46 results about "Pirimicarb" patented technology

The invention belongs to the technical field of vegetable cultivation, and particularly relates to a spinach planting method. The spinach planting method comprises steps as follows: 1, determination of sowing time and varieties of autumn spinach: seeds are sown during August and September and can be harvested in batches after being sown for 30-40 days; 2, soil preparation and bedding: loose, fertile and subacid soil with water and nutrient retention functions and good irrigation and drainage conditions is preferably selected, and the pH (potential of hydrogen) value is 5.5-7; 3, sowing and seedling raising: broadcast sowing is generally adopted, the seeds are soaked for 12 hours one week before sowing in summer and autumn, then subjected to germination acceleration at the temperature of 20-25 DEG C and sown after germination in 3-5 days; 4, field management: diluted liquid manure is applied once after autumn spinach grow true leaves, additional fertilizers are applied in the principle that the concentration of the fertilizers is gradually increased in combination of thinning and weeding after two true leaves grow out, and more composted manure fertilizers are applied at the earlier stage; 5, control of diseases and pests: dimethoate which has the concentration of 40% and is diluted for 1000 times or pirimicarb which has the concentration of 50% and is diluted for 2000-3000 times is applied for controlling aphid; 6, timely harvesting: generally, when seedlings are 10 cm high or higher, the spinach can be harvested in batch.

The invention discloses a synergistic pesticide composition and application thereof. The active components of the synergistic pesticide composition are flufiprole and carbamate pesticide, wherein the carbamate pesticide is one of fenobucarb, isoprocarb, carbosulfan, carbaryl, metolcarb, methomyl, pirimicarb and thiodicarb. The weight ratio of the flufiprole to the carbamate pesticide is (1:50) - (1:1), and the weight percentages of the flufiprole and the carbamate pesticide in the composition are both 2-80%. The synergistic pesticide composition is applied to preventing and controlling agricultural pests. Through the application of the synergistic pesticide composition, the control efficiency is obviously improved as compared with that of single dosage, the use amount of the pesticide is reduced, the influence of pesticide on environment is reduced, and the pesticide cost is lowered.

The invention provides a method for purifying and detecting pirimicarb by utilizing a molecularly imprinted polymer (MIP), belonging to the biochemical technical field. The method comprises the following steps: mixing and dissolving pirimicarb template molecules, a functional monomer of trifluoromethyl acrylic acid and a cross-linking agent of ethylene glycol dimethacrylate in heptane, and adding an initiator of 4,4'-azo-2(4-cyanovaleric acid)-silica gel to the obtained mixed solution; filling up nitrogen for 5-10 minutes, sealing an ampoule under protection of the nitrogen, carrying out water bath and heat preservation at 65-70 DEG C for reacting for 20-30 hours, and then removing the template molecules through soxhlet extraction; drying the polymer without the template molecules at 60 DEG C for staying overnight to obtain the MIP of the pirimicarb; filling the MIP of the pirimicarb into a solid-phase extraction column tube; and activating a solid-phase extraction column, adding sample fruit and vegetable extracting solution, washing the solid-phase extraction column, eluting, purifying and finally collecting the pirimicarb. The method of the invention can make up the pretreatment disadvantage for detecting the pirimicarb in the existing fruit and vegetable environment, simply, rapidly, specifically and efficiently enrich and purify a trace amount of the pirimicarb, and improve the existing detection sensitivity.

The invention discloses a preparation method of pirimicarb. The method is used for preparing the pirimicarb by reaction in which 5,6-dimentyl-2-dimethylamino-4-hydroxypyrimidine and dimethylamino carbamyl chloride are taken as raw materials, sodium hydroxide is taken as an acid-binding agent, an inert solvent, namely toluene or dimethylbenzene, is taken as a reaction solvent, and 4-dimethylamino pyridine is taken as a catalyst. The reaction formula is shown in the description, the pirimicarb content is as high as 98.1% to 99.2%, the reaction yield is as high as 98.1%-99.4% metered by 5,6-dimentyl-3-dimethylamino-4-hydroxypyrimidine, the reaction time is as short as 1h-3h, the acid-binding agent is unnecessary to recycle, the operation and subsequent processing are simple, and the production cost is low.

The invention discloses an acetamiprid-pirimicarb pesticide compound monitoring Woolly apple aphid and yellow aphid, the effective ingredients of said pesticide compound are compound of acetamiprid and pirimicarb, the weight ratio between acetamiprid and pirimicarb is in the range of 1:20-1:2, the effective ingredient of pesticide compound is 5-30wt%, the compound of acetamiprid and pirimicarb which are effective ingredients can be made into creaming agent, micro-emulsion and other agents, for preventing the two kinds of aphid injuries Woolly apple aphid and yellow aphid at the same time, the effect of monitoring two kinds of aphid injuries at one time is significant, while it is safe for natural enemies of pest. So using the pesticide compound according to the invention is good for reducing the control cost and optimizing the pest integrated control system.

The invention relates to a synthesis method of a pirimicarb intermediate 2-methyl acetoacetate, comprising the following steps of: in the presence of tertiary amine and a polymerization inhibitor, carrying out an addition reaction on raw materials methyl acrylate and acetyl chloride to obtain 2-acetyl-methyl acrylate, and carrying out hydrogenation reduction to obtain the product 2-methyl acetoacetate. The synthetic method of the pirimicarb intermediate 2-methyl acetoacetate has the advantages of high yield, high purity and few byproducts.

The invention relates to a prevention and control method for grape mealybugs. The prevention and control method comprises the following steps: firstly, ecological management: (1) paying attention to the use of phosphate fertilizers to strengthen the adverse resistance, and (2) applying Difulai and HYT(High Yield Technology) microorganism fertilizers to improve the soil texture and strengthen the soil fertility; secondly, agricultural prevention and control; thirdly, biological control; fourthly, biological prevention and control; fifthly, physical prevention and control; and sixthly, chemical prevention and control: (1) spraying a solution formed by diluting 25 g / l deltamethrin missible oil by 2000-2500 times for prevention when the mealybugs live through the winter, or using phoxim and pirimicarb around the soil so as to kill hibernating eggs, and (2) spraying a solution formed by diluting 25 g / l deltamethrin missible oil by 2000-2500 times for preventing and controlling the mealybugs living through the winter in the hatching period of each generation of larvae, so that the effect is better after a spreader is added in the medicament due to a layer of wax powder on the surface of each insect body. Moreover, the method can effectively prevent the grape mealybugs, and performs comprehensive prevention and control by adopting the measures such as agricultural prevention and control and physical prevention and control, so that the average incident rate of the grape mealybugs is reduced, the yield is increased, the rice level is obviously improved, and a good economic benefit is achieved.

The invention provides an eggplant planting method capable of controlling pests. The method comprises the steps of: when eggplant seedlings are planted, laying a silver-gray mulch film a burying placeof the eggplant, and arranging a yellow plate on the mulch film; when whiteflies cause a yellow leaf phenomenon in a growth period of the eggplant, spraying a plant growth conditioning agent; in an early planting stage of eggplant seedlings, spraying a mixed liquid of 36% emulsifiable concentrate with a Chinese name of Kemanying, 5% flufenoxuron emulsifiable concentrate, and 1.5% abamectin emulsifiable concentrate; after the eggplant seedlings grow, observing the leaf condition frequently, and when liriomyza appears on leaves, starting to spray a mixed liquid of 25% liriomyza eliminating emulsifiable concentrate with a Chinese name of Banqianjing and 5% chlorfluazuron emulsifiable oil mixture; in the growth period of the eggplant, when stumps and dead leaves appear, spraying a mixed liquid of 2.5% deltamethrin emulsifiable concentrate, 50% pirimicarb and 20% avermection-phoxim mixture; and 3-5 days after the above mixed liquid is sprayed, spraying a mixed liquid of 73% comite emulsifiable concentrate and 40% Rogor emulsifiable concentrate. The eggplant planting method disclosed by the present invention can prevent pests and increase eggplant yield.

The invention discloses a pirimicarb and pymetrozine composition and a water dispersible granule thereof. The composition takes the pirimicarb and pymetrozine as active components; wherein, the mass ratio of the pymetrozine to the pirimicarb is 3:1-1:10. The water dispersible granule comprises the following components by weight percent: 5-50 pymetrozine, 5-60 pirimicarb, 0.5-30 dispersants, 1-10 wetting agents, 0.1-8 binders, 0.1-5 stabilizers, 1-15 disintegrants, 0-5 penetrants, a pH value regulator and balance of fillers; wherein, the pH value regulator regulates the pH value from 5 to 7. After the invention mixes the two insecticides with different mechanisms, the insecticidal effect is improved, the drug dosage is reduced, and the occurrence of resistance to drugs can be postponed and reduced; meanwhile, the number of times of pesticide application by farmers is reduced, the drug cost is lowered and the application is convenient. The composition of the invention is especially applied to preventing and curing Nilaparvata lugens (stal).

The invention discloses a synthetic method of a potentiometric pesticide sensor, and belongs to a molecular imprinting technology. The synthetic method comprises the following steps: (1) dissolving chloromethylated polysulfone (CMPSF) into dichloromethane, adding dimethylacetamide TDMAC, pouring into a glass culture dish, performing film casting, and immersing into ethidene diamine for amination to prepare an ammoniated polysulfone (AMPSF) membrane with amino on the surface; (2) dissolving absolute ethyl alcohol, sodium styrenesulfonate (SSS) and pirimicarb into water, and adding the AMPSF membrane, an initiator, namely ammonium persulfate and a crosslinking agent, namely bisacrylamide MBA to obtain a pirimicarb molecule-imprinted membrane MIM; (3) establishing the sensor. The grafting-type imprinted membrane has specific recognition selectivity and excellent binding affinity for pirimicarb template molecules, and has the binding capacity as high as 92 microgram / cm<2>; the potentiometric sensor established by using the pirimicarb molecule-imprinted membrane as a sensitive membrane is simple and quick in establishment process and sensitive and accurate in detection.

The invention provides a method for detecting drug resistance of rhopalosiphum aphids. The method comprises the following steps: producing a diagnostic glass tube at a diagnostic dose of a drug; rapidly detecting the drug resistance level of a rhopalsiphum aphid population in a field, wherein the drug is imidacloprid, pirimicarb, omethoate or high-efficiency cypermethrin; the diagnostic dose of the drug is as follows: the diagnostic dose of the imidacloprid is 898 ng / cm<2>, the diagnostic dose of the pirimicarb is 18 ng / cm<2>, the diagnostic dose of the omethoate is 170 ng / cm<2>, and the diagnostic dose of the high-efficiency cypermethrin is 3077 ng / cm<2>. The method is easy and convenient to use and visual and clear in result, and is applicable to rapid field detection of the resistance level of the rhopalosiphum aphids; by the method, the defects that in the conventional biodetection method, a large number of samples are used, operations are cumbersome, much time is used and the like are overcome; the method can be used for rapidly detecting the resistance level of the rhopalosiphum aphid population in the field.

The invention provides a method for purifying and detecting pirimicarb by utilizing a molecularly imprinted polymer (MIP), belonging to the biochemical technical field. The method comprises the following steps: mixing and dissolving pirimicarb template molecules, a functional monomer of trifluoromethyl acrylic acid and a cross-linking agent of ethylene glycol dimethacrylate in heptane, and addingan initiator of 4,4'-azo-2(4-cyanovaleric acid)-silica gel to the obtained mixed solution; filling up nitrogen for 5-10 minutes, sealing an ampoule under protection of the nitrogen, carrying out water bath and heat preservation at 65-70 DEG C for reacting for 20-30 hours, and then removing the template molecules through soxhlet extraction; drying the polymer without the template molecules at 60 DEG C for staying overnight to obtain the MIP of the pirimicarb; filling the MIP of the pirimicarb into a solid-phase extraction column tube; and activating a solid-phase extraction column, adding sample fruit and vegetable extracting solution, washing the solid-phase extraction column, eluting, purifying and finally collecting the pirimicarb. The method of the invention can make up the pretreatment disadvantage for detecting the pirimicarb in the existing fruit and vegetable environment, simply, rapidly, specifically and efficiently enrich and purify a trace amount of the pirimicarb, and improve the existing detection sensitivity.

The invention relates to a method for simultaneously degrading three types of carbamic acid ester pesticides, namely, meta-tolyl-N-meth ylcarbamate, carbofuran and pirimicarb by a Fenton method. The method is characterized by comprising the following steps: (1) firstly, putting an aqueous solution containing three types of pesticides, namely, meta-tolyl-N-meth ylcarbamate, carbofuran and pirimicarb at the same time into a container; (2) weighing FeSO4 under the condition that the ratio of the total mass of the three pesticides to the mass of the FeSO4 is (2.08 to 3.12mg) to 1g, adding the weighed FeSO4 into the solution, mixing uniformly, then rapidly adding 30 percent H2O2 into the uniformly-mixed solution under the condition that the ratio of the total mass of the three pesticides to thevolume of the 30 percent H2O2 is (0.42 to 0.50mg) to 1mL, mixing uniformly, continually stirring for 2 to 3 hours, and lastly filtering with a microfiltration membrane of 0.22 to 0.45 mu m. Through the method for degrading the three types of carbamic acid ester pesticides by the Fenton method, a better effect is achieved.

The present invention relates to a microemulsion dosage using pirimicarb as active component and its preparation method. Its composition includes (wt%) 5%-20% of primicarb, 10%-20% of surfactant, 10%-30% of organic solvent, 5%-15% of cosolvent, and the rest is water.

The invention discloses an insecticidal composition for preventing and controlling insect pests with piercing-sucking mouthparts and relates to the technical field of pesticides. The insecticidal composition consists of an insecticidal activity compound I and an insecticidal activity compound II, wherein the insecticidal activity compound I is thiobenzamide with the chemical name of 3-bromo-N-[4-chloro-2-methyl-6-(methylaminothiocarbamoyl) phenyl]-1-(3-chloropyridine-2-yl)-1H-pyrazol-5-formamide; and the insecticidal activity compound II is selected from one of pymetrozine, isoprocarb, fenobucarb, carbosulfan, benfuracarb, pirimicarb, methomyl and meta-tolyl-N-methylcarbamate. The composition disclosed by the invention has an obvious synergistic effect compared with a single insecticide, the insect pests with piercing-sucking mouthparts can be effectively prevented and controlled, the application dosage of the pesticides is reduced, the application cost is saved, the defects of the single insecticide and the tolerance of insect pests on the insecticide are overcome, and the insecticidal activity is improved.

The invention discloses an insecticide composition containing chlorine chlorfenapyr and pirimicarb as active ingredients, wherein the weight ratio of the active ingredient chlorine chlorfenapyr to the active ingredient pirimicarb is (1-30):(1-30), and the total weight of the active ingredients is 1-60% in the total weight of the composition. The dosage form of the composition includes wettable powder, water dispersible granule, a suspending agent, emulsion in water and a micro-capsule suspending agent. The composition has double function mechanisms of chlorfenapyr and pirimicarb, and the occurrence of drug resistance of injurious insects is delayed and overcome. The synergism is remarkable, the dosage is reduced, the cost is reduced and the insecticidal spectrum is increased. The composition can not only be used for preventing and treating plutella xylostella, prodenia litura, rice planthopper, cotton bollworm, rice leaf folder and other injurious insects, but also can prevent and treat aphid and the like on vegetables, tobaccos and grain crops. The application range is enlarged, the composition is suitable for prevention and treatment of a plurality of lepidoptera, homoptera and dipteral injurious insects of fruit trees, vegetables, gains, tobaccos and the like.

The invention relates to a strawberry pest control method. The strawberry pest control method comprises an ecological control method, namely, residual branches and leaves and weeds in an orchard are removed, yellow sticky boards, deinsectization lamps and pest-proof nets are used for trapping and killing pests, and encarsia formosa gahan is released for trapping and killing pests; the strawberry pest control method further comprises a pesticide control method, namely, Pirimicarb wettable powder or sword-surpassing missible oil or other pesticide with the same effect is used for killing aphids or fenvalerate or amitraz missible oil or other pesticide with the same effect is used for killing mite pests, and pesticide dosage is carried out for trapping and killing underground pests.

The invention relates to a method used for simultaneous decomposition of three carbamate pesticides, including tsumacide, carbofuran, and pirimicarb via O3 / H2O2 synergistic oxidation. The method comprises following steps: 1, aqueous solutions of tsumacide, carbofuran, and pirimicarb are introduced into a container; 2, KI is weighed and introduced into a tail gas absorption bottle at a mass ratio of the three pesticides to KI of 0.42-1.25mg:1g, 30% H2O2 is added into the aqueous solutions of the three pesticides at a total mass amount of the three pesticides to the volume amount of 30% H2O2 of0.42-0.50mg:1ml, an obtained mixture is mixed to be uniform, the pH value is adjusted with NaHCO3 to 5.6 to 9.2, stirring is carried out, an ozone generator is turned on, and O3 / H2O2 synergistic oxidation is carried out. According to the method, excellent effect is achieved via decomposition of the three carbamate pesticides via O3 / H2O2 synergistic oxidation.

The invention discloses a method for detecting the content of pirimicarb in food by combining sulfur-doped carbon quantum dots with an enzyme inhibition method. The method comprises the following steps: S1, preparing pirimicarb standard solutions with different concentrations, and respectively adding the pirimicarb standard solutions into a crushed blank food sample; extracting by using water-soluble DES, adding acetylcholin esterase into an extracting solution, culturing, adding acetylthiocholine iodide, a pH buffer solution and S-CQDs, and culturing at constant temperature again; measuring fluorescence values of solutions with different concentrations, and drawing a standard curve; s2, extracting the crushed food to be detected by adopting water-soluble DES; s3, taking the extracting solution obtained in the step S2, and operating according to the step S1 to obtain the fluorescence intensity of the system; obtaining the fluorescence according to a standard curve and the measured fluorescence intensity. The extracting solution of the water-soluble DES is mutually soluble with a subsequent detection system, and the surface of the S-CQDs contains a large amount of negative charges which can generate electrostatic interaction with a hydrolysate thiocholine (+) of acetylthiocholine to cause fluorescence quenching; pirimicarb can inhibit enzyme activity, system fluorescence is enhanced, and quantitative detection is achieved.

The invention discloses a preparation method of pirimicarb microcapsules. The preparation method comprises the following steps: (1) carrier preparation: performing a polymerization reaction of succinic acid, butanediol and lactic acid in a molar ratio of 1:1:(0.2-0.3) to obtain a carrier PBS-co-PLA; (2) oil phase preparation: weighing the components PBS-co-PLA, pirimicarb and dichloromethane in a mass ratio of (3.5-4.5):1:10; dissolving the carrier PBS-co-PLA in dichloromethane; and after complete dissolution, adding pirimicarb raw medicine and dissolving to obtain an oil phase; (3) water phase preparation: weighing deionized water in a mass ratio of a water phase to the oil phase being (5-7):1, adding an emulsifier and a dispersing agent and dissolving to obtain the water phase; and (4) microcapsule preparation: adding the oil phase into the water phase to obtain an oil-water mixed emulsion; adding an antifoaming agent and curing to obtain a microcapsule suspension; and washing and removing the supernate and drying to obtain a finished product. The method is simple in technology and environmentally friendly. The obtained pirimicarb microcapsules have relatively good form, the encapsulation efficiency reaches 78%, the pesticide loading capacity is up to 50%, the effective release period is 30 days, the pesticide release amount is 94%, and thus the pirimicarb microcapsules are an ideal pesticide slow-release agent.

The invention relates to a pirimicarb-dimethachlon compound pesticide which is prepared by the following steps: diluting 25% pirimicarb by 2000 times, diluting 40% dimethachlon by 500 times and compounding the two in a weight ratio of 1:1. The compound pesticide also can be added with other components in percentage by weight: 5-10% of surfactant, 1.2-2.5% of sun-screening agent, 1.0-3.0% of stabilizer, 1.0-1.2% of preservative, 0.5-3.0% of synergist and 0.1-0.2% of pH regulator. Laboratory tests and field efficacy trials prove that the compound pesticide has a remarkable synergistic effect and can effectively prevent and control myzus persicae and brown spot while the aims of improving efficacy and reducing the pesticide use and lowering the production cost are achieved.

The invention discloses a method for using a calamus fly eradication composite. The method comprises the steps that A, a stock solution is taken to be used, wherein the stock solution comprises metolachlor, cypermethrin, omethoate, baicalin, pirimicarb, stearic acid, ethirimol and coumaphos; B, at the early stage of fly attack, due to the fact that eggs are mainly laid on the back sides of leaves, the stock solution is diluted to 1000 times of the volume to be sprayed, wherein the stock solution is sprayed once every three days for 3-5 times totally; C, at the adult stage, the stock solution is diluted to 1300 times of the volume to be sprayed; D, after temperature is higher than 26 DEG C, spraying interval needs to be prolonged, and the number of times of spraying needs to be increased, wherein spraying is continuously conducted once every four days for 4-5 times totally. The method is simple, material matching is easy, using is convenient, leaf miner control effect is good, and control effect is improved by 12-16% compared with that of traditional pesticides.

The invention provides a method for detecting insecticide resistance of green peach aphids. The method includes under a diagnostic dose, adopting a microplate reader kinetic method to detect resistance of field population individuals of the green peach aphids to organophosphorus or carbamate insecticide, wherein the organophosphorus insecticide is omethoate whose diagnostic dose is 180.43 muM, and the carbamate insecticide is pirimicarb whose diagnostic dose is 18.85 muM.

The invention discloses a method for measuring the residual amounts of pirimicarb and mtabolites thereof in a cabbage. The method comprises the following steps of: weighing 10 grams of sample accurately to 0.01 gram, adding 20 milliliters of water and 30 milliliters of acetonitrile, performing oscillation for 30 minutes, filtering the oscillated solution into a separating funnel, adding 20 milliliters of acetonitrile to wash residues, filtering washing liquid into the separating funnel, adding 10 grams of sodium chloride, performing the oscillation for 2 minutes, standing the oscillated solution for 5 minutes, discarding a water phase on a lower layer after the oscillated solution is demixed, concentrating an acetonitrile phase on an upper layer under reduced pressure until dryness, adding 2 milliliters of methanol, performing whirling for 1 minute, causing the solution to pass through a filtration membrane of 0.22 mu m, transferring the filtered solution into a small sample introduction bottle, and finally performing detection by adopting ultra performance liquid chromatography-tandem mass spectrum (UPLC / MS / MS). The method for measuring the residual amounts of the pirimicarb and the mtabolites thereof in the cabbage is put forward for the first time, and has the characteristics of high speed, low cost, high accuracy, high stability and high reliability.