Application of insecticidal composition containing cyantraniliprole and thiamethoxam in control of brontispa longissima

Abstract

The invention belongs to the technical field of betel nut pest control, and provides an application of an insecticidal composition containing cyantraniliprole and thiamethoxam in control of brontispa longissima, the insecticidal composition comprises pesticide active ingredients, the pesticide active ingredients are cyantraniliprole and thiamethoxam, the mass ratio of cyantraniliprole to thiamethoxam is 1: 5-6: 1, and the pesticide active ingredients are pesticide active ingredients containing cyantraniliprole and thiamethoxam. The composition is used for preventing and controlling brontispa longissima After the two pesticides with the cyantraniliprole and the thiamethoxam as the effective components are compounded and combined, the pesticide composition has a remarkable synergistic interaction effect on brontispa longissima, has outstanding fast-acting property and lasting period of preventing and controlling the brontispa longissima, can effectively reduce the pesticide dosage and frequency, reduces the pesticide use cost, and has a remarkable effect on preventing and controlling the brontispa longissima and preventing and controlling the brontispa longissima. Meanwhile, generation of drug resistance of brontispa longissima on plants can be delayed; compared with an existing single-component insecticide, the insecticidal composition containing cyantraniliprole and thiamethoxam has the advantages that the insecticidal effect is obvious, the synergistic interaction effect is achieved, and the insecticidal composition containing cyantraniliprole and thiamethoxam is safe to crops and worthy of application and popularization in agricultural production.

Description

Technical Field

[0001] The invention relates to the technical field of betel nut pest control, in particular to application of an insecticide composition containing cyantraniliprole and thiamethoxam for controlling coconut palm leaf beetles. Background Art

[0002] Areca catechu L. is an evergreen tree of the Magnoliaceae, Primitales, Palmaceae, and Areca genus. It has an upright, tree-like stem, more than 10 meters high, up to 30 meters high, with obvious annular leaf scars, monoecious, with many branches in the inflorescence, oblong ovary, oblong or ovoid fruit, and ovate seeds. The flowering and fruiting period is March-April. Areca catechu is a warm and hot positive plant that likes high temperature, abundant rainfall and humid climate. It is commonly found scattered in the low valley bottom, ridge foot, slope foot and plain stream side of tropical monsoon forest secondary forest, and also grows in patches in valleys rich in humus, mountain ridges, sparse forests and slightly acidic to neutral sandy loam barren mountains and wilderness. The most suitable temperature is 10-36℃, the lowest temperature is not lower than 10℃, the highest temperature is not higher than 40℃, and it can grow well in areas with an altitude of 0-1000 meters and an annual rainfall of 1700-2000 mm. The harvesting period of Hainan betel nut is generally from August to around April of the following year; the fruits can be harvested when they reach 24-32 pieces / kg.

[0003] Diseases that are prone to occur in betel nut trees include leaf spot, leaf blight, anthracnose, blight, ear blight, bacterial leaf streak, bud rot, and yellowing. The main insect pests are red-veined ear borer, leafhopper, aphid, whitefly, scale insect, red spider, and coconut leaf beetle. The coconut leaf beetle harms the heart of betel nut. The conventional treatment method is to cut off the heart leaf at a 45° angle from bottom to top with a sharp knife without affecting the growth point, and then wrap 20g of trichlorfon in cloth and place it on the growth point for dripping to kill the insects.

[0004] Coconut leaf beetle (Brontispa longissima Gestro) belongs to the order Coleoptera, family Hispidae, and is one of the most important pests that harm palm plants in Hainan, especially areca palm. Coconut leaf beetle has 4 to 5 generations in a year in the suitable habitat, with overlapping generations. Its adults and larvae like to hide in the unexpanded or newly expanded heart leaves of various palm plants to feed. The insect mainly feeds on the heart of the leaves of palm plants as larvae and adults. When the damage is severe, it will cause necrosis of the plant growth point and death of the entire plant. Coconut leaf beetle is a quarantine pest for imported plants and a supplementary forestry quarantine pest. It is very important to control its population base at a low level so as to achieve effective prevention and control. Currently, coconut leaf beetles are mainly controlled by hanging special medicine bags or using their natural enemy, parasitic wasps. However, the application of special medicine bags has a slow effect and high cost. It is difficult to apply pesticides to areca palm trees with a plant height of more than 3 meters. The use of parasitic wasps is restricted by weather and breeding conditions, making it difficult to quickly block the source of damage from coconut leaf beetles.

[0005] According to specific investigations in Hainan and Shenzhen, there are 36 species of host plants belonging to 26 genera of the coconut heart leaf beetle. The main hosts in Hainan are coconut, bottle palm, royal palm, betel nut, false betel nut, oil palm, date palm, palm tree, fishtail palm, thorny palm, areca palm, Washington coconut, Japanese palm, old man palm, red betel nut and Dong palm. Among them, coconut is the most important host, and it mainly harms plants such as coconut, royal palm, false betel nut and so on.

[0006] The reasons why it is difficult to control are: First, Hainan Province has a tropical monsoon climate, and environmental conditions such as temperature and humidity are conducive to the reproduction and growth of the betel nut coconut leaf beetle. Second, betel nut is an economic plant of the tropical palm family, and the coconut leaf beetle is the main host of palm plants, which is conducive to the spread and development of the betel nut coconut leaf beetle. Third, the coconut leaf beetle has a certain flying ability and can spread and develop over a short distance, especially when encountering a typhoon, the spread speed is faster. Fourth, the long-term use of pesticides containing a single active ingredient for pest control will bring different degrees of harm, such as the development of pest resistance and environmental pollution.

[0007] However, the insect population base does not decrease as expected after the application of conventional pesticides, and the rapid effect and duration of the pesticides do not meet the control needs. Reasonable compounding of different active ingredients can expand the insecticide spectrum, prolong the duration of effectiveness, reduce the amount of pesticides used, thereby reducing the cost of pesticides and reducing environmental pollution. Summary of the invention

[0008] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art and provide an insecticide composition containing cyantraniliprole and thiamethoxam, which can reduce drug resistance, improve control effect, have outstanding rapid effectiveness and lasting effect, and can effectively reduce the insect population base for use in controlling coconut leaf beetles.

[0009] The technical solution of the present invention is: an application of an insecticidal composition containing cyantraniliprole and thiamethoxam to control coconut palm leaf beetles, the insecticidal composition comprises pesticide active ingredients, the pesticide active ingredients are cyantraniliprole and thiamethoxam, the mass ratio of cyantraniliprole to thiamethoxam is 1:5-6:1, and the composition is used for controlling areca palm leaf beetles.

[0010] Furthermore, the total content of active ingredients in the composition preparation is 5%-50%; the composition preparation includes dispersible oil suspension, suspension, water dispersible granules or suspoemulsion.

[0011] Preferably, the total content of active ingredients in the composition preparation is 10-40%, and the composition is a suspension or water-dispersible granules; more preferably, the total amount of active ingredients in the composition preparation is 30%, and the composition is a suspension; ensuring the control effect of the composition on coconut palm leaf beetles.

[0012] Furthermore, the composition preparation is applied to betel nut gardens or betel nut plants by spraying, spreading or smearing. The application method is selected according to the occurrence degree or insect population base of coconut heart leaf beetles in the betel nut garden. When the average coconut heart leaf beetle population base of each betel nut plant is less than 3, the method of spreading or smearing can be used to conduct the effective ingredients of the composition to various parts of the plant through the systemic conduction of the plant vascular bundle, which plays a preventive role on the plant; when the insect population base of the betel nut garden is greater than 3, the spraying method is selected, and the spraying is selected according to the height of the plant. When the plant height is less than 3m, an electric sprayer or a diesel engine water pump is used for spraying; when the plant height is higher than 3m, a drone is used for spraying.

[0013] Furthermore, the mass ratio of cyantraniliprole to thiamethoxam is 1:4 to 4:1.

[0014] Furthermore, the mass ratio of cyantraniliprole to thiamethoxam is 1: 1. Preferably, the mass fractions of the active ingredients cyantraniliprole and thiamethoxam in the composition preparation are both 15%, and the content of the total active ingredients in the composition preparation is 30%; it can achieve the best ratio and control effect on coconut leaf beetles.

[0015] Furthermore, the active ingredient dosage is 30 to 45 g / hectare.

[0016] Furthermore, the amount of water added is 600-900 kg / hectare, and the pesticide is applied by spraying.

[0017] Furthermore, the composition also includes an auxiliary agent, which is selected from one or more of an emulsifier, a dispersant, an antifreeze agent, a defoamer, a thickener, a preservative, a wetting agent, a solvent, a disintegrant, a synergist and a filler.

[0018] Further, the dispersant is one or more of calcium lignin sulfonate, sodium alkylphenol sulfonate, ethylene oxide propylene oxide polyether, modified polystyrene maleic anhydride resin, modified ethylene oxide propylene oxide polyether and alkylnaphthalene sulfonic acid sodium salt formaldehyde condensate; The emulsifier is one or more of polyoxyethylene sorbitan monooleate, polyoxyethylene styrylphenol ether, polyoxyethylene castor oil ether, calcium dodecylbenzene sulfonate, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and polyoxyethylene ether phosphate.

[0019] Further, the antifreeze agent is one or more of propylene glycol, ethylene glycol, glycerol and glyceryl ether diglycol; The defoaming agent is one or more of organic silicone, organic siloxane, and high carbon alcohol fatty acid ester complex; The preservative is one or more of paraformaldehyde, kason, sodium benzoate and potassium sorbate; The thickener is one or more of organic bentonite, attapulgite, magnesium aluminum silicate and xanthan gum.

[0020] Preferably, the wetting agent, solvent, disintegrant, synergist and filler are all common adjuvants in pesticide formulations, such as kaolin, water and the like.

[0021] Cyantraniliprole, English name: cyantraniliprole, chemical name: 3-bromo-1-(3-chloro-2-pyridyl)-N-{4-cyano-2-methyl-6-[(methylamino)carbonyl]phenyl}-1H-pyrazole-5-carboxamide. It is a highly effective and safe dimethoate insecticide developed by DuPont. Its mechanism of action is to activate ryanodine receptors, causing unlimited release of intracellular calcium ions, leading to paralysis of insect muscle relaxation, activity cessation, paralysis, and even complete death; cyanantraniliprole has a wide spectrum of insecticides, and can control both chewing and piercing-sucking mouthparts pests, including Lepidoptera, Coleoptera, Diptera, and Hemiptera. Cyantraniliprole is an analogue of chlorantraniliprole. In addition to the good permeability, conductivity, chemical stability, and high insecticidal activity of chlorantraniliprole, it also has strong systemic activity and kills insects more thoroughly. After application, cyantraniliprole is conducted through the wood and distributed throughout the plant. Therefore, whether it is sprayed, irrigated, or mixed in the soil, it can achieve a good insecticide effect.

[0022] Thiamethoxam, English name: Thiamethoxam, chemical name: (EZ)-3-(2-chloro-1,3-thiazolyl-5-methyl)-5-methyl-N-nitro-1,3,5-oxadiazine-4-imide. Thiamethoxam is a second-generation nicotinoid insecticide with high efficiency and low toxicity. 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 pests to be paralyzed and die. It not only has contact, stomach poison and systemic activity, but also has higher activity, better safety, wider insecticide spectrum, fast action speed and long lasting effect. It is a better variety to replace those organophosphorus, carbamate and organochlorine insecticides that are highly toxic to mammals, have residues and environmental problems. It has high activity against Coleoptera, Diptera, Lepidoptera, especially Homoptera pests, and can effectively control various aphids, leafhoppers, planthoppers, whiteflies, beetle larvae, potato beetles, nematodes, ground beetles, leaf miners and other pests, as well as pests that have developed resistance to various types of chemical pesticides. It can be used for stem and leaf treatment, seed treatment, and soil treatment. Suitable crops include rice crops, sugar beets, rapeseed, potatoes, cotton, beans, fruit trees, peanuts, sunflowers, soybeans, tobacco and citrus. It is safe for crops and has no pesticide damage when used at the recommended dosage.

[0023] The principle of the present invention is that cyantraniliprole and thiamethoxam are used in combination to control the coconut leaf beetles on the areca nut plants, and the insecticidal mechanism of cyantraniliprole and thiamethoxam is combined: activating nicotinic acid receptors to release calcium ions in cells without restriction, thereby causing the insect muscle to relax and paralyze, stop the activity, paralyze, and finally die completely; and inhibiting the nicotinic acid acetylcholinesterase receptors of the insect central nervous system, thereby blocking the normal conduction of the insect central nervous system, causing the paralysis and death of the pest; thereby achieving a double insecticidal control effect, and effectively ensuring the control effect on the coconut leaf beetles; in addition, there is currently no literature on the use of cyantraniliprole and thiamethoxam in combination for controlling the coconut leaf beetles on the areca nut plants in the present invention.

[0024] The present invention has the following beneficial effects: 1. After the two pesticides with active ingredients of cyantraniliprole and thiamethoxam are combined in the present invention, a significant synergistic effect is achieved on the coconut leaf beetle, and the rapid effect and the duration of the effect on the prevention and control of the coconut leaf beetle are outstanding, and the amount and frequency of pesticide use can be effectively reduced, the cost of drug use can be reduced, and the development of drug resistance of the coconut leaf beetle on the plant can be delayed.

[0025] 2. Compared with the existing single-component insecticides, the insecticidal composition containing cyantraniliprole and thiamethoxam of the present invention has obvious insecticidal effect and synergistic effect. At the same time, the insecticidal composition containing cyantraniliprole and thiamethoxam of the present invention is safe to crops and is worthy of promotion and application in agricultural production.

[0026] 3. The composition of the present invention can not only be used for the coconut leaf beetles on areca nut plants, but also has a better control effect on the coconut leaf beetles on coconut trees.

[0027] The present invention is further described in detail below in conjunction with specific implementation modes. DETAILED DESCRIPTION

[0028] The invention discloses an application of an insecticidal composition containing cyantraniliprole and thiamethoxam for controlling coconut palm leaf beetles. The insecticidal composition comprises pesticide active ingredients, wherein the pesticide active ingredients are cyantraniliprole and thiamethoxam, and the mass ratio of cyantraniliprole to thiamethoxam is 1:5-6:1. The insecticidal composition is used for controlling areca palm leaf beetles.

[0029] The total content of the active ingredients of the composition preparation is 5%-50%; the composition preparation includes a dispersible oil suspension, a suspension, a water-dispersible granule or a suspoemulsion. Preferably, the total content of the active ingredients of the composition preparation is 10-40%, and the composition is a suspension or a water-dispersible granule; more preferably, the total amount of the active ingredients of the composition preparation is 30%, and the composition is a suspension; the control effect of the composition on the coconut heart leaf beetle is guaranteed.

[0030] The composition preparation is applied to betel nut gardens or betel nut plants by spraying, spreading or smearing. The application method is selected according to the occurrence degree or insect population base of coconut heart leaf beetles in the betel nut garden. When the average coconut heart leaf beetle population base of each betel nut plant is less than 3, the method of spreading or smearing can be used to conduct the effective ingredients of the composition to various parts of the plant through the systemic conduction of the plant vascular bundle, so as to play a preventive role on the plant; when the insect population base of the betel nut garden is greater than 3, the spraying method is selected, and the spraying is selected according to the height of the plant. When the plant height is less than 3m, an electric sprayer or a diesel engine water pump is used for spraying; when the plant height is higher than 3m, a drone is used for spraying.

[0031] The mass ratio of cyantraniliprole to thiamethoxam is 1:4 to 4:1. The mass ratio of cyantraniliprole to thiamethoxam is 1:1. Preferably, the mass fractions of the active ingredients cyantraniliprole and thiamethoxam in the composition preparation are both 15%, and the content of the total active ingredients in the composition preparation is 30%; it can achieve the best ratio and the control effect on the coconut heart leaf beetle.

[0032] The dosage of active ingredient is 30-45 g / ha and the water content is 600-900 kg / ha, and the pesticide is applied by spraying.

[0033] The composition further comprises an auxiliary agent, which is selected from one or more of an emulsifier, a dispersant, an antifreeze agent, a defoamer, a thickener, a preservative, a wetting agent, a solvent, a disintegrant, a synergist and a filler.

[0034] The dispersant is one or more of calcium lignin sulfonate, sodium alkylphenol sulfonate, ethylene oxide propylene oxide polyether, modified polystyrene maleic anhydride resin, modified ethylene oxide propylene oxide polyether and alkylnaphthalene sulfonic acid sodium salt formaldehyde condensate; The emulsifier is one or more of polyoxyethylene sorbitan monooleate, polyoxyethylene styrylphenol ether, polyoxyethylene castor oil ether, calcium dodecylbenzene sulfonate, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and polyoxyethylene ether phosphate.

[0035] The antifreeze agent is one or more of propylene glycol, ethylene glycol, glycerol and glyceryl ether diglycol; The defoaming agent is one or more of organic silicone, organic siloxane, and high carbon alcohol fatty acid ester complex; The preservative is one or more of paraformaldehyde, kason, sodium benzoate and potassium sorbate; The thickener is one or more of organic bentonite, attapulgite, magnesium aluminum silicate and xanthan gum.

[0036] Preferably, emulsifiers, dispersants, antifreeze agents, defoamers, thickeners, preservatives, wetting agents, solvents, disintegrants, synergists and fillers are all commonly used adjuvants in pesticide preparations. Dispersants, antifreeze agents, defoamers, preservatives, thickeners and emulsifiers are not limited to the above-specified ingredients and can also be commonly used adjuvants in pesticide adjuvants, fillers such as kaolin, water, etc.

[0037] The present invention combines cyantraniliprole and thiamethoxam in controlling the coconut leaf beetle on the areca nut plant, and combines the insecticidal mechanism of cyantraniliprole and thiamethoxam: activating nicotinic acid receptors to release calcium ions in cells without restriction, thereby causing the insect muscle to relax and paralyze, stop activity, paralyze, and even completely die; and inhibiting the nicotinic acid acetylcholinesterase receptors of the insect central nervous system, thereby blocking the normal conduction of the insect central nervous system, causing the pest to be paralyzed and die; thereby achieving a dual insecticidal control effect, and effectively ensuring the control effect on the coconut leaf beetle; in addition, there is currently no literature on the use of cyantraniliprole and thiamethoxam in combination for controlling the coconut leaf beetle on the areca nut plant in the present invention.

[0038] Example 1 30% cyantraniliprole•thiamethoxam SC Cyantraniliprole 5%, thiamethoxam 25%, alkylphenol polyoxyethylene ether phosphate 4%, polyoxyethylene polyoxypropylene ether block copolymer 1%, sodium lignin sulfonate 1%, ethylene glycol 3%, xanthan gum 2%, magnesium aluminum silicate 0.7%, emulsified silicone oil defoamer 1%, sodium benzoate 0.3%, deionized water to 100%. The above materials are mixed in proportion, dispersed evenly by high-speed shearing, and sand-milled in a sand mill to obtain 30% flonicamid•cyanantraniliprole suspension (SC).

[0039] Example 2 The difference between this embodiment and the first embodiment is that cyantraniliprole is 10% and thiamethoxam is 20%.

[0040] Example 3 The difference between this embodiment and the first embodiment is that cyantraniliprole and thiamethoxam are 15%.

[0041] Example 4 The difference between this embodiment and the first embodiment is that cyantraniliprole is 20% and thiamethoxam is 10%.

[0042] Example 5 The difference between this embodiment and the first embodiment is that cyantraniliprole is 25% and thiamethoxam is 5%.

[0043] Example 6 The difference between this embodiment and the first embodiment is that: 30% cyantraniliprole•thiamethoxam dispersible oil suspension The content of the active ingredients cyantraniliprole and thiamethoxam original drug is 95%; the composition includes 15% cyantraniliprole, 15% thiamethoxam, 10% sodium lignin sulfonate, 6% Tween-60#, 5% emulsifier BY-110, 1% sodium naphthalene sulfonate, 0.5% bentonite, 5% glycerol, and methyl oleate is added to 100% by weight. The above raw materials are mixed, dispersed at high speed shear for 30 minutes, and sand-milled with a sand mill to obtain a 30% cyantraniliprole•thiamethoxam dispersible oil suspension.

[0044] Example 7 The difference between this embodiment and the first embodiment is that: 25% cyantraniliprole•thiamethoxam suspension 10% cyantraniliprole, 15% thiamethoxam, 5% sodium alkylnaphthalene formaldehyde condensate sulfonate, 5% phenethylphenol polyoxyethylene ether phosphate, 5% sodium alkyl sulfate, 0.4% carboxyethyl cellulose, 4% glycerol, 0.2% potassium sorbate, 2% octanol, and deionized water are added to 100% by weight. The above raw materials are mixed, dispersed at high speed shear for 30 minutes, and sand-milled with a sand mill to obtain a 25% cyantraniliprole•thiamethoxam suspension.

[0045] Example 8 The difference between this embodiment and the first embodiment is that: 25% cyantraniliprole•thiamethoxam suspension 10% cyantraniliprole, 10% thiamethoxam, 6% sodium alkylnaphthalene formaldehyde condensate sulfonate, 6% phenethylphenol polyoxyethylene ether phosphate, 5% sodium alkyl sulfate, 0.4% carboxyethyl cellulose, 4% glycerol, 0.2% potassium sorbate, 2% octanol, and deionized water are added to 100% by weight. The above raw materials are mixed, dispersed at high speed shear for 30 minutes, and sand-milled with a sand mill to obtain a 20% cyantraniliprole•thiamethoxam suspension.

[0046] Example 9 The difference between this embodiment and the first embodiment is that: 30% cyantraniliprole•thiamethoxam suspension 15% cyantraniliprole, 15% thiamethoxam, 11% calcium lignin sulfonate, 5% white carbon, 5% sodium alkyl sulfate, 2% carboxyethyl cellulose and kaolin are added to 100% by weight. The above raw materials are mixed and crushed by a high-speed air flow mill to obtain a 30% cyantraniliprole•thiamethoxam wettable powder (WP).

[0047] Example 10 The difference between this embodiment and the first embodiment is: 30% cyantraniliprole suspension; 30% cyantraniliprole, 6% sodium alkylnaphthalene formaldehyde condensate sulfonate, 6% phenethylphenol polyoxyethylene ether phosphate, 5% sodium alkyl sulfate, 0.4% carboxyethyl cellulose, 4% glycerol, 0.2% potassium sorbate, 2% octanol, and deionized water added to 100% by weight. The above raw materials are mixed, dispersed at high speed shear for 30 minutes, and sand-milled with a sand mill to obtain a 20% cyantraniliprole•thiamethoxam suspension.

[0048] Embodiment 11 The difference between this embodiment and the first embodiment is that: 30% thiamethoxam wettable powder; 30% thiamethoxam, 11% calcium lignin sulfonate, 5% white carbon black, 5% sodium alkyl sulfate, 2% carboxyethyl cellulose, and kaolin are added to 100% by weight. The above raw materials are mixed and crushed by a high-speed air flow mill to obtain 30% thiamethoxam wettable powder.

[0049] Comparative Example 1 uses 50% imidacloprid 25•chlordextrin 25, which is a common agent on the market, and Comparative Example 2 uses 50% thiamethoxam WP, which is a common agent on the market.

[0050] In 2023, the inventor conducted field efficacy tests on the preparations and control agents in the above embodiments for preventing and controlling areca nut coconut leaf beetles in Qionghai, Hainan.

[0051] The test crop is betel nut. 100 betel nut trees are selected in each plot. The number of coconut leaf beetles is investigated before spraying and the test trees are numbered. 10 trees are marked for each treatment. The number of coconut leaf beetles is investigated before spraying. The spraying method is spraying. After spraying, surveys are conducted once every 1 day, 3 days, and 7 days, and the number of live coconut leaf beetles on the marked leaves is recorded. Each treatment is repeated 3 times, with 1 drug control and 1 water blank control. At the same time, observe whether there is any pesticide damage; the insect population reduction rate is used as the control effect.

[0052] Calculation method of drug efficacy: (Prevention effect) Pest reduction rate (%) = (number of insects before application - number of insects after application) / number of insects before application × 100 Table 1 Average field efficacy of each preparation against Brontispa spp. Table 2 is the original data of each repeated treatment group. From the above test results, it can be seen that by comparing Examples 1-5 and Examples 10-13, it can be seen that the quick-acting and lasting period of compounding cyantraniliprole and thiamethoxam for coconut leaf beetles is significantly better than the control effect of cyantraniliprole or thiamethoxam alone on coconut leaf beetles. In addition, compared with existing products on the market, the control effect of compounding on coconut leaf beetles is significantly better than the control effect of Examples 12 and 13 on coconut leaf beetles. The quick-acting control effect of Example 3 on coconut leaf beetles 3 days after the drug is at least 20% higher than that of Example 12, and the lasting effect of Example 3 on coconut leaf beetles 30 days after the drug is at least 40% higher than that of Example 12. Compounding cyantraniliprole and thiamethoxam for the control of coconut leaf beetles effectively improves the quick-acting and lasting period of the control of coconut leaf beetles, while reducing the number of times pesticides are used, thereby reducing the cost of control. In addition, by comparing Examples 3, 6 and 9, the control effect of compounding on coconut leaf beetles is significantly better than that of Examples 12 and 13. Different formulations were used to control coconut beetles. The results showed that the control effects of different formulations on coconut beetles were similar, all of which could achieve good control effects, and both rapidity and duration of effectiveness could achieve good performance. In addition, by comparing Examples 3, 7 and 8, the same dilution multiple was used, and the dosage of the active ingredient was reduced on the basis of Example 3. It can be obviously found that the control effect on coconut beetles decreased with the decrease in the dosage of the active ingredient, and the best control effect was achieved by compounding 15% cyantraniliprole and 15% thiamethoxam for the control of coconut beetles. The present invention has a significant synergistic effect on coconut beetles after compounding two pesticides with cyantraniliprole and thiamethoxam as active ingredients, and the rapidity and duration of the control of coconut beetles are outstanding, which can effectively reduce the dosage and frequency of pesticides, reduce the cost of medication, and at the same time delay the development of drug resistance of coconut beetles on plants. The insecticidal composition containing cyantraniliprole and thiamethoxam of the present invention has obvious insecticidal effect and synergistic effect compared with the existing single-component insecticide. At the same time, the insecticidal composition containing cyantraniliprole and thiamethoxam of the present invention is safe for crops and is worthy of promotion and application in agricultural production. The composition of the present invention can not only be used for the coconut leaf beetle on the betel nut plant, but also has a better control effect on the coconut leaf beetle on the coconut tree.

[0053] The above are preferred embodiments of the present invention and the technical principles used therein. For those skilled in the art, any obvious changes such as equivalent transformations, simple replacements, etc. based on the technical solution of the present invention, without departing from the spirit and scope of the present invention, are within the scope of protection of the present invention.

Claims

1. An application of an insecticidal composition containing cyantraniliprole and thiamethoxam to control coconut palm leaf beetles, characterized in that: The insecticide composition comprises pesticide active ingredients, wherein the pesticide active ingredients are cyantraniliprole and thiamethoxam, the mass ratio of cyantraniliprole to thiamethoxam is 1:5-6:1, and is used for preventing and controlling the betel nut coconut leaf beetle.

2. The use of the insecticidal composition containing cyantraniliprole and thiamethoxam according to claim 1 for controlling coconut palm leaf beetles, characterized in that: The total content of active ingredients in the composition preparation is 5%-50%; the composition preparation includes dispersible oil suspension, suspension, water dispersible granules or suspoemulsion.

3. Use of the insecticidal composition containing cyantraniliprole and thiamethoxam according to claim 1 for controlling coconut palm leaf beetles, characterized in that: The composition preparation is applied to betel nut gardens or betel nut plants in the manner of spraying, spreading or smearing.

4. The use of the insecticidal composition containing cyantraniliprole and thiamethoxam for controlling coconut palm leaf beetles according to claim 1, characterized in that: The mass ratio of cyantraniliprole to thiamethoxam is 1:4 to 4:

1.

5. Use of the insecticidal composition containing cyantraniliprole and thiamethoxam according to claim 1 for controlling coconut palm leaf beetles, characterized in that: The mass ratio of cyantraniliprole to thiamethoxam is 1:

1.

6. Use of the insecticidal composition containing cyantraniliprole and thiamethoxam for controlling coconut palm leaf beetles according to claim 1, characterized in that: The dosage of active ingredient is 30-45 g / hectare.

7. Use of the insecticidal composition containing cyantraniliprole and thiamethoxam according to claim 1 for controlling coconut palm leaf beetles, characterized in that: The water addition rate is 600-900 kg / hectare, and the pesticide is applied by spraying.

8. Use of the insecticidal composition containing cyantraniliprole and thiamethoxam for controlling coconut palm leaf beetles according to claim 1, characterized in that: The composition further comprises an auxiliary agent, which is selected from one or more of an emulsifier, a dispersant, an antifreeze agent, a defoamer, a thickener, a preservative, a wetting agent, a solvent, a disintegrant, a synergist and a filler.

9. Use of the insecticidal composition containing cyantraniliprole and thiamethoxam for controlling coconut palm leaf beetles according to claim 8, characterized in that: The dispersant is one or more of calcium lignin sulfonate, sodium alkylphenol sulfonate, ethylene oxide propylene oxide polyether, modified polystyrene maleic anhydride resin, modified ethylene oxide propylene oxide polyether and alkylnaphthalene sulfonic acid sodium salt formaldehyde condensate; The emulsifier is one or more of polyoxyethylene sorbitan monooleate, polyoxyethylene styrylphenol ether, polyoxyethylene castor oil ether, calcium dodecylbenzene sulfonate, polyoxyethylene fatty alcohol ether, polyoxyethylene alkylphenol ether and polyoxyethylene ether phosphate.

10. Use of the insecticidal composition containing cyantraniliprole and thiamethoxam for controlling coconut palm leaf beetles according to claim 8, characterized in that: The antifreeze agent is one or more of propylene glycol, ethylene glycol, glycerol and glyceryl ether diglycol; The defoaming agent is one or more of organic silicone, organic siloxane, and high carbon alcohol fatty acid ester complex; The preservative is one or more of paraformaldehyde, kason, sodium benzoate and potassium sorbate; The thickener is one or more of organic bentonite, attapulgite, magnesium aluminum silicate and xanthan gum.

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