Insecticide composition and application thereof

Abstract

The invention relates to the technical field of insecticides, in particular to an insecticide composition and application thereof. Wherein the insecticide composition is prepared from the following components: the flufenamid and the flonicamid; the mass ratio of the flufenamid to the flonicamid is (10: 1)-(1: 10). The insecticide composition has high combined toxicity to mouthparts of piercing-sucking pests such as aphids, the dosage of field insecticides can be reduced, and the development of insecticide resistance of the piercing-sucking mouthpart pests to the insecticides can be slowed down.

Description

Technical Field

[0001] The present invention relates to the technical field of pesticides, and in particular to a pesticide composition and application thereof. Background Art

[0002] Long-term use of a single insecticide chemical component can easily lead to increased resistance in pests, which in turn will lead to an increasing amount of pesticides used. In theory, this problem can be solved by developing new pesticides, but the cost of developing new pesticides is high and the development cycle is long. In practice, they often cannot keep up with the speed at which pests develop resistance.

[0003] To address this problem, existing technologies also use methods such as adjusting crop layout and rotating different pesticides to slow down the increase of pest resistance, but the actual effect is also limited. If pesticides with different ingredients are compounded, it can not only improve the control effect and expand the insecticide range, but also effectively slow down the problem of increasing pest resistance. Summary of the invention

[0004] In view of the above-mentioned deficiencies in the prior art, the object of the present invention is to provide a pesticide composition and its application, aiming to solve the technical problems of increased pesticide resistance of pests and increased dosage in the prior art.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A first aspect of the present invention provides an insecticide composition, comprising thiamethoxam and flonicamid; the mass ratio of thiamethoxam to flonicamid is 10:1 to 1:10.

[0007] The insecticide composition, wherein the mass ratio of the anthracenamide to the flonicamid is 1:1.

[0008] The insecticide composition comprises the following components by weight percentage: 15% to 25% of methamphetamide and flonicamid, 2% to 4% of polycarboxylate dispersant, 0.5% to 1.5% of sulfonate dispersant, 0.5% to 1.5% of wetting agent, 3% to 7% of antifreeze agent, 0.1% to 0.2% of thickener, 0.3% to 0.7% of defoamer, 0.1% to 0.3% of pH regulator, and the balance is water.

[0009] The insecticide composition comprises the following components, calculated by weight percentage: 10% of methamphetamide, 10% of flonicamid, 3% of polycarboxylate dispersant, 1% of sulfonate dispersant, 1% of wetting agent, 5% of antifreeze agent, 0.15% of thickener, 0.5% of defoamer, 0.2% of pH regulator, and the balance is water.

[0010] The insecticide composition, wherein the wetting agent includes at least one of polyoxyethylene-polyoxypropylene block copolymers, vegetable oil ethylene oxide adducts and derivatives, fatty alcohol polyoxyethylene ethers, fatty acid polyoxyethylene ethers, and modified alkyl sodium sulfates.

[0011] The insecticide composition, wherein the antifreeze agent includes at least one of ethylene glycol, glycerol and urea.

[0012] The insecticide composition, wherein the thickener comprises at least one of xanthan gum, magnesium aluminum silicate and hydroxyethyl cellulose.

[0013] The insecticide composition, wherein the pH adjuster comprises at least one of citric acid and glacial acetic acid.

[0014] The second aspect of the present invention provides the use of the insecticide composition in controlling piercing-sucking mouthpart pests.

[0015] The third aspect of the present invention provides use of the insecticide composition in controlling aphids.

[0016] Beneficial effects: The present invention provides an insecticide composition, which adopts two insecticides with different action mechanisms, namely, flubendiamide and anthracene, as active ingredients. Within a specific ratio range, the insecticide composition has high combined toxicity to piercing-sucking mouthparts pests such as aphids and whiteflies, can reduce the amount of insecticides used in the field, and slow down the development of insecticide resistance of piercing-sucking mouthparts pests. DETAILED DESCRIPTION

[0017] The present invention provides an insecticide composition and its application. In order to make the purpose, technical scheme and effect of the present invention clearer and more specific, the present invention is further described in detail with reference to the following examples. It should be understood that the specific examples described herein are only used to explain the present invention and are not used to limit the present invention.

[0018] The invention provides an insecticide composition, comprising methipridafenamide and flonicamid; the mass ratio of methipridafenamide to flonicamid is 10:1 to 1:10.

[0019] Of the above two components, cypermethrin has excellent performance and good systemic conductivity. It is mainly used for field crops such as fruit trees, vegetables, legumes, cotton, cereals, potatoes, and can also be used for flowers and ornamental plants. It is mainly used to control Lepidoptera (striped stem borer, beet armyworm, diamondback moth, fall armyworm, etc.), Coleoptera (beetles, corn root leaf beetles, potato leaf beetles, yellow leaf beetles, etc.), Diptera (flies, mosquitoes, vegetable leafminers, etc.), Hemiptera (aphids, planthoppers, psyllids, whiteflies, etc.), Thysanoptera (thrips, orchid thrips, palm thrips, tobacco thrips, etc.), Isoptera (termites, etc.), cockroaches, ants and other pests, especially aphids, whiteflies, psyllids and other piercing-sucking mouthparts pests have a high control effect.

[0020] Flunicromethamine has good penetration and is effective against various piercing-sucking mouthparts pests. It can penetrate from the roots of plants to the stems and leaves, but its penetration from leaves to the stems and roots is relatively weak. Flunicromethamine works by hindering the sucking action of pests. After the pests ingest the drug, they stop sucking quickly and eventually die of starvation.

[0021] The combined use of sulfamethoxam and flubendiamide has a synergistic effect. When sulfamethoxam and flubendiamide are mixed in an effective mass ratio of 10:1 to 1:10, they show obvious synergistic effects in controlling aphids and whiteflies in vegetable fields.

[0022] Preferably, the mass ratio of thiamethoxam to flonicamid is 1: 1. At this mass ratio, the synergistic effect of prevention and control is more obvious.

[0023] Preferably, the insecticide composition comprises the following components by weight percentage: 15% to 25% of oxathiapiprolin and flonicamid, 2% to 4% of polycarboxylate dispersant, 0.5% to 1.5% of sulfonate dispersant, 0.5% to 1.5% of wetting agent, 3% to 7% of antifreeze agent, 0.1% to 0.2% of thickener, 0.3% to 0.7% of defoamer, 0.1% to 0.3% of pH adjuster, and the balance is water. The use of wetting agent can significantly reduce the surface tension of the liquid medicine, make the medicine particles wet quickly, and make the liquid medicine easy to wet and spread on the surface of the application target, helping the medicine to penetrate. Polycarboxylate dispersant and sulfonate dispersant can prevent the aggregation of solid particles in the solid-liquid dispersion system in the processing of pesticide preparations, so that it can remain uniformly dispersed in the liquid phase for a long time. The addition of thickeners can enhance the stability of pesticides, reduce stratification and sedimentation, ensure the durability of the efficacy, and make pesticides easier to adhere to the surface of plants, thereby improving efficacy.

[0024] Preferably, the insecticide composition comprises the following components in percentage by weight: 10% of methamphetamide, 10% of flonicamid, 3% of polycarboxylate dispersant, 1% of sulfonate dispersant, 1% of wetting agent, 5% of antifreeze agent, 0.15% of thickener, 0.5% of defoamer, 0.2% of pH regulator, and the balance is water.

[0025] Preferably, the wetting agent includes at least one of polyoxyethylene-polyoxypropylene block copolymers, vegetable oil ethylene oxide adducts and derivatives, fatty alcohol polyoxyethylene ethers, fatty acid polyoxyethylene ethers, and modified alkyl sodium sulfates.

[0026] Preferably, the antifreeze agent includes at least one of ethylene glycol, glycerol and urea.

[0027] Preferably, the thickener includes at least one of xanthan gum, magnesium aluminum silicate, and hydroxyethyl cellulose.

[0028] Preferably, the pH adjuster includes at least one of citric acid and glacial acetic acid.

[0029] The preparation method of the insecticide composition comprises the following steps:

[0030] First, a polycarboxylate dispersant, a sulfonate dispersant, a wetting agent, an antifreeze agent, a thickener, a defoamer, a pH regulator and water are uniformly mixed by high-speed shearing, and the active ingredients of imipenem and flonicamid are added, and the mixture is ball-milled in a sand mill for 2 to 3 hours to make the particle diameters all below 5 mm, thereby obtaining the insecticide composition.

[0031] Example 1

[0032] An insecticide composition, comprising the following components by weight percentage: 20% of methamphetamide and flonicamid, 3% of polycarboxylate dispersant, 1% of sulfonate dispersant, 1% of wetting agent, 5% of antifreeze agent, 0.15% of thickener, 0.5% of defoamer, 0.2% of pH value regulator, and the balance is water;

[0033] The mass ratio of oxathiapiprole to flonicamid is 10:1.

[0034] Example 2

[0035] A pesticide composition, which differs from Example 1 in that the mass ratio of oxathiapiprole to flonicamid is 5:1.

[0036] Example 3

[0037] A pesticide composition, which differs from Example 1 in that the mass ratio of oxathiapiprole to flonicamid is 2:1.

[0038] Example 4

[0039] A pesticide composition, which is different from Example 1 in that the mass ratio of the anthracene amide to the flonicamid is 1:1.

[0040] Example 5

[0041] A pesticide composition, which is different from Example 1 in that the mass ratio of the anthracenamide to the flonicamid is 1:2.

[0042] Example 6

[0043] A pesticide composition, which differs from Example 1 in that the mass ratio of oxathiapiprole to flonicamid is 1:5.

[0044] Example 7

[0045] A pesticide composition, which differs from Example 1 in that the mass ratio of oxathiapiprole to flonicamid is 1:10.

[0046] The insecticide compositions of Examples 1-7 were subjected to indoor toxicity tests on aphid adults: The toxicity tests on aphid adults were conducted in glass finger tubes. The specific operation process is as follows: 2 mL of 1.8% to 2% agar was spread on the bottom of the glass finger tube, and after the agar solidified, the water vapor on the tube wall was wiped off with absorbent paper. The leaves of the un-pesticide-treated, flat, insect-free cabbage seedlings were collected, and circular leaves with a diameter of 2 cm were punched out with a hole puncher, and the thick veins were avoided as much as possible. After the liquid medicine was prepared, each circular leaf was immersed in liquid medicine of different concentrations for 10 seconds, and after drying at room temperature, it was flatly attached to the bottom of the tube with the front side facing down. Wingless adult aphids of basically the same shape and size were selected with a brush, 20 to 35 heads per tube, and cotton plugs were inserted into 2 / 3 of the tube length, keeping a distance of not less than 15 mm from the leaves. Then, the finger-shaped tubes were placed upside down in a light incubator, the temperature was set at 25±1°C, the photoperiod was 16h:8h (L:D), and the number of dead and alive aphids in each tube was checked after 48h.

[0047] The results are shown in Table 1:

[0048] Table 1 Results of toxicity test of oxathiapiprolin and flonicamid against aphids

[0049]

[0050] As can be seen from the above table, among the monomer compounds, the insecticide flonicamid has a better killing effect on cabbage aphids, and its LC50 value is 26.48mg / L. The mixture of thiamethoxam and flonicamid in different ratios showed certain insecticidal activity against cabbage aphids; the CTC values ​​of each ratio were greater than 120, showing a synergistic effect, which also showed that the combination of thiamethoxam and flonicamid had no antagonistic effect on cabbage aphids. It shows that when the mass ratio of thiamethoxam and flonicamid is 10:1 to 1:10, it shows a synergistic effect on cabbage aphids, has excellent insecticidal effect, can effectively reduce the dosage of monomer active ingredients, and slow down the development of resistance of cabbage aphids. Among them, when the mass ratio of thiamethoxam: flonicamid is 1:1, the LC50 value is the lowest and the CTC is the highest, and the combined use effect is the best.

[0051] The experimental results show that the combination of fenthiocarb and flonicamid showed high insecticidal activity against cabbage aphids and exhibited a synergistic effect; and the influence of the mixing ratio selection on the insecticidal activity of the mixture was higher than that of the active ingredients of the insecticide.

[0052] Field test on the efficacy of a combination of fenthiocarb and flonicamid against cucumber aphids

[0053] Test method: Field efficacy determination on aphids, both the test agent and the control agent were sprayed. Use a backpack manual sprayer for spraying, the sprayer capacity is 15L, and the flow rate is 0.2-0.4L / min. The number of surviving aphid adults in each treatment area was investigated 1d, 3d, and 7d after the drug was applied. Five random sampling points were selected in each treatment area, and two plants were investigated at each point, for a total of 10 plants. The top five new leaves of each plant were marked, and the number of aphid adults was investigated on the marked leaves to calculate the control effect of each agent treatment area.

[0054] The formula for calculating the control effect is as follows:

[0055]

[0056]

[0057] Where: PT0 is the number of live insects in the treatment area before the drug is applied;

[0058] PT1 is the number of live insects in the pesticide-treated area after the pesticide treatment;

[0059] CK0 is the number of live worms in the blank control area before medication;

[0060] CK1 is the number of live worms in the blank control area after drug administration;

[0061] PT is the insect population reduction rate in the area treated with pesticides;

[0062] CK is the insect population reduction rate in the blank control area.

[0063] The test results are shown in Table 2:

[0064] Table 2

[0065]

[0066]

[0067] In Table 2, the data of control effect (%) have different letters (a, b, c), indicating that there is a statistical difference between the two groups.

[0068] From the results in Table 2, it can be seen that the insecticide composition of Example 4 exhibits excellent control effect on cucumber aphids, and the control effect is significantly better than that of 10% flonicamid suspension and 120 g / L methoprene soluble solution.

[0069] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of the present invention, and all these changes or substitutions should fall within the protection scope of the claims attached to the present invention.

Claims

1. An insecticide composition, characterized in that: The invention comprises oxathiapiprole and flonicamid; the mass ratio of oxathiapiprole to flonicamid is 10:1 to 1:

10.

2. The insecticide composition according to claim 1, characterized in that The mass ratio of oxathiapiprole to flonicamid is 1:

1.

3. The insecticide composition according to claim 1 or 2, characterized in that: Calculated by weight percentage, the composition includes: 15% to 25% of oxathiapiprole and flonicamid, 2% to 4% of polycarboxylate dispersant, 0.5% to 1.5% of sulfonate dispersant, 0.5% to 1.5% of wetting agent, 3% to 7% of antifreeze agent, 0.1% to 0.2% of thickener, 0.3% to 0.7% of defoaming agent, 0.1% to 0.3% of pH regulator, and the balance is water.

4. The insecticide composition according to claim 3, characterized in that Calculated by weight percentage, the composition includes: 10% of oxathiapiprole, 10% of flonicamid, 3% of polycarboxylate dispersant, 1% of sulfonate dispersant, 1% of wetting agent, 5% of antifreeze agent, 0.15% of thickener, 0.5% of defoamer, 0.2% of pH adjuster, and the balance is water.

5. The insecticide composition according to claim 3, characterized in that The wetting agent includes at least one of polyoxyethylene-polyoxypropylene block copolymers, vegetable oil ethylene oxide adducts and derivatives, fatty alcohol polyoxyethylene ethers, fatty acid polyoxyethylene ethers, and modified alkyl sodium sulfate.

6. The insecticide composition according to claim 3, characterized in that The antifreeze agent includes at least one of ethylene glycol, glycerol and urea.

7. The insecticide composition according to claim 3, characterized in that The thickener includes at least one of xanthan gum, magnesium aluminum silicate and hydroxyethyl cellulose.

8. The insecticide composition according to claim 3, characterized in that The pH adjuster includes at least one of citric acid and glacial acetic acid.

9. Use of the insecticide composition according to any one of claims 1 to 8 in controlling piercing-sucking mouthpart pests.

10. Use of the insecticide composition according to any one of claims 1 to 8 in controlling aphids.

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