43 results about "Tebuthiuron" patented technology

The invention discloses sugarcane field herbicide for low-volume spraying. The herbicide is in a form of a suspending agent; the pesticide ingredients include ametryn and herbicide II, wherein the herbicide II is prepared from one or combination of two of agroxone, diuron, hexazinone, tebuthiuron, halosulfuron-methyl, trifloxysulfuron, mesotrione or topramezone. According to the sugarcane field herbicide for low-volume spraying, ametryn and the herbicide II are mixed in a certain ratio and have synergistic effect on removing weeds of a sugarcane field, and the prevention and treatment effect is obviously superior to that of single agent; meanwhile, the herbicide can be prepared into the suspending agent for low-volume spraying, and therefore, the drift possibility can be obviously reduced, and the wetting and spreading performances of the components of pesticides can be improved; the herbicide also has the advantages of labor saving, water saving, drug saving, high in efficiency, long acting, environmental protection, and low in cost; the labor intensity can be greatly alleviated; the manual drug applying efficiency is improved, the labor can be greatly released, the agricultural production cost can be reduced, and the modern level of weeding the sugarcane field can be increased.

The invention relates to a method for synthesizing tebuthiuron technical. The method adopts methylaminoformyl chloride and 5-tert-butyl-2-methylamino-1,3,4 thiadiazole to directly react to generate the tebuthiuron with the reaction formula as the above. The new method avoids using inflammable and explosive dangerous chemical methyl isocyanate with great toxicity, and is safer for production. The method reduces the requirement on equipment materials, and reduces equipment investment.

The invention discloses a method for synthesizing a tebuthiuron technical material. The method comprises the following steps: taking 5-tert-butyl-2-methylamino-1,3,4-thiadiazole as a starting material; carrying out salt forming reaction and photochemical reaction in an organic solvent to prepare N-methyl-N-(5-tert-butyl-1,3,4-thiadiazole) carbamyl chloride; and introducing monomethylamine gas into the N-methyl-N-(5-tert-butyl-1,3,4-thiadiazole) carbamyl chloride to generate the tebuthiuron. The method has the advantages of simplicity in process, low production cost, high product purity, high yield, high production safety and the like.

The invention discloses a synthesis method of a key intermediate of tebuthiuron, namely 2-methylamino-5-tert-butyl-1, 3, 4-thiadiazole. Derivatives of 4-methyl-3-thiosemicarbazide and trimethylacetic acid are taken as raw materials, and condensation and dehydration cyclization reactions are performed under acid conditions in the presence of an organic solvent medium and a hydration agent to obtain the 2-methylamino-5-tert-butyl-1, 3, 4-thiadiazole. According to the synthesis method disclosed by the invention, environmental pollution caused by a large amount of wastewater containing phosphorus, which is produced by taking phosphoric acid, polyphosphoric acid and the like as dehydration reagents, can be effectively avoided; simultaneously, the reaction yield is high, byproducts are few, and the solvent can be recovered and applied mechanically; and the synthesis method further has the advantage of very high atom economy and is in line with the direction of green chemical development.

The invention discloses a suspending agent of tebuthiuron. The suspending agent of tebuthiuron comprises the following components in percentage by weight: 20 to 50 percent of raw medicament of tebuthiuron, 0.5 to 5 percent of wetting agent, 1 to 10 percent of dispersing agent, 0.1 to 5 percent of thickening agent, 0.1 to 2 percent of defoaming agent, 1 to 10 percent of preservative, and the balance of water, wherein the dispersing agent is one or two of triphenyl ethylphenol polyethenoxy ether phosphate ester triethoxide, alkylphenol polyethenoxy ether sodium sulfonate, triphenylethylene phenol polyethenoxy ether, triphenylethylene phenol polyoxyethylene polyoxy propylene ether; and the wetting agent is fatty alcohol polyethenoxy ether and / or alkylphenol polyoxyethylene succinate sulfonate. The suspending agent is good in dispersibility and fluidity and high in suspension rate and can be directly sprayed or mixed with water in any ratio and then sprayed, so that the suspending agent is conveniently used and does not pollute the environment.

The invention discloses a weeding composition containing tebuthiuron and bromacil and applications of the weeding composition. The composition takes tebuthiuron and bromacil in a mass ratio of (1-40): (1-40) as active ingredients. The weeding composition disclosed by the invention can be used for preventing and extirpating weeds in non-cultivation areas, or used for preventing and extirpating trees and shrubs in pastures and promoting the grassland instauration, and the prevention effect is significantly higher than that achieved by independently using tebuthiuron or bromacil. The weeding composition is prepared into large granules, so that the release rate of herbicide active ingredients can be controlled, the lasting period is long, the application amount of the composition is relatively reduced, and no crop toxicity of medicament is easily caused; for the large granules, the operation of adding the large granules into water for dissolving and diluting and then applying the obtained solution in the mist spray form is not need, and the large granules can be directly spread over the fields artificially or spread on the soil surface by using planes, thereby saving time and labor, and achieving an effect of convenience and rapidness; and the large granules are not attached on the stems and leaves of crops, so that the large granules are small in drift, have small pollution to the environment, and avoid herbicide hazards due to direct contact, therefore, the weeding composition is safe to the herbicide application personnel.

The invention provides a tebuthiuron synthesis method. Tebuthiuron is obtained by reaction between 1,3-dimethylurea and 5-tert-butyl-1,3,4-thiadiazole derivatives under the alkaline condition. The tebuthiuron synthesis method solves the problems of safety risks caused by use of extremely toxic substances such as methyl isocyanate and N-methyl formylchloride, presence of phosgene or the like, difficulty in production operation in traditional methods.

A process is provided for producing a thiosemicarbazide which includes the steps of reacting an alkylamine with carbon disulphide in the presence of a base selected from N,N-diisopropylethylamine and N,N,-diisopropyl-methylamine to produce an intermediate and converting the intermediate into the thiosemicarbazide. The process has particular application to producing 4-methyl-3-thiosemicarbazide, an intermediate useful in producing the broad-spectrum herbicide tebuthiuron.

The invention discloses a novel chemical topping agent of cotton, which is characterized by containing 5wt%-80wt% of active ingredients, namely tebuthiuron and flumetralin, wherein the weight ratio of tebuthiuron to flumetralin is 1:1 to 1:30. The chemical topping agent is applicable to foliage spray before and after a full-blooming stage of cotton, and is sprayed on cotton leaves through a mechanical or manual way; with the novel chemical topping agent, manual topping is replaced by a chemical control method so as to avoid a link of manual topping, greatly relieve labor intensity of wide cotton farmers and improve the level of mechanical operation; besides, the topping agent can guarantee topping quality, enhance uniformity of a cotton field, improve labor efficiency and reduce labor input and costs, and the topping agent has an obvious yield-increasing effect.

The invention discloses a tebuthiuron-containing synergistic weeding composition. The effective components of the composition contain N-(5-tert-butyl-1,3,4-thiadiazole-2-yl)-N'-(2,6-difluoropyridine-4-yl)-N,4-dimethyl-1,2,3-thiadiazole-5-formamidine (TDCA-10) and tebuthiuron, and the effective components and pesticidally acceptable auxiliary components form the composition, wherein a weight ratio of the TDCA-10 to the tebuthiuron is 20:1 to 1:30. Indoor pot experiments and field drug effect experiments show that the two effective components are combined to form synergistic effects, enlarge the weeding spectrum, realize no antagonistic effects and improve the safety of crops.

A disclosed herbicide composition containing buthiuron and oxyfluorfen comprises the active components in percent by weight: 1%-50% of buthiuron and 0.2%-10% of oxyfluorfen. The balance is an additive. The preparation form of the composition can be wettable powder, water-soluble dispersive granules, granules, missible oil, micron emulsion, emulsion in water and suspending agents. The composition can be applied before dry-land crops such as sugarcane, peanut, corn and the like are budded, is capable of controlling majority annual weeds, overcomes the disadvantage that some annual weeds generate resistance to acetochlor at present, and helps to reduce the use amount of atrazine and attenuate the risk of atrazine on health of human and other kinds of animals.

The invention discloses a cotton defoliating agent. The cotton defoliating agent comprises tebuthiuron and magnesium chlorate according to a mass ratio of 1: 1 to 1: 100. The cotton defoliating agent provided by the invention is simple, easy to implement, and convenient in operation and large-scale production, and can effectively avoid reduction in the activity of thidiazuron at low temperature from influencing cotton defoliation, increase the cotton defoliating speed and increase the defoliating rate.

The invention discloses a cotton defoliating agent used in a later period of cotton growth. The cotton defoliating agent contains 5-75wt% of active components such as tebuthiuron and thidiazuron, and a weight ratio of tebuthiuron to thidiazuron is in a range of 1: 1 to 1: 30. The cotton defoliating agent can be processed to form environmentally friendly water dispersible granules, water suspension or dispersible oil suspension, and in spraying in the field, the water dispersible granules and water suspension can be added with 0.3-1.0% of a plant oil-type spray adjuvant for improving defoliation effects. A field defoliation application test on the cotton defoliating agent shows that compared with the conventional defoliation product thidiazuron wettable powder with thidiazuron content of 50% on the market, the cotton defoliating agent improves a defoliation rate investigated in the 15th day after treatment by 28.6-37.1% and improves a blow-of-cotton rate by 5.2-12.7%.

The invention provides a tebuthiuron synthesis method. Tebuthiuron is obtained by reaction between 1,3-dimethylurea and 5-tert-butyl-1,3,4-thiadiazole derivatives under the alkaline condition. The tebuthiuron synthesis method solves the problems of safety risks caused by use of extremely toxic substances such as methyl isocyanate and N-methyl formylchloride, presence of phosgene or the like, difficulty in production operation in traditional methods.

The invention discloses a cotton defoliant used in the later stage of cotton, which contains 5% to 75% by weight of active ingredients buthiuron and thiadiuron, wherein the weight ratio of buthiuron and thiadiuron is 1:1 to 1:30. The dosage form of the defoliant is an environmentally friendly dosage form such as water-dispersible granules, water-suspension concentrates or dispersible oil-suspension concentrates. The water-dispersible granules and water-suspension concentrates should be added to the spray liquid in the amount of 0.3%~ 1.0% vegetable oil spray aid to increase defoliation effect. The field defoliation application test of the defoliant shows that the defoliation rate investigated on the 15th day after treatment is 28.6% to 37.1% higher than that of the conventional defoliation product 50% Thidiazuron WP in the market, and the boll opening rate is increased by 5.2%. % to 12.7%.

The invention belongs to the field of pesticide, and particularly relates to a preparing method of slow-release imazapyr and tebuthiuron composite particles. The preparing method includes the following steps that imazapyr and tebuthiuron are dissolved in low-boiling-point organic solvent; expanded vermiculite and zeolite are taken and smashed into mixed carrier powder of 20-325 mesh; the mixed carrier powder is added into mixed solution to obtain imazapyr and tebuthiuron mixed carrier powder mixed solution; a binding agent is added, and the mixture continues to be stirred to be mixed uniformly; reduced pressure distillation is carried out on the imazapyr and tebuthiuron mixed carrier powder mixed solution obtained after being mixed with the binding agent uniformly, and obtained solid matter is granulated to obtain imazapyr and tebuthiuron mixed powder particles; organic solvent is recovered through reduced pressure distillation to obtain the slow-release imazapyr and tebuthiuron composite particles. The preparing method has the following advantages that chemical and physical stability is high, and mass decomposing of a technical material is avoided; the slow-release imazapyr and tebuthiuron composite particles are high in safety, small in environment pollution and convenient to process, store and transport; imazapyr and tebuthiuron are continuously and uniformly released to have the continuous synergistic effect.

The invention discloses a cotton defoliant used in the later stage of cotton, which contains 5% to 75% by weight of active ingredients buthiuron and thiadiuron, wherein the weight ratio of buthiuron and thiadiuron is 1:1 to 1:30. The dosage form of the defoliant is an environmentally friendly dosage form such as water-dispersible granules, water-suspension concentrates or dispersible oil-suspension concentrates. The water-dispersible granules and water-suspension concentrates should be added to the spray liquid in the amount of 0.3%~ 1.0% vegetable oil spray aid to increase defoliation effect. The field defoliation application test of the defoliant shows that the defoliation rate investigated on the 15th day after treatment is 28.6% to 37.1% higher than that of the conventional defoliation product 50% Thidiazuron WP in the market, and the boll opening rate is increased by 5.2%. % to 12.7%.

The invention discloses a preparation method of a compound pesticide for controlling vegetable leaf miner, which comprises the following steps: A. preparing 40% diazinon missible oil, 50% dichlorvos missible oil, tea polyphenol, radix astragali polysaccharide, phillyrin, tebuthiuron, nitenpyram and coumaphos; B. diluting the 40% diazinon missible oil and 50% dichlorvos missible oil to a 50-time solution with water, adding the c tebuthiuron, tebuthiuron and coumaphos, and stirring uniformly; C. diluting the tea polyphenol, radix astragali, polysaccharide and phillyrin to a 10-time solution with water, and stirring uniformly; and D. mixing the substances obtained in the step B and step C, and sterilizing to obtain the compound pesticide for controlling vegetable leaf miner. The preparation method is simple; and the prepared product is simple in proportioning and convenient to use, and has favorable control effect on leaf miner. The traditional Chinese medicine intermediates and pesticide intermediates are added on the basis of the traditional pesticide and mixed to obtain the new pesticide for leaf miner with favorable control effect, and the control effect is enhanced by 15-18% as compared with the traditional pesticide.

The invention discloses a phytomyza atricornis killing composition capable of avoiding lawn damage. The phytomyza atricornis killing composition is prepared form, by weight, 3-6 parts of metsulfuron-methyl, 3-6 parts of 2,4-dichlorphenoxyacetic acid, 2-5 parts of tea polyphenol, 1-3 parts of astragalus polysaccharide, 2-4 parts of 70% sodium salt raw powder, 2-5 parts of tebuthiuron, 1-3 parts of nitenpyram and 3-6 parts of dinitraniline. The phytomyza atricornis killing composition is simple in matching, convenient to use and good in phytomyza atricornis prevention and control effect. According to the phytomyza atricornis killing composition, traditional Chinese medicine intermediates and agrochemical intermediates are added on the basis of traditional pesticide, the traditional Chinese medicine intermediates and agrochemical intermediates are mixed, then new drugs targeted to the phytomyza atricornis are obtained, the prevention and control effect is good, and the prevention and control effect is raised by 18%-20% compared with traditional pesticide.

The invention discloses a synergism weeding composition. The synergism weeding composition comprises 2-(6-fluorine-2-pyridine acyloxy)-N-(4-fluorophenyl)-N-(1-methyl ethyl) thioacetamide ((b)TAM-5( / b)) and tebuthiuron which serve as the effective components and auxiliary components acceptable in pesticide, wherein the weight ratio of TAM-5 to the tebuthiuron is 40:1-1:60. The synergism weeding composition has the advantages that the two effective components are combined to form synergism, the herbicide controlling spectrum can be expanded, antagonism is avoided, and safety to crop is increased; the synergism weeding composition is applicable to weeding of farmland such as corn fields, sugar cane fields, rape fields and tea gardens and non-farmland and capable of evidently increasing weeding effect and lowering cost; when the synergism weeding composition is applied to the sugar cane fields for selective weeding, good weeding effect is achieved, chemical damage to sugar canes is avoided, and the synergism weeding composition is especially suitable for the selective weeding of the sugar cane fields.

The invention provides a weeding composition with fluoroglycofen-ethyl. The weeding composition comprises the following components in parts by weight: 20 parts of fluoroglycofen ethyl, 5-50 parts of flazasulfuron, 5-50 parts of tebuthiuron, 10-80 parts of pendimethalin and 10-80 parts of mesotrione. Wide research made by the inventor shows that by adopting the weeding composition provided by the invention, the effects of active weeding components can be improved, the pesticide resistance of weeds can be degraded, in addition, the use dosage of the weeding composition can be reduced, and thus the burden of weeding agent application points and environments around can be alleviated.

The invention provides application of wettable powder with fluoroglycofen; the wettable powder with fluoroglycofen is applied to weeding; an active ingredient in the wettable powder is a composition with fluoroglycofen; the composition with fluoroglycofen is prepared from, by weight, 20 parts of fluoroglycofen, 5-50 parts of flazasulfuron, 5-50 parts of tebuthiuron, 10-80 parts of pendimethalin, and 10-80 parts of mesotrione. Through extensive studies, the inventor discovers that the application of the wettable powder with fluoroglycofen in weeding provides significant effect, agent resistance in weeds can be decreased, usage is low, and less environmental burden on herbicide application sites or their surroundings than the prior art is caused.

The invention belongs to the field of pesticide, and especially relates to a method for preparing a slow release-type tebuthiuron granular herbicide. The method comprises the following steps: dissolving tebuthiuron in a lower boiling organic solvent; taking expanded vermiculite and zeolite, crushing the materials to mixed carrier powder with 20-325 mesh; adding the mixed carrier powder in a tebuthiuron solution to obtain tebuthiuron-carrier powder mixed liquor; adding the tebuthiuron-carrier powder mixed liquor in an adhesive, continuously stirring the materials for 0.1-0.6 h until the materials are uniformly mixed; performing underpressure distillation on the tebuthiuron-carrier powder mixed liquor after being uniformly mixed with the adhesive, granulating the obtained solid to obtain the tebuthiuron-carrier powder particles; and performing reduced pressure distillation to recover the organic solvent to obtain the slow release-type tebuthiuron granular herbicide. The method has the following advantages that 1) the chemical and physical stability is good, massive decomposition of an original drug can be avoided; 2) security is good, pollution on environment is little, processing, storage and transport are convenient; and 3) tebuthiuron can be continuously and uniformly released to perform continuous weeds removing effect.