Insecticidal composition

Abstract

The invention relates to an insecticidal composition, which contains a compound as shown in formula (I), which is used as a first active ingredient, and one or more of chlorfenapyr, spirodiclofen, bifenthrin and flufenoxuron, which is used as a second active ingredient, and the weight ratio of the first active ingredient to the second active ingredient is (50: 1)-(1: 50). The insecticidal composition disclosed by the invention particularly has an excellent control effect on tetranychid mites. .

Description

[0001] This application is a divisional application of application No. 2021104795811, filed on April 30, 2021, entitled "Insecticidal composition". TECHNICAL FIELD

[0002] The present application relates to an insecticidal composition comprising, as a first active ingredient, a compound of formula (I) or a salt thereof, and, as a second active ingredient, one or more compounds selected from compounds having pest control activity or a salt thereof. The present application also relates to a method for controlling pests using the synergistic effect of the combination of the compounds. BACKGROUND

[0003] The compound of formula (I) used as the first active ingredient of the insecticidal composition of the present application is known from WO2011 / 078081. And it is described therein that it is useful for controlling pests, mites, sanitary pests, stored product pests, clothing pests, house pests, and the like. In particular, it has excellent activity against mites that are harmful to crops, sanitary aspects, etc.

[0004] The compound of formula (I)

[0005] The compounds used as the second active ingredient of the insecticidal composition of the present application are chlorfenapyr, spirobudiclofen, bifenthrin, flufenoxuron. These are all known compounds and are commercially available.

[0006] However, depending on the type of organism to be controlled, habitat characteristics, development of resistance, etc., effective control can not be possible with conventional techniques. Therefore, it is desirable to develop new techniques that can effectively control pests or mites that are difficult or impossible to control, thereby reducing the labor burden on farmers and reducing the cost of crop production.

[0007] However, it is not known whether the compound of formula (I) used as the first active ingredient, when combined with an insecticide used as the second active ingredient, has a synergistic insecticidal effect compared to the case where each compound is used alone. SUMMARY

[0008] The present application aims to solve the above problems and provides an insecticidal composition. As a result of intensive research to solve the above problems, the present application has found that the compound of formula (I) used as the first active ingredient, when combined with an insecticide used as the second active ingredient, has a significant synergistic effect, including an expansion of the target pest species, a reduction in the amount of drug used, a reduction in the number of drug treatments, etc.

[0009] The present application relates to a kind of insecticidal composition is realized by the following technical scheme:

[0010] An insecticidal composition, the composition contains as the first active ingredient using the compound of formula (I) and as the second active ingredient using one or more of chlorfenapyr, spirobudiclofen, bifenthrin, flufenoxuron, the weight ratio of the first active ingredient and the second active is 50:1-1:50.

[0011] As the first active ingredient using the compound of formula (I) and as the second active ingredient using chlorfenapyr, spirobudiclofen, bifenthrin, flufenoxuron, the weight ratio of the first active ingredient and the second active ingredient in the insecticidal composition of the present application is specific, then the synergistic effect is particularly remarkable. The weight ratio of the first active ingredient compound of formula (I) and the second active ingredient in the composition can be varied within a wide range.

[0012]

[0013] The insecticidal composition is used for the use for preventing or controlling leaf mite.

[0014] The insecticidal composition is used for the use for preventing or controlling Tetranychus urticae, Tetranychus viennensis, Tetranychus cinnabarinus, Panonychus citri, Tetranychus kanzawa kishida.

[0015] The insecticidal composition is used for the use for preventing or controlling Pentatomidae, Aphididae, Cicadellidae, Chrysomelidae, Thripidae, Plutella xylostella, Mamestra brassicae, Tortricidae, Carposinidae, Lyonetiidae.

[0016] The insecticidal composition also includes a solid or liquid carrier suitable for agricultural horticulture.

[0017] The pesticidal composition can be formulated into aqueous suspension, oily suspension, aqueous emulsion, emulsion, wettable powder, water dispersible granule, microcapsule, tablet, granule.

[0018] To prepare the pesticidal composition of the present application, it is desirable to formulate it into aqueous suspension, oily suspension, aqueous emulsion, emulsion, wettable powder, water dispersible granule, microcapsule, tablet, granule, etc. by the conventional method (e.g. mixing the compound of formula (I) and one or more second active ingredients with suitable carriers and adjuvants (e.g. emulsifiers, dispersants, stabilizers, suspending agents, penetrants, etc.).

[0019] The carriers suitable for use in the pesticidal composition of the present application can be any solid or liquid carriers commonly used in agricultural and horticultural compositions. If desired, various surfactants, stabilizers and other adjuvant ingredients can be used. In commercial formulations, the composition of the present application can also be a mixture with other active ingredients (e.g. various insecticides, acaricides, fungicides and herbicides, plant growth regulators, repellents, attractants, synergists, fertilizers and fragrances) to extend its applicability.

[0020] The pesticidal composition of the present application is particularly effective against leaf mites such as Tetranychus urticae, Tetranychus viennensis, Tetranychus cinnabarinus, Panonychus citri, Tetranychus kanzawa kishida.

[0021] Advantageously, the pesticidal composition of the present application not only has acaricidal synergistic effect against the above-mentioned leaf mites, but also simultaneously controls troublesome pests (e.g. Pentatomidae, Aphididae, Cicadellidae, Chrysomelidae, Thripidae, Plutella xylostella, Mamestra brassicae, Tortricidae, Carposinidae, Lyonetiidae, etc.) on important agricultural crops such as fruit trees (e.g. citrus, apple and pear), tea trees, vegetables, etc.

[0022] The application amount of the composition of the present application varies depending on the main conditions (e.g., population density, type and form of cultivation of the target crop, weather conditions, application method, etc.). The insecticidal composition of the present application combines rapid action and long-acting effects, and still allows effective pest control at a reduced dosage rate of the active ingredient. The insecticidal composition of the present application and reduces or avoids adverse environmental or toxicological effects.

[0023] The insecticidal composition of the present application not only includes ready-to-use compositions that can be applied to plants, seeds, soil where plants grow, with a suitable device, but also includes commercially available concentrates that must be diluted with water before application.

[0024] As a result of intensive research on an insecticidal composition, the present application has found that the compound of formula (I) used as a first active ingredient has a remarkable synergistic effect when combined with a pesticide used as a second active ingredient, including the expansion of target pest species, the reduction of the amount of drug, the reduction of the number of drug treatments, etc. DETAILED DESCRIPTION

[0025] The insecticidal composition of the present application is further illustrated in the following examples. However, these examples are not intended to limit the scope of the present application. All parts are by weight.

[0026] Preparation Example 1: Emulsion

[0027] Compound of formula (I) 20 parts

[0028] Bifenthrin 10 parts

[0029] Dimethylformamide 55 parts

[0030] Polyoxyethylene alkyl allyl ether 15 parts

[0031] The above ingredients are uniformly mixed and dissolved to obtain an emulsion.

[0032] Preparation Example 2: Wettable powder

[0033] Compound of formula (I) 40 parts

[0034] Chinomethionat 10 parts

[0035] White carbon black 10 parts

[0036] Kaolin 32 parts

[0037] Calcium lignosulfonate 8 parts

[0038] The above substances are uniformly mixed and finely pulverized to obtain a wettable powder.

[0039] Preparation Example 3: Suspension concentrate

[0040] Compound of formula (I) 5 parts

[0041] Spinetoram 25 parts

[0042] Alkyl naphthalene sulfonate formaldehyde polycondensate 5 parts

[0043] Ethylene glycol 5 parts

[0044] Xanthan gum 0.3 parts

[0045] Defoaming agent 0.2 parts

[0046] Water 59.5 parts

[0047] The active ingredient, wetting dispersant, and water are mixed and stirred uniformly to obtain a suspension slurry by pre-dispersion, and then the suspension slurry is subjected to wet milling to obtain a suspension, and then the suspension is adjusted to obtain a suspension concentrate product.

[0048] Preparation Example 4: Water dispersible granule

[0049] Compound of formula (I) 5 parts

[0050] Fluvalinate 50 parts

[0051] Sodium lignosulfonate 8 parts

[0052] Sodium dodecyl sulfate 3 parts

[0053] White carbon black 5 parts

[0054] Diatomite 29 parts

[0055] The above components are mixed, and then subjected to air flow milling to obtain a wettable powder, and then a certain amount of water is added to mix and extrude the material; after drying and sieving, a water dispersible granule is obtained.

[0056] Test Example 1

[0057] The first active ingredient, compound of formula (I), and the second active ingredient, the technical material, are respectively dissolved in acetone to prepare a mother liquor of a single agent, and then diluted to the required concentration with an aqueous solution containing 0.1% Tween-80.

[0058] When the cucumber plants grow to 4-5 true leaves, adult two-spotted spider mites are inoculated. The number of spider mites on each cucumber is recorded as the base number. After inoculation, the plants are sprayed with the test agent, and the front and back of the leaves are evenly sprayed. Each agent is repeated 4 times. Each repeat has 4 seedlings. After the test agent is dried, the plants are placed in a culture room with a temperature of (25±1) O C, a relative humidity of (70±10)%, and a light ratio L:D of 16:8. The number of surviving spider mites on each cucumber is investigated the day after treatment. A blank control is set by spraying water.

[0059] The mite reduction rate and control effect of each treatment are calculated according to the following formula:

[0060] Leaf mite reduction rate = (number of leaf mites before treatment - number of leaf mites after treatment) / number of leaf mites before treatment x 100%;

[0061] Control effect = (leaf mite reduction rate in treated area - leaf mite reduction rate in control area) / (1 - leaf mite reduction rate in control area) x 100%

[0062] In addition, the theoretical control effect (%) can be calculated by Colby formula. When the actual control effect (%) is higher than the theoretical control effect (%), the composition of the present application has a synergistic effect. The theoretical control effect (%) according to Colby formula is shown in the brackets in Tables 1-4.

[0063] Table 1

[0064]

[0065] Table 2

[0066]

[0067] Table 3

[0068]

[0069] Table 4

[0070]

[0071] From the data in Tables 1-4, it can be seen that the composition of the compound of formula (I) and the second active ingredient selected from bifenazate, spirodiclofen, bifenthrin, flufenprox has a synergistic effect on the control of T. urticae compared with the individual active ingredient.

Claims

1. An insecticidal composition, characterized in that, The composition contains a compound of formula (I) used as a first active ingredient. ， The weight ratio of the first active ingredient to the second active ingredient, flufenoxuron, used as the second active ingredient, is 50:1 to 1:

50.

2. The insecticidal composition according to claim 1, characterized in that, The composition contains a compound of formula (I) and flufenoxuron, wherein the weight ratio of the compound of formula (I) and flufenoxuron is 10:1 to 1:

50.

3. The insecticidal composition according to claim 1, characterized in that, The composition contains a compound of formula (I) and flufenoxuron, wherein the weight ratio of the compound of formula (I) and flufenoxuron is 1:1 to 1:

50.

4. The insecticidal composition according to claim 1, characterized in that, The composition contains a compound of formula (I) and flufenoxuron, wherein the weight ratio of the compound of formula (I) and flufenoxuron is 1:5 to 1:

20.

5. Use of the insecticidal composition of claim 1 for the prevention or control of spider mites.

6. The use of the insecticidal composition of claim 1 for the prevention or control of two-spotted spider mite (Tetranychus urticae), hawthorn spider mite (Tetranychus viennensis), cinnabarinus spider mite (Tetranychus cinnabarinus), citrus spider mite (Panonychus citri), and kanzawa kishida spider mite (Tetranychus kanzawa kishida).

7. The insecticidal composition of claim 1 is used for the prevention or control of psyllids (Pentatomidae), aphids (Aphididae), leafhoppers (Cicadellidae), leaf beetles (Chrysomelidae), thrips (Thripidae), diamondback moths (Plutella xylostella), cabbage loopers (Mamestra brassicae), leafrollers (Tortricidae), fruit moths (Carposinidae), and leafminers (Lyonetiidae).

8. The insecticidal composition according to claim 1, characterized in that, The insecticidal composition also includes a solid or liquid carrier suitable for agricultural and horticultural use.

9. The insecticidal composition according to claim 1, characterized in that, The insecticidal composition can be formulated into aqueous suspensions, oily suspensions, water emulsions, emulsions, wettable powders, water-dispersible granules, microcapsules, tablets, and granules.

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