The invention belongs to the technical field of insecticide application, and particularly relates to an insecticidal combination containing chlorofluoro cyantraniliprole and fipronil The insecticidal combination is formed by using chlorofluoro cyantraniliprole and fipronil as active ingredients for bi-element compounding, and a mass ratio of chlorofluoro cyantraniliprol to fipronil is 1:50-50:1 The insecticidal combination has obvious synergistic effect, and prevention and control effect of the insecticidal combination is obviously better than that when a single preparation is used solely, so that insecticide consumption is lowered, prevention and control cost is lowered, insecticide resistance of pests is delayed, and environment pollution is reduced

Insecticidal combination containing chlorofluoro cyantraniliprole and fipronil

The invention relates to the field of pesticide, and discloses an insecticide composition. The active ingredients of the insecticide composition comprise SYP-9625 and semiamitraz with the mass ratio of (50: 1) to (1: 50), preferably (5: 1) to (1: 2). The insecticide composition disclosed by the invention can be prepared into a suspending agent, wettable powder and water dispersible granules. Afterthe two active ingredients of the insecticide composition are compounded, an outstanding synergistic effect is achieved in a certain range, the dosing pesticide can be reduced, and the cost is reduced; the resistance can be retarded; and the insecticide composition is high in safety and environmentally friendly.

Insecticide composition containing SYP-9625 and semiamitraz

The invention discloses a method for controlling maize spider mite. In the early onset stage of the corn lead mites, the drug is applied to the maize between the lines in a method of pesticide-clay mixture. The characteristic is that the active pharmaceutical ingredient of the drug consists of chlorfenapyr and diafenthiuron according to the weight ratio of 2: 1-2. Compared with the prior method for controlling maize spider mites, the method has the advantages of simple operation and desirable control effect.

Method for controlling maize spider mites

The invention relates to the technical field of synthesis of methylthiazole, in particular to a synthesis reaction system of 2-chloro-5-chloromethylthiazole. Impurities are produced due to chemical reactions, so reaction time and subsequent treatment of reaction substrates are influenced. According to the method, 2-amino-5-methylthiazole dissolved by an organic solvent and a sodium nitrite solution are mixed in a mixing device when raw materials enter a reaction kettle, so organic matters form oily small liquid drops, and the oily small liquid drops are easier to contact and react with hydrogen chloride gas when being injected into the reaction kettle; a plurality of through round holes are formed in a dispersing device used at the top of the reaction kettle, mixed liquid directly falls onto the dispersing device after being sprayed out of an ejector, and then the mixed liquid is slowly sprayed into the reaction kettle through the round holes in the dispersing device, so the contact time of hydrogen chloride gas and the mixed liquid is prolonged, the gas is easier to dissolve, and production efficiency is improved; the hydrogen chloride gas is used as a chlorinating agent, so aftera reacted filtrate is simply treated, the main component in the filtrate is hydrochloric acid; and the filtrate can be reused in a mixing device, so cost is saved.

Synthesis reaction system of 2-chloro-5-chloromethylthiazole

/pdf/crystal-structure-of-1-tert-butyl-3-2-6-diisopropyl-4-1a8fmw32oy.pdf

Crystal structure of 1‐tert‐butyl‐3‐(2,6‐diisopropyl‐4‐phenoxyphenyl)‐2-methylisothiourea, C24H34N2OS

The invention provides a methylthio-diafenthiuron pesticide having a chemical structure shown below and application of methylthio-diafenthiuron as an active ingredient in the preparation of agricultural pesticides The methylthio-diafenthiuron pesticide is effective in preventing and controlling Lepidoptera and Homoptera pests The methylthio-diafenthiuron pesticide has the advantages that pesticidal spectrum and bactericidal spectrum are wide, pest-killing and bactericidal times are short, the effect is lasting, a synthetic process is simple, the cost is low, and compounding effect is good

Methylthio-diafenthiuron pesticide and application thereof

The invention relates to a miticidal composition containing SYP-9625 and semiamitraz. The effective component of the miticidal composition is a mixture of SYP-9625 and semiamitraz in a mass ratio of (1-50): (50-1). In the miticidal composition, SYP-9625 and semiamitraz account for 1 to 80% of the total mass of the miticidal composition, with the balance being adjuvant components allowable and acceptable in pesticides; and the dosage form of the miticidal composition may be a missible oil, a suspending agent, a wettable powder, a water-dispersible granule, an emulsion in water, a micro-emulsion, a granule and a microcapsule. The miticidal composition is applicable to prevention and treatment of main mites parasitizing crops like fruit trees, vegetables and tea trees and flowers.

Miticidal composition containing SYP-9625 and semiamitraz

The invention discloses a method for preparing methylmercaptodiafenthiuron. The method comprises the following reaction formula described in the specification, wherein in the formula, a methylation reagent is selected from methyl chloride, methyl bromide, methyl benzenesulfonate, methyl trifluoromethansulfonate, methyl p-toluenesulfonate, dimethyl carbonate, trimethyl phosphate, dimethyl sulfate, diazomethane, methyl trichloroethanimidate, and formaldehyde+formic acid; an alkali is selected from M2CO3, NCO3, MHCO3, MXR1, N(XR1)2, MH, NH2 or NO; M is selected from Li, Na or K; N is selected from Mg or Ca; X is selected from O or S; R1 is selected from H or C1-C6 alkyl. The compound shown in the reaction formula undergoes a reaction with the methylation reagent and the alkali in a proper solvent to prepare the methylmercaptodiafenthiuron. According to the method, the methylation reagent with low price is used, so the product cost is reduced; and the method is mild in reaction condition, simple, convenient and feasible in post-treatment method, economic and effective, and prone to industrialized production.

Method for preparing methylmercaptodiafenthiuron

The utility model relates to a 2-chloro-5-chloromethylpyridine production device which comprises a feeding device, a reaction device and a tail gas treatment device, and the feeding device comprises astock bin and a feeding machine; the reaction device comprises a reaction kettle and a stirrer, the stirrer is arranged in the reaction kettle, and the upper end of the reaction kettle is connected with one end, far away from the motor, of the feeding pipeline; and the tail gas treatment device comprises a gas-liquid separation device, a tail gas absorption device and a methylbenzene return pipeline. According to the triphosgene feeding device, the automation degree and precision of the triphosgene feeding process are improved, and the phenomenon of material lumps can be effectively reduced;the gas-liquid separation efficiency is effectively improved, so that the recycling rate of the solvent can be improved, meanwhile, the introduction of impurities (such as organic amines) is reduced,and the adverse effect of the impurities is reduced; therefore, the pipeline is more convenient to clean, and the pipeline cleaning times in a shutdown state can be effectively reduced.

Production device of 2-chloro-5-chloromethylpyridine

The invention relates to an oxidation catalyst used for preparing 2-nitro-4-methylsulfonylbenzoic acid. The oxidation catalyst used for preparing 2-nitro-4-methylsulfonylbenzoic acid is composed of elements Mg, Mo, V, Cu, Zn, Al, K, Na, O, and S at a molar ratio of 0-0.3:0-0.02:0.03-0.3:0.004-0.4:0.002-0.07:0-0.7:0.009-0.4:0-0.03:0.1-3.0:0-0.9. A preparation method comprises following steps: appropriate amounts of vanadic anhydride or/and alumina are taken as raw materials, an appropriate amount of a sodium salt of molybdenum element, and appropriate amounts of sulfates of the other metal elements are taken as raw materials; the raw materials are mixed to be uniform, and are subjected to ball milling for 1h so as to obtain the catalyst. The catalyst is high in catalytic activity; reactionconditions are convenient to control; production cost is low; and reaction time is shortened.

Li Jianguo

Papers

Methylthio-diafenthiuron pesticide and application thereof

Miticidal composition containing SYP-9625 and semiamitraz

Method for preparing methylmercaptodiafenthiuron

Production device of 2-chloro-5-chloromethylpyridine

Oxidation catalyst used for preparing 2-nitro-4-methylsulfonylbenzoic acid