46 results about "Pirimicarb" patented technology

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 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 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 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 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 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 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.