34 results about "Methidathion" patented technology

The invention discloses a methidathion Pickering emulsion in water, which is prepared by the following raw materials by weight: 0.1-1.0% of methidathion original drug, 1.0-8.0% of organic solvent, 0.05-0.5% of stabilizing agent, 5.0-12.0% of thickening agent, 0.1-0.5% of antifreeze and the balance water, wherein the sum of all components is 100%. The stabilizing agent is silica, clay, kaolin or montmorillonite. The methidathion Pickering emulsion in water utilizes a Pickering emulsion of the methidathion, uses water as a medium, uses SiO2 as a solid stabilizing agent of the emulsion, replaces a lot of poisonous and harmful organic solvents in a traditional methidathion missible oil preparation, and does not need usage of the emulsifier, thereby reducing toxicity, and implementing green and environmental protection.

The invention relates to an insecticide composition. The composition contains active ingredients and is characterized in that the active ingredients contain thiamethoxam and methidathion, wherein the weight ratio of thiamethoxam to methidathion is 1: (0.01-90). The invention further relates to an insecticide prepared from the insecticide composition. A dosage form of the insecticide is cream, water emulsion, micro-emulsion, water suspension, oil suspension, microcapsule suspension, wettable powder, water dispersible granule, soluble powder or soluble granule. The invention further relates to application of the insecticide in the prevention and control of one or more plant pests, such as scale insects, arrowhead scales, leafhoppers, thrips, aphid, white flies, mirid bugs, striped flea-beetles, leaf miners and spiny white flies. Compared with single-ingredient thiamethoxam or methidathion, the insecticide composition and the insecticide, disclosed by the invention, have a synergized action, and the prevention and control effect can be improved; due to non-single active ingredients, the insecticide resistance is difficult to produce; and multiple different species of pests occurring in a mixed manner can be prevented and controlled.

The invention discloses a method for detecting residual methidathion in a ripe orange. The method for detecting residual methidathion in the ripe orange comprises the following steps: (1) dividing a ripe orange into an orange peel part and a pulp part, cutting the orange peel into pieces, and squeezing pulp with a juice extractor to obtain juice for later use; (2) respectively putting the orange peel and pulp into conical flasks, respectively adding acetonitrile water mixed liquor, and carrying out vibrating extraction for 50-70 minutes; respectively carrying out suction filtration to obtain clear liquids; concentrating the clear liquids respectively, and realizing constant volume being 10ml again by adopting water, so as to obtain an orange peel sample and a pulp sample for later use; (3) putting neutral aluminium oxide powder into a muffle furnace, activating for 4 hours at the temperature of 680 DEG C, packing, firstly passing a column with 20ml acetonitrile, loading the samples, firstly activating a small column with 10ml mixed liquor of acetonitrile and water in a volume ratio of 1:1, then leaching with 20ml acetonitrile, collecting leacheate, carrying out rotary evaporation until volume of the leacheate is 1ml, blow-drying with nitrogen, realizing constant volume being 5ml by adopting acetone, and making preparation for detection; (4) detecting by adopting a gas chromatography.

The invention discloses a preparation method of soybean esterase used for the determination of pesticide residues in fruits and vegetables. The steps include: selecting high-quality soybeans, crushing, extracting with phosphate buffer solution, differential centrifugation, ammonium sulfate salting out and precipitation, ion exchange chromatography purification and freeze-drying. The preparation process of the invention is simple and stable, and the production cost is lower than the production cost of extracting pure enzyme products of acetylcholinesterase. The sensitivity of the soybean esterase purified by the invention is more than 19 times higher than that of the enzyme crude extract. The lowest detection limit (LDC) of monocrotophos, methamidophos, parathion, chlorpyrifos, dimethoate, malathion, trichlorfon and other pesticides can reach 0.03125ppm, and the LDC of chlorpyrifos and chlorpyrifos Even reached one thirty-second of its maximum residue limit (MRL), and the LDCs of parathion, parathion, thionon, etc. also reached one sixteenth of its MRL. The soybean esterase prepared by the invention can fully satisfy the rapid detection of various organophosphorus pesticide residues, and can be widely used as an enzyme marker for various methods of rapid detection of pesticide residues.

The invention belongs to the technical field of pesticide compounding and particularly relates to fenoxycarb-containing missible oil and application. The fenoxycarb-containing missible oil consists of fenoxycarb and methidathion as effective constituents, wherein the weight ratio of methidathion to fenoxycarb is 20:1 to 1:1; and the fenoxycarb-containing missible oil is particularly good for controlling gelechiid moths, which mainly results from a synergistic interaction effect of various constituents.

The invention belongs to the technical field of pesticide compounding, and concretely relates to a chlorfenapyr-containing missible oil and its application. The effective components of the chlorfenapyr-containing missible oil comprise chlorfenapyr and methidathion, wherein a weight ratio of methidathion to chlorfenapyr is 20:1-1:1. The chlorfenapyr-containing missible oil has a good prevention and control effect especially on tea lesser leafhopper under the synergistic effect of the above components.

The invention relates to an ultra-low volume liquid containing cyantraniliprole and organophosphorus insecticides. The liquid is compounded by cyantraniliprole and an active ingredient II into a chemical component, and other components are surfactants and solvents; the active ingredient II is any one of fenitrothion, trichlorfon, parathion methyl, isazofos, pyridaphethione,quintiofos, triazophos,colophonate, diazinon, phoxim, sumithion, pirimiphos methyl, fenthion, cyanophos, profenofos, chlorpyrifos, chlorpyrifos methyl, prothiofos, sulprofos, dimethoate, malathion, methidathion or isocarbophos. The ultra-low volume liquid has the advantages of convenience in processing, long duration, high work efficiency, low possibility of generating resistance to pesticides by a target, low environmental contamination, economy of drug and water, and improvement in pesticide utilization rate; and through ultra-low volume spraying, low volume spraying or ultra-low volume static spraying, a varietyof pests of rice, wheat, corn, vegetables, tobacco, tea trees, fruit trees and sugarcanes can be prevented and treated.