33 results about "Isofenphos-methyl" patented technology

The present invention relates to a new-type pests-killing and disease-preventing seed-dressing agent. Its composition includes fludioxonil, isofenphos-methyl raw medicine and adjuvant. Its pH value is 6.5-7, in said seed-dressing agent the plant growth regulator sodium nitriphenolate also can be added. Said invention is application to wheat, corn, cotton and peanut. Besides, said invention also provides its concrete application method.

The invention relates to a detection method of concentration of isofenphos-methyl, and application. The detection method of the concentration of isofenphos-methyl comprises the following steps: collecting Terahertz time domain spectrum of a standard solution of each isofenphos-methyl, acquiring the terahertz absorption spectrum of the standard solution of each isofenphos-methyl, and computing areaof a feature absorption peak of the standard solution of each isofenphos-methyl; establishing a relation function of the concentration of the isofenphos-methyl and the feature absorption peak; extracting the isofenphos-methyl in the to-be-detected sample according to the dispersion solid-phase extraction method so as to obtain the purification liquid; drying the purification liquid, and then filling to the predetermined volume to obtain a detection sample, collecting the terahertz time domain spectrum of the detection sample, and acquiring the terahertz absorption spectrum of the detection sample; computing the area of the feature absorption peak of the detection sample; and computing the concentration of the isofenphos-methyl of the to-be-detected sample. The above detection method is relatively simple in operation.

The invention discloses a control method for a greenhouse tomato root knot nematode disease. The morbidity of the greenhouse tomato root knot nematode disease can be greatly lowered, the yield of greenhouse tomatoes is increased, and the quality of the greenhouse tomatoes is improved. The method comprises the following steps of crop rotation implementation, seed treatment, soilless culture of nematode-free strong seedlings, grafting cultivation, soil disinfection, biological control and chemical control. Accordingly, the means of early prevention is adopted, it is clarified that 40% isofenphos methyl E.C. or nematode repellent powder is used for conducting biological control on soil, and meanwhile biological control and chemical control are combined. The experiment shows that by means of soil ecological control, the tomato root knot nematode disease can be effectively prevented, the control efficiency reaches 90% or above, the average morbidity of the tomato root knot nematode disease is significantly lowered, the tomato yield is increased, the tomato quality is significantly improved, and the good economic benefit is achieved.

The invention provides a vegetable greenhouse pollution free disinsection method comprising the following control works before vegetable plantation: a, soil working: timely shallow ploughing the soil in the vegetable greenhouse after the preceding crop is harvested, applying 700-1000kg decomposed organic fertilizer per mu, evenly mixing the fertilizer with the soil, flattening the soil, sealing the whole greenhouse, and exposing the soil under the burning sun; b, seed disinfection: drying high quality seeds in the sun for 2-3 days before sowing, immersing the seeds into warm temperature of 48-60 DEG C for 15-30 minutes, placing the seeds into cool water for cooling, catching seeds and draining off, and mixing 20% triadimefon EC and 40% isofenphos-methyl EC to with the seeds; c, fixing an insect-proof net on greenhouse shoulders. After vegetable plantation, light trapping and garden cleaning are carried out. The vegetable greenhouse pollution free disinsection method can prevent pesticide usage, can satisfy people demands on green foodstuff, can reduce or even eliminate disease and pest generations in the vegetable growth period, thus improving vegetable quality and mouthfeel.

The invention discloses a method for planting Chinese angelica with a high yield. The invention relates to the field of Chinese herbal medicine plantation, and in particular to a method for planting Chinese angelica with a high yield. The method herein is characterized in that the method is realized by the following steps: 1, selecting and tilling a piece of land, specifically selecting a gentle slope which is located facing the north and is half shady and half sunny, with loose soil property and an excellent structure; 2, sowing seeds and growing seedlings, sowing seeds here referring to broadcast sowing, specifically broadcasting the seeds mixed with dust onto the furrow surface, then slightly suppressing the furrow surface, covering the furrow surface with a small amount of fine and moisture soil, covering the furrow surface with a layer of grass, keeping the furrow surface light-penetrating and wet, the seedlings herein having an age of no more than 100 days, sowing 4-5 kilograms of the seedlings per mu (a unit of area) with plants spaced 25 centimeters apart from each other, picking and loosening the covered grass after about 40 days, loosening the soil one time when the sprouts grow to 3 centimeters height; 3, transplanting; 4, adding fertilizers, such asphosphor, potassium, ammonia fertilizers; 5, preventing and treating diseases and insects, evenly mixing the 3911 particle agents and fine soil, or mixing the isofenphos-methyl emulsion in combination with kilograms of water to the soil, spraying and applying and turning into the land, employing the Carbendazim suspensoid or Topsin with water per mu, loading a 50 grams of the diluted liquid to each plant; 6, harvesting.

The invention belongs to the technical field of pesticide, and discloses a compound composition containing an organophosphorus insecticide and a chitin synthesized inhibitor and application of the compound composition. The compound composition is composed of the organophosphorus insecticide and the chitin synthesized inhibitor, and the mass ratio of the organophosphorus insecticide to the chitin synthesized inhibitor is 1:50 to 50:1. The organophosphorus insecticide is selected from one of phoxim, chlorpyrifos, dipterex, isofenphos-methyl and triazophos, the chitin synthesized inhibitor is selected from one of diflubenzuron, chlorbenzuron, chlorfluazuron, hexaflumuron, flufenoxuron, diafenthiuron and buprofezin. The organophosphorus insecticide and the chitin synthesized inhibitor are compounded; compared with a single-dosage organophosphorus insecticide, the prevention effect of preventing soil insects is improved; compared with the independently adopted organophosphorus insecticide,if the compound composite is reduced by 20%, a good prevention effect can still be achieved.

The invention discloses a method for preventing southern blight by using white atractylodes rhizome, and the method comprises the following steps of: (1) spraying isofenphos-methyl to sterilize the soil before seeding; (2) using hymexazol to soak the rhizome of the white atractylodes rhizome; and 3) mixing isofenphos-methyl, hymexazol and hymexazol by a certain proportion after planting, and spraying for 5-8 times. The white atractylodes rhizome treated by the method disclosed by the invention can effectively prevent southern blight, reduce the harms caused by southern blight to the white atractylodes rhizome, improve the survive rate of the white atractylodes rhizome, and increase the yield of the white atractylodes rhizome.

The invention discloses an integrated control method for willow plagiodera versicolora. In the last ten days of September, when imagoes and larvae show feigndeath, a 20% fenvalerate 1500-time solution is sprayed onto trees; in the middle ten days of December, soil under a willow forest is deeply ploughed for 25 cm; in the last ten days of next January, 3% isofenphos-methyl granules are spread under the willow forest with 500-700 grams per mu; in the first ten days of next February, a toxic ring with the width of 20 cm is made at the position, 40 cm away from the ground, of each trunk and wound around the trunk by one circle. The integrated control method is simple, convenient to implement, good in effect and capable of making the harm caused by plagiodera versicolora be reduced by more than 85%.

The invention relates to the technical field of summer squash seeds, in particular to a summer squash seed culture method. The summer squash seed culture method comprises the following steps of seed selection and soaking, seed bed preparation, germination accelerating of seeds, preparation of a nutritional agent, disinfection of coated seeds and sowing with the coated seeds. The nutritional agentis added so as to be used for providing nutrients required by production in the culture process of the summer squash seeds, so that in the environment changing process, the nutrient requirements for the summer squash growing process are met, and the summer squash yield is improved; moreover, the antibacterial capacity and the insect resistance of the summer squash in the culture process are improved by adding an isofenphos-methyl solution, and the summer squash production stability is improved.

The invention discloses a pest repellent and a preparation method thereof, and relates to the field of crop protection. The pest repellent is prepared from, by weight, 10-20 parts of isofenphos-methyl, 5-10 parts of parathion-methyl, 2-6 parts of tributyl tin chloride, 7-12 parts of cyclohexanone, 5-8 parts of isobutyl cyanide, 2-4 parts of cyclodextrin, 3-8 parts of methylbenzene, 1-2 parts of carbomer, 2-3 parts of 95% ethyl alcohol, 7-9 parts of polyethylene glycol, 0.5-1 part of triethanolamine, 7-10 parts of Chinese prickly ash ethanol extract and 4-6 parts of water hyacinth ethanol extract. According to the technical scheme, preparation steps are reasonable, operation is convenient, and the prepared pest repellent is poisonless and harmless, has high phobotaxis and can promote the growth of plants to some degree.

The invention discloses a garlic disease and insect control method. The method comprises the following steps that 1, before sowing is conducted, soil is subjected to deep tillage, upturned soil is sunned 15 days or above, base fertilizer needs to be fully humic, in the period that nutrients are absorbed by garlic roots, watering is conducted in time, and ammonium hydroxide or ammonium bicarbonatedressing is conducted in combination with irrigation; 2, before sowing is conducted, 1 kg of 50% phoxim is mixed with 100 kg of sandy soil, and the mixture is scattered in a seed furrow; 3, in mid April, 1000-fold 40% isofenphos-methyl and 2000-fold 2% Tianda abamectin are used for conducting spraying and root irrigation once every 10-15 days three times. Accordingly, pests such as hylemyia antigua meigen, hylemyia platura meigen, root mites, thrips and liriomyza can be effectively controlled, the yield of the garlic is increased, and the loss is reduced.

The invention discloses a mint planting method based on cutting propagation, and belongs to the technical field of mint planting. The method comprises the steps of mint planting field selection and regulation, mint seedling growing, transplanting and pinching; during seedling growing, aerial stems of plants are cut into 8 cm long cuttings, soil is used for wrapping the cuttings, meanwhile the soil is pinched, the structure is a cylinder, the diameter of the cylinder is 5 cm, and the height of the cylinder is 10 cm; the stems and branches wrapped by the soil are inserted into a seedbed according to the row spacing being 6 cm*6 cm; before the stems and branches wrapped by the soil are inserted into the seedbed, the seedbed is watered, an isofenphos-methyl 800-fold solution with the concentration being 30% is sprayed. By wrapping the mint cuttings by soil for cultivation, when the cuttings are transplanted to a land for growing field crops, and damage to the roots of the cuttings is lowered; the seedbed is watered, pesticide is sprayed, and the mothproof effect is achieved; by arranging the line spacing to be 30 cm, and space is provided for collecting mint fallen leaves.

The invention discloses a pest repellent and a preparation method thereof and relates to the field of crop protection. The pest repellent is prepared from, in parts by weight, 10-20 parts of isofenphos-methyl, 5-10 parts of parathion-methyl, 2-6 parts of tributyl tin chloride, 7-12 parts of cyclohexanone, 5-8 parts of isobutyronitrile, 2-4 parts of cyclodextrin, 3-8 parts of methylbenzene, 1-2 parts of carbomer, 2-3 parts of 95% ethanol, 7-9 parts of polyethylene glycol, 0.5-1 part of triethanolamine, 7-10 parts of a pepper ethanol extract and 4-6 parts of a water hyacinth ethanol extract. With the adoption of the technical scheme, the preparation steps are reasonable and convenient to operate, and the prepared pest repellent is non-toxic and harmless, has high repelling property and can have a certain promotion function on plant growth.

The invention discloses a fertilizer special for beet and a preparation method thereof. The fertilizer consists of the following formula ingredients by mass: 18-20 parts of decomposed cow dung, 20-22 parts of amorpha fruticosa green manure, 16-18 parts of ammonium nitrate, 13-15 parts of a potassium fertilizer, 12-14 parts of a phosphorus fertilizer, 11-13 parts of diammonium phosphate, 10-12 parts of a yeast fertilizer, 11-14 parts of ferrous sulfate, 7-9 parts of a phosphate-solubilizing bacteria fertilizer, 6-8 parts of manganese oxide, 3-5 parts of DA-6, 4-6 parts of borax, 1-3 parts of isofenphos-methyl, and 50-60 parts of water. The fertilizer special for beet provided by the invention has rich nutrient substances and balanced ratio, can promote dark green beet leaves, improve the sugar content of beet, and increase the beet resistance to diseases and pests, thus significantly enhancing the yield and quality of beet.

The invention discloses a maize Athetis lepigone insecticide. The maize Athetis lepigone insecticide is prepared by using the following components in parts by weight: 1 part of emamectin benzoate, 1-5 parts of high effect cypermethrin, 2-6 parts of chlorpyrifos, 1-7 parts of indoxacarb, 3-7 parts of isofenphos-methyl, 18-26 parts of Chinese thorowax root, 25-35 parts of Radix codonopsis and 0.1-0.5 part of sodium carboxymethylcellulose. Compared with the prior art, the maize Athetis lepigone insecticide disclosed by the invention has the advantages that the efficacy is outstanding, the efficacy lasting period is long, the use time of the insecticide can be reduced, the raw materials are saved and the environmental pollution is reduced.

The invention discloses a high-yield and selenium-rich barley cultivation method. Insecticidal and disinfection soil applied to each mu of land before seeds are sown is prepared from 250 ml of 40% phoxim emulsifiable concentrate or 40% isofenphos-methyl emulsifiable concentrate, 1-2 kg of mixing water and 25 kg of mixing fine sand soil. The high-yield and selenium-rich barley cultivation method includes uniformly broadcasting the insecticidal and disinfection soil to land surfaces before the lands are plowed, and plowing the insecticidal and disinfection soil under soil along with land plowing; mixing seed coating agents with the seeds; sowing the seeds in due time according to soil moisture statuses; spraying selenium-rich foliar fertilizers on leaf surfaces in calm and fogless early mornings or evenings at heading stages; spraying selenium-rich foliar fertilizers on the leaf surfaces in calm and fogless early mornings or evenings at initial filling stages; spraying selenium-rich foliar fertilizers on the leaf surfaces in calm and fogless early mornings or evenings at middle filling stages. Every 1.3 kg of selenium-rich foliar fertilizers sprayed on the leaf surfaces in the calm and fogless early mornings or evenings at the heading stages are mixed with 45-50 kg of water to be sprayed on the leaf surfaces in each mu of land. Every 1.3 kg of selenium-rich foliar fertilizers sprayed on the leaf surfaces in the calm and fogless early mornings or evenings at the initial filling stages are mixed with 35-40 kg of water to be sprayed on the leaf surfaces in each mu of land. Every1.3 kg of selenium-rich foliar fertilizers sprayed on the leaf surfaces in the calm and fogless early mornings or evenings at the middle filling stages are mixed with 35-40 kg of water to be sprayedon the leaf surfaces in each mu of land. Selenium-rich fertilizers comprise 80%-85% of urea, 8%-8.5% of potassium dihydrogen phosphate, 8%-8.5% of chitin and 0.045%-0.005% of organic selenium with theselenium content of 6 g / l. The high-yield and selenium-rich barley cultivation method has the advantages that the purpose of increasing the selenium content of barley and the yield of the barley canbe achieved, and diseases of the barley can be effectively controlled.

The invention provides a determination method of pesticides including ethoprophos and the like in Xinhui tangerine peels and products of the Xinhui tangerine peels. The pesticides comprise the ethoprophos, sulfotep, terbufos, monocrotophos, methy-parathion, fenitrothion, isofenphos-methyl and isocarbophos. The method comprises the following steps: manufacturing a standard curve, extracting a sample, purifying the sample and determining the sample. The determination method has the advantages of simplicity and rapidness in operation, high sensitivity and strong matrix interference resistance capability, and is suitable for qualitative and quantitative analysis of pesticide residues in the Xinhui tangerine peels and the products of the Xinhui tangerine peels.

The invention discloses a sitodiplosis mosellana pesticide. The sitodiplosis mosellana pesticide is mainly prepared from the following ingredients in ratio by weight: 1 part of phoxim, 2-6 parts of deltamethrin, 1-7 parts of chlorpyrifos, 1-5 parts of isofenphos-methyl, 10-20 parts of golden cypress, 20-30 parts of quispualis indica, 25-35 parts of fructus cnidii, 1-5 parts of sodium carboxymethylcellulose and 0.1-0.5 part of Twain 800. Compared with the prior art, the obtained sitodiplosis mosellana pesticide has a remarkable pesticide effect and long lasting period, and can reduce drug use times, save raw materials and reduce environmental pollution.

The invention discloses environment-friendly antibacterial soybean high yield seed coating, which is characterized by being prepared from the following raw material components in parts by weight: 35 to 45 parts of urea, 7 to 9 parts of ammonium phosphate, 5 to 7 parts of alginic acid, 3 to 6 parts of water-soluble fungicide, 2 to 3 parts of carbendazim, 2 to 3 parts of thiophanate, 3 to 5 parts of isofenphos-methyl, 4 to 6 parts of oxytetracycline powder, 4 to 6 parts of gibberellin, 0.8 to 1.2 parts of a-naphthylacetic acid, 0.6 to 0.8 parts of film-forming agent, and 5 to 7 parts of kaolin micro powder. According to the environment-friendly antibacterial soybean high yield seed coating disclosed by the invention, pesticidal and antibacterial properties are stable when the seed coating is applied; resource saving and zero release of waste are really realized, requirements of peasant household on farm operation such as fertilization and insecticide spraying are lowered, work hours are reduced, the cost are saved, and high efficiency of modern agricultural production can be met; the film-forming agent enables a film-forming layer of the seed coating to have a net structure, the film-forming is uniform, slow release can be realized after seeds are sowed, the effects of sterilization and disease prevention and promotion of seed germination are achieved, seed vigor can be improved, safety and non-pollution can be realized, and the maize yield can be effectively improved.

The invention discloses an environment-friendly antibacterial seed coating agent capable of realizing high yield of soybeans. The seed coating agent is characterized by comprising the following raw materials by weight: 35 to 45 parts of urea, 7 to 9 parts of ammonium phosphate, 5 to 7 parts of alginic acid, 3 to 6 parts of a water-soluble bactericide, 2 to 3 parts of carbendazim, 2 to 3 parts of thiophanate, 3 to 5 parts of isofenphos-methyl, 4 to 6 parts of terramycin powder, 4 to 6 parts of gibberellins, 0.8 to 1.2 parts of alpha-naphthylacetic acid, 0.6 to 0.8 part of a film forming agent and 5 to 7 parts of micro powder of kaolin. In usage, the seed coating agent provided by the invention has stable insecticidal and bactericidal performance; conservation of resources and zero discharge of the waste are actually realized; requirements on farmers in farm operations like fertilization and bactericide spraying are reduced; labor hours are decreased; cost is saved; the demand for high effectiveness of modern agricultural production is met; the film forming agent enables a formed film of the seed coating agent to have a net structure and to be uniform, and drugs are slowly released after sowing of seeds, so the seed coating agent is capable of killing bacteria, preventing diseases, promoting seed germination, improving seed vitality and effectively increasing the output of soybeans, and is safe and free of pollution.

The invention discloses an alfalfa seed dressing agent applicable to prevention and treatment of pests and diseases such as root rot and the like. The seed dressing agent is prepared by blending multiple materials including isofenphos methyl, carbendazim, ammonium molybdate, borax, zinc sulfate and the like. The seed dressing agent can prevent root rot of alfalfa with the efficiency up to 85%, prevent root maggot with the efficiency up to 95%, and prevent underground pests with the efficiency up to 96%. The seed dressing agent can improve the emergence rate of seeds simultaneously, and can significantly promote the growth of underground parts and overground parts of the crop during seedling stage.

The invention discloses a composition for preventing European red mite and a preparation method thereof. The composition is prepared from, by weight, 25-35 parts of isofenphos-methyl, 15-25 parts of hypaconitine, 135-155 parts of propylene glycol, 425-445 parts of water and 7-9 parts of synergist tricresyl phosphate and indoleacetic acid, wherein the ratio of parts by weight of tricresyl phosphate to indoleacetic acid is (6-8):1. The composition can prevent and treat European red mite, the composition can be developed into pesticide for preventing and treating European red mite, the prevention and treating effect is related to the ratio of the parts by weight of tricresyl phosphate to indoleacetic acid in the raw materials, and the prevention and treating effect is the best when the ratio of the parts by weight of tricresyl phosphate to indoleacetic acid is (6-8):1.

The invention discloses a solid phase extraction-gas chromatography-tandem mass spectrometry detection method for isofenphos-methyl in fruit and vegetable. A sample is prepared, the sample to be purified is extracted, a sample solution to be purified is purified, a standard work solution is prepared, the sample solution to be detected is detected, and the content of isofenphos-methyl in the fruitand vegetable sample is calculated. Thus, the method can be used to determine the isofenphos-methyl pesticide in the fruit and vegetable. The fruit and vegetable sample is extracted by acetonitrile, and purified by a GCB / NH2 solid-phase extraction column, a target analyte is analyzed qualitatively in a multi-reaction monitoring mode by comparing retention time and ion pair information, and an external standard method is quantitative. The method is simple in the experimental process, and high in analysis speed resistance to background interference, sensitivity, reproducibility and accuracy, andcan serve as a new detection method for evaluating the quality of the fruit and vegetable sample.

The invention discloses a compound medicament for treating both underground pests and plant pathogenic nematodes, which is composed of active ingredients, fillers and auxiliary agents. The active ingredients include sulfamidophos and component A, and the component A is chlorpyrifos , phoxim, triazophos, diazinon, imidacloprid, abamectin, trichlorfon, phorate, carbosulfan, cypermethrin, cis-cypermethrin, terbufos, isofenphos-methyl , Bacillus thuringiensis, Beauveria bassiana or entomopathogenic nematodes, the weight ratio of the two is 1:10-10:1. The present invention adopts the compound medicament for controlling subterranean pests and plant pathogenic nematodes with the above components, which can avoid repeated application of pesticides, reduce the amount of pesticides used, reduce the production cost of crops, reduce pesticide residues on crops, and reduce environmental pollution. degree.

The invention provides a determination method of pesticides including ethoprophos and the like in Xinhui tangerine peels and products of the Xinhui tangerine peels. The pesticides comprise the ethoprophos, sulfotep, terbufos, monocrotophos, methy-parathion, fenitrothion, isofenphos-methyl and isocarbophos. The method comprises the following steps: manufacturing a standard curve, extracting a sample, purifying the sample and determining the sample. The determination method has the advantages of simplicity and rapidness in operation, high sensitivity and strong matrix interference resistance capability, and is suitable for qualitative and quantitative analysis of pesticide residues in the Xinhui tangerine peels and the products of the Xinhui tangerine peels.

The present invention is one kind of germicide preparation for preventing and treating root rot of notoginseng and its preparation process. The germicide preparation consists of wettable thiopanate-methyl powder, wettable isofenphos-methyl+triazolone powder and wettable bismerthiazol powder in certain weight proportion. It has excellent effect of preventing and treating diseases caused by ascomycetes, deuteromycetae, oomycetes, etc. It is used in treating seed and seedling of notoginseng, and has high root rot preventing and treating effect, low toxicity and less residue. It may be also used as seed treating agent for other Chinese medicine material plant, vegetable, etc.

The invention discloses a method for controlling wheat Sitodiplosis mosellana. The method includes the following steps: before sowing of wheat seeds, mixing 3-3.5 kg of a 2.5% isofenphos-methyl granular formulation and 10 kg of fine soil, evenly distributing the mixture to a wheat field per mu, and turning over a wheat field land; in a Sitodiplosis mosellana pupa stage, mixing 800-1000 g of 5% chlorpyrifos powder and 25 kg of fine soil, evenly distributing the mixture to wheat ridges, and then watering the wheat field; in a Sitodiplosis mosellana adult stage, adding 45 kg of water into 50-70 ml of 40% phoxim emulsifiable concentrate, and continuously spraying wheat for 3 times every 4 days. The method adopts a prevention first and treatment second strategy to control the Sitodiplosis mosellana, and can greatly improve the yield of the wheat.

The present invention relates to a new-type pests-killing and disease-preventing seed-dressing agent. Its composition includes fludioxonil, isofenphos-methyl raw medicine and adjuvant. Its pH value is 6.5-7, in said seed-dressing agent the plant growth regulator sodium nitriphenolate also can be added. Said invention is application to wheat, corn, cotton and peanut. Besides, said invention also provides its concrete application method.

The invention discloses a wheat seed dressing method for promoting wheat premature. The method includes the steps that a gibberellin-alcohol solution is prepared, reductive iron powder, potassium chloride, isofenphos-methyl cream and triadimefon cream are weighed, a mixed solution of water is prepared, and the mixed solution and wheat seeds are evenly mixed. The outer surfaces of the wheat seeds are evenly coated with homogenate. By means of the seed dressing method, gibberellin, the reductive iron powder, the potassium chloride, the isofenphos-methyl cream, triadimefon and other effective ingredients are evenly mixed with wheat seeds for repeated seed dressing, the effects of promoting premature, orderly seedling emergence and seedling strengthening of northern late wheat are remarkable,plant diseases and pests can be effectively prevented simultaneously, wheat tillering and forming of high-quality colonies are facilitated, and therefore the yield of the wheat is increased.

The invention discloses a pesticide composition containing isofenphos-methyl. The effective active components of the pesticide composition comprise Synedrella nodiflora extract and the isofenphos-methyl, wherein the weight ratio of the Synedrella nodiflora extract to the isofenphos-methyl is 40:1-1:10. The pesticide composition has the advantages that the pesticide composition has an excellent control effect on nematodes such as peanut root knot nematodes and sweet potato tuber nematodes and is lasting in effect and safe to crops; the Synedrella nodiflora extract and the isofenphos-methyl are combined to achieve an evident synergic effect, pesticide use amount can be reduced, application cost can be lowered, pollution to environments can be relieved, the generation of the pesticide tolerance of the nematodes can be delayed, and pesticide service life is prolonged.