346 results about "Metolachlor" patented technology

The invention relates to safety herbicide for a corn field. An active ingredient of the safety herbicide is prepared by mixing topramezone and one or more than one of atrazine, ametryn, amides active compound, the mass ratio of topramezone to atrazine is 0.5-8:1-30, the mass ratio of topramezone to ametryn is 0.5-8:1-30, and the mass ratio of topramezone to amides active compound is 0.5-8:1-30. The amides active compound is alachlor, pretilachlor, butachlor or metolachlor. The topramezone has remarkable synergistic effect after adding atrazine / ametryn, the herbicide has good prevention and control effect on weeds and has good preventing and removing effect on malice broad leaf weeds such as cirsium setosum, chicory, acalypha australis and dayflower. The topramezone has a wide weed control spectrum, is safe for the height of corns, and can effectively synergize after combining the atrazine and the like. After combination, use amount of atrazine alone is reduced, and safety of the corns is improved.

The invention relates to a high performance liquid chromatography-tandem mass spectrometry measuring method of three amide herbicides (i.e., alachlor, metolachlor and napropamide) in tobacco and tobacco products, which belongs to the technical filed of physical and chemical inspection of pesticide residue in the tobacco and tobacco products. The high performance liquid chromatography-tandem mass spectrometry measuring method is characterized by being the method which is used for directly extracting the pesticide residue by a substrate dispersion solid-phase extraction method to directly measure the pesticide residue in the tobacco and tobacco products by virtue of chromatography-tandem mass spectrometry. The high performance liquid chromatography-tandem mass spectrometry measuring method of three amide herbicides in tobacco and tobacco products disclosed by the invention can be used for overcoming the defects of the sample treatment method in the prior art, and optimizing the sample pre-treatment method and the apparatus detection condition for the tobacco sample. Moreover, compared with the prior art, the method disclosed by the invention has the excellent effects that the sample pre-treatment process of the method is simple and quick, capable of reducing the interferences of the impurities including pigment and the like in the tobacco, and provided with the advantages of being accurate to operate, high in flexibility and good in repeatability.

The invention discloses an asymmetric catalytic hydrogenation method of imine. Chiral amine is prepared through asymmetric hydrogenation of the imine through using a complex as a catalyst in the presence of an iodate or iodine under the co-action of an acid, wherein the complex is prepared through an in-situ reaction of {(R)-1-[(S)-2-di-phenyl-phosphino-ferrocene]}-propyl-di-(3,5-dimethyl-phenyl)phosphine and an iridium complex; and the proper molar ratio (s / c) of the raw material imine to the catalyst is 100-500000. The method has the advantages of easily available ligand, convenience of large-scale preparation, simple operation, and realization of continuous operation, is suitable for the large-scale preparation of the chiral amine, enables the e.e value of the chiral amine to be above 70%, completely satisfies requirements of a pesticide intermediate, is especially suitable for preparing chiral intermediates of a pesticide S-metolachlor, and has a very good industrial practicality.

The invention discloses a special medicinal fertilizer for overwintering pisum sativum and a production method thereof. The production method of the special medicinal fertilizer is characterized by mixing and granulating urea, calcium superphosphate, Sugumi potassium, ammonium molybdate, borax and DMPP to obtain inner cores, pelletizing for two times, and coating with a coating agent, wherein the components pelletized for the first time comprise urea, monoammonium phosphate, Sugumi potassium, compound potassium nitrophenolate, the solution of tea saponin and nicotine, matrine, DMPP and a colloidal suspension, the components pelletized for the second time comprise urea, a calcium, magnesium and phosphate fertilizer, Sugumi potassium, a chelated salt of amino acid and trace elements, borax, DMPP and a colloidal suspension, and the components of the coating agent comprise imidacloprid, Dual metolachlor, a film forming agent, pearl powder, titanium dioxide and a dye. Through one-time coating, two-time granulating and three-time controlled-release material using, the effective period of urea can be prolonged to 170 days from 15 days or so. The special medicinal fertilizer disclosed by the invention has the effects of weeding, killing insects, promoting the growth of plants and increasing the fruit setting rate of plants.