesticide treatment was carried out during the trial.

[0106] During the potato harvest period, the damage caused by the stem nematode was investigated. The damage caused by the stem nematode is graded as follows: Level 0, no damage; Level 1, the tubers are damaged, and the diseased area accounts for less than 25% of the tuber area; Level 2: the diseased area accounts for 25% to 50% of the tuber area; Level 3: the diseased area accounts for 50% to 75% of the tuber area; Level 4: the diseased area accounts for more than 75% of the tuber area.

[0107]

[0108] Test results:

[0109] Table 6 Field control efficacy of the nematicidal compositions of Examples 1 to 9 against Ditylenchus destructor on potatoes

[0110]

[0111]

[0112] It can be seen from Table 6 that the combination of triflumuron and various pesticides can significantly improve the control effect on potato stem nematodes.

[0113] Test Example 5 Field efficacy test

[0114] Test Agents: Examples 1 to 9

[0115] Test crop: soybean

[0116] Target: Cyst nematodes

[0117] Active ingredient dosage: 1.5 kg / hectare

[0118] Methods for disease index survey and prevention effectiveness survey:

[0119] Soybean roots were collected from the plots infected with soybean cyst nematodes, crushed and mixed with 9 times the weight of wet sand to prepare the cyst nematode inoculum. Before soybean sowing, the inoculum was irrigated at a rate of about 150 kg hm -2 The amount of pesticide was applied into the holes for artificial inoculation. When soybeans were sown, the treatment agent was mixed with fine sand and applied in holes. No pesticide treatment was carried out during the experiment.

[0120] 50 days after sowing, 5 sampling points were used, and 300 g of roots and soil around the roots of 2 intact soybean plants were collected at each point to investigate the number of soybean cyst nematode cysts in the roots and the soil around the roots and the total number of second-instar (J2), third-instar (J3), and fourth-instar (J4) larvae in the roots.

[0121] Test results:

[0122] Table 7 Field efficacy of the nematicidal compositions of Examples 1 to 9 in controlling cyst nematodes on soybean

[0123]

[0124] It can be seen from Table 7 that the combination of triflumuron and various pesticides can significantly improve the control effect on soybean cyst nematode.

[0125] From the time of application to the end of the investigation, no visible phytotoxic symptoms were found in the crops produced by the formulations of the examples, and the crops grew well after application, indicating that the trifluoxetine composition can effectively control the damage of root-knot nematodes. It can be judged that under the same control effect, the dosage is less than that of the control agent, indicating that the present invention can effectively reduce the amount of pesticides used, reduce the production cost of crops, increase crop yields, reduce pesticide residues on crops, and reduce the degree of environmental pollution.

[0126] The above is an explanation of the embodiments of the present invention. However, the present invention is not limited to the above embodiments. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pesticide composition, comprising component A and component B; in, The component A is thymol; the component B is trifluanid.

2. The pesticide composition according to claim 1, characterized in that The mass ratio of component A to component B is 80-1:1-80, preferably 20-1:1-20, more preferably 20-10:5-10, for example 20:10, 10:5; And / or, the weight percentage of component A and component B in the pesticide composition is 1-95%, preferably 10-75%, more preferably 15-50%, such as 30%, 15%.

3. The pesticide composition according to claim 1 or 2, characterized in that: The pesticide composition further includes agriculturally acceptable adjuvants and / or carriers; preferably, the adjuvants and / or carriers include fillers, surfactants, etc., for example, one, two or more of dispersants, wetting agents, emulsifiers, solvents, thickeners, antifreeze agents, adhesives, disintegrants, foaming agents, defoamers, penetrants, stabilizers, and carriers.

4. The pesticide composition according to any one of claims 1 to 3, characterized in that The dosage form of the pesticide composition is selected from liquid dosage form and solid dosage form, such as soluble solution, water emulsion, emulsifiable concentrate, aqueous solution, granule and the like.

5. The pesticide composition according to claim 4, characterized in that The pesticide composition is in the form of granules; Preferably, the granules include the following components: component B, thymol, alkylnaphthalene sulfonate, fatty alcohol polyoxyethylene ether sulfate, white carbon black, polyvinyl alcohol, ammonium sulfate, magnesium stearate, kaolin; More preferably, the granules include the following components: 5 parts of component B, 10 parts of thymol, 3 parts of alkyl naphthalene sulfonate, 2 parts of fatty alcohol polyoxyethylene ether sulfate, 5 parts of white carbon black, 2 parts of polyvinyl alcohol, 5 parts of ammonium sulfate, 5 parts of magnesium stearate, and 63 parts of kaolin.

6. The pesticide composition according to claim 4, characterized in that The pesticide composition is in the form of a soluble solution; Preferably, the soluble solution comprises the following components: component B, thymol, secondary alcohol polyoxyethylene ether, polyoxyethylene alkylamine, propylene glycol, N-methylpyrrolidone; More preferably, the soluble solution comprises the following components: 10 parts of component B, 20 parts of thymol, 8 parts of secondary alcohol polyoxyethylene ether, 1 part of polyoxyethylene alkylamine, 20 parts of propylene glycol, and 41 parts of N-methylpyrrolidone.

7. The pesticide composition according to claim 4, characterized in that The pesticide composition is in the form of an emulsifiable concentrate; Preferably, the emulsifiable concentrate comprises the following components: component B, thymol, fatty alcohol polyoxyethylene ether, triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, cyclohexanone, anhydrous ethanol, solvent oil; More preferably, the emulsifiable concentrate comprises the following components: 10 parts of component B, 20 parts of thymol, 6 parts of fatty alcohol polyoxyethylene ether, 2 parts of triphenyl phenol polyoxyethylene ether phosphate triethanolamine salt, 20 parts of cyclohexanone, 5 parts of anhydrous ethanol, and 37 parts of solvent oil.

8. Use of the pesticide composition according to any one of claims 1 to 7, wherein the pesticide composition is used for controlling plant diseases and insect pests, preferably controlling plant nematodes, such as root-knot nematodes, stem nematodes (such as Ditylenchus destructans), cyst nematodes, root rot nematodes and pine wood nematodes; Preferably, the pesticide composition can be used for soil treatment during the plant seedling stage or before the seedlings are transplanted; Preferably, the plants include vegetables, fruit trees, economic crops, garden trees, etc.; vegetables such as tomatoes, cucumbers, loofahs, gourds, peas, bell peppers, chili peppers, lettuce, potatoes, celery, etc.; fruit trees such as citrus, oranges, grapefruits, lemons, bananas, sugar cane, mangoes, pineapples, litchis, guavas, durian, etc.; economic crops such as cotton, cocoa, coffee, peanuts, tobacco, corn, soybeans, etc.; garden trees such as fir trees, pine trees, etc.

9. A method for preparing the pesticide composition according to any one of claims 1 to 7, wherein the preparation is carried out by conventional methods in the field of pesticides; for example, by mixing the active ingredient with a filler (i.e., a liquid solvent and / or a solid carrier) and selecting a suitable surfactant (i.e., an emulsifier and / or a dispersant and / or a foaming agent and / or a penetrant and / or a stabilizer).

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