阅读说明：本技术 稻田杂草防治用复配型除草剂及其制备方法 (Compound herbicide for preventing and controlling weeds in rice field and preparation method thereof ) 是由 李玉洁 李冰清 李多才 于 2019-12-06 设计创作，主要内容包括：本发明涉及除草剂制备技术领域,特别涉及一种稻田杂草防治用复配型除草剂及其制备方法；本发明以五氟磺草胺、莎稗膦和乙氧磺隆作为原料,且三者按照重量比2~4:30~50:2~4混合,不仅提高五氟磺草胺衍生物的药性,即在原有的基础上进一步提高对稗草和莎草植物的药效,使得除草剂的药效增加,其能对水稻田内的一年生禾本科、阔叶和莎科杂草均具有很好的杀除效果,提高其经济效益；通过表面活性剂与填料的使用,表面活性剂提高该复合型除草剂的穿透性能,进而提高药效,同时填料中众多营养元素可为稻子提供药肥支撑,且本发明制备的除草剂可直接播撒至稻田,相比较于传统的喷雾施药方法,在施用本发明制备的除草剂时更加地省时、省工和省力。(The invention relates to the technical field of herbicide preparation, in particular to a compound herbicide for preventing and controlling weeds in rice fields and a preparation method thereof; according to the invention, penoxsulam, anilofos and ethoxysulfuron are used as raw materials, and the penoxsulam, anilofos and ethoxysulfuron are mixed according to the weight ratio of 2-4: 30-50: 2-4, so that the drug effect of the penoxsulam derivative is improved, namely, the drug effect on the anilofos and cyperus plants is further improved on the original basis, the drug effect of the herbicide is increased, the herbicide has a good killing effect on annual gramineous, broad-leaved and cyperus weeds in a paddy field, and the economic benefit of the herbicide is improved; through the use of the surfactant and the filler, the surfactant improves the penetrating performance of the compound herbicide, so that the pesticide effect is improved, meanwhile, a plurality of nutrient elements in the filler can provide pesticide and fertilizer support for rice, and the herbicide prepared by the invention can be directly spread to a rice field.)

1. A compound herbicide for preventing and controlling weeds in rice fields is characterized in that: the compound herbicide comprises the following components in parts by weight: 8-12 parts of a mixed medicament, 3-4 parts of 1, 2, 4-triazolo [1, 5-a ] pyrimidine-2-sulfonamide, 2-5 parts of benzofuranone, 4-6 parts of a wetting agent, 5-7 parts of a binder, 3-7 parts of a surfactant, 10-15 parts of a coating agent, 80-100 parts of a filler and 30-40 parts of deionized water;

the mixed reagent is prepared by mixing penoxsulam, anilofos and ethoxysulfuron according to the weight ratio of 2-4: 30-50: 2-4.

2. The compound herbicide for controlling weeds in rice fields according to claim 1, wherein: the wetting agent is one or the combination of two of alkyl naphthalene sulfonate-anion wetting agent and lauryl sodium sulfate.

3. The compound herbicide for controlling weeds in rice fields according to claim 1, wherein: the adhesive is one or a mixture of carboxymethyl cellulose and glucose.

4. The compound herbicide for controlling weeds in rice fields according to claim 1, wherein: the coating agent is one or a mixture of paraffin and resin.

5. The compound herbicide for controlling weeds in rice fields according to claim 1, wherein: the surfactant is one or a mixture of two of dilauryl dimethyl ammonium chloride and dicocoyl dimethyl ammonium chloride.

6. The compound herbicide for controlling weeds in rice fields according to claim 1, wherein: the preparation process of the filler comprises the following steps:

drying and grinding 20-30 parts by weight of ammonium sulfate, 10-20 parts by weight of monopotassium phosphate, 10-20 parts by weight of sodium chloride and 10-15 parts by weight of water-soluble starch, sieving by 50-100 meshes, and uniformly mixing the sieved ammonium sulfate, monopotassium phosphate, sodium chloride and water-soluble starch;

and (b) uniformly mixing 5-10 parts of disintegrating agent, 8-12 parts of dispersing agent and the mixture obtained in the step (a) to obtain the filler.

7. The compound herbicide for controlling weeds in rice fields according to claim 6, wherein: the disintegrating agent is one or a mixture of two of sodium carboxymethyl starch and croscarmellose sodium.

8. The compound herbicide for controlling weeds in rice fields according to claim 6, wherein: the dispersant is one or two of naphthalene sulfonate formaldehyde condensate and methyl naphthalene sulfonate formaldehyde condensate.

9. The method for producing a herbicide formulation for controlling weeds in rice fields according to claim 1, comprising the steps of:

s1: adding penoxsulam and 1, 2, 4-triazolo [1, 5-a ] pyrimidine-2-sulfonamide into 20-30 parts of diethyl ether and 60-80 parts of ethyl formate, stirring for 3-4 h at 50-60 ℃, then slowly dropwise adding 3-5 parts of thionyl chloride, stirring for 10-20min at room temperature, pouring the reaction liquid into ice water, carrying out ice bath for 5-8 min, heating to room temperature, extracting with diethyl ether for three times, combining organic phases, adjusting to be neutral by using weak acid, spin-drying and drying to obtain the penoxsulam derivative;

s2: carrying out air flow crushing on the penoxsulam derivative, the benzofuranone, the anilofos and the ethoxysulfuron obtained in the step S1, and uniformly mixing to obtain a mixed medicine;

s3: slowly dripping the surfactant into deionized water at room temperature within 10-20min, and stirring at the speed of 500-;

s4: uniformly mixing the mixed medicine obtained in the step S2 with a wetting agent, a coating agent and a filler, kneading the mixture with the mixed liquid obtained in the step S3 in a kneading machine at room temperature for 1-2h, and then feeding the kneaded mixture into a granulator for granulation to obtain preliminary compound herbicide granules;

s5: drying the preliminary compound herbicide granules obtained in the step S4 at 50-60 ℃ for 20-30min to obtain compound herbicide granules;

s6: and (4) carrying out moisture detection on the compound herbicide granules obtained in the step (S5), and returning to the step (S5) to carry out drying again if the moisture content is more than 3%.

Technical Field

The invention relates to the field of herbicide preparation, and particularly relates to a compound herbicide for preventing and controlling weeds in a rice field and a preparation method thereof.

Background

Herbicides are also known as herbicides. Chemical agent capable of killing weed or harmful plant without affecting normal growth of crop. Can be used for preventing and controlling farmland weeds or killing weeds or shrubs in non-agricultural lands. They can be classified into selective herbicides and biocidal herbicides according to their action characteristics. Selective herbicides are those which selectively kill certain species of plants while not harming other species of plants at the dosage and concentration range used.

Rice is a cereal crop of the genus Oryza, and the representative species is rice. The rice is native to China and India, and the rice is planted by precedents in Yangtze river basin of China seven thousand years ago. In the rice planting process, other weeds are easy to grow in the rice field, so that the weeds and the rice compete for nutrients, and the yield of the rice is reduced. For this purpose, weed control is carried out with the aid of herbicides. However, the existing herbicide for rice has not particularly ideal weeding effect and less weeding types, thereby reducing the economic benefit.

Disclosure of Invention

In view of the above problems, the present invention provides a compound herbicide for preventing and controlling weeds in rice fields and a preparation method thereof, which are used for solving the technical problems in the background art.

In order to achieve the purpose, the invention adopts the following technical scheme:

a compound herbicide for preventing and controlling weeds in rice fields, which comprises the following components in parts by weight: 8-12 parts of a mixed medicament, 3-4 parts of 1, 2, 4-triazolo [1, 5-a ] pyrimidine-2-sulfonamide, 2-5 parts of benzofuranone, 4-6 parts of a wetting agent, 5-7 parts of a binder, 3-7 parts of a surfactant, 10-15 parts of a coating agent, 80-100 parts of a filler and 30-40 parts of deionized water;

the mixed reagent is prepared by mixing penoxsulam, anilofos and ethoxysulfuron according to the weight ratio of 2-4: 30-50: 2-4.

Furthermore, the wetting agent is one or a combination of two of alkyl naphthalene sulfonate-anion wetting agent and sodium dodecyl sulfate.

Wherein, make the surface tension of penoxsulam derivative and other mixed medicaments, and then be convenient for penoxsulam derivative and other mixed medicaments and mixing liquid misce bene to and improve the drug effect.

Furthermore, the adhesive is selected from one or a mixture of two of carboxymethyl cellulose and glucose.

The adhesive is added, so that the interaction force of particles among the composite herbicide is moderate, the granulation rate is improved, the time for storing the composite herbicide is prolonged, and the composite herbicide is prevented from collapsing in the storage period.

Furthermore, the coating agent is one or a mixture of paraffin and resin.

The composite herbicide has the advantages that the coating agent is added, so that a semi-permeable or insoluble film is formed on the surface layer of the composite herbicide particles, the composite herbicide has the characteristic of slowly releasing nutrients, the fertilizer effect and the pesticide effect of the composite herbicide are prolonged, and the granulation rate of the composite herbicide is further improved.

Furthermore, the surfactant is one or a mixture of two of dilauryl dimethyl ammonium chloride and dicocoyl dimethyl ammonium chloride.

The solubilizing effect of the compound herbicide is improved by adding the surfactant, so that the compound herbicide is easily dissolved in a formed micelle, and the penetrating performance of the herbicide into plant cells is improved.

Furthermore, the preparation process of the filler comprises the following steps:

a. drying and grinding 20-30 parts by weight of ammonium sulfate, 10-20 parts by weight of monopotassium phosphate, 10-20 parts by weight of sodium chloride and 10-15 parts by weight of water-soluble starch, sieving by 50-100 meshes, and uniformly mixing the sieved ammonium sulfate, monopotassium phosphate, sodium chloride and water-soluble starch;

b. and (b) uniformly mixing 5-10 parts of disintegrating agent, 8-12 parts of dispersing agent and the mixture obtained in the step (a) to obtain the filler.

Wherein, through using nitrogenous ammonium sulfate, use the monopotassium phosphate of phosphorus and potassium, use the sodium chloride that contains sodium, make the filler have certain fertilizer efficiency, thereby make this compound herbicide granule have the efficiency of providing the nutritive element to the rice, provide fertilizer efficiency promptly, simultaneously through adding water-soluble starch, make the ammonium sulfate of different ratios, monopotassium phosphate and sodium chloride are better as the stability of medicine fertilizer granule, difficult moisture absorption, be convenient for store, and if when dissolving this compound herbicide in aqueous, it is good to make this compound herbicide stability in aqueous more easily, improve the drug effect.

Furthermore, the disintegrating agent is selected from one or a mixture of two of sodium carboxymethyl starch and croscarmellose sodium.

The composite herbicide granules are easy to disintegrate in soil by adding the disintegrant, so that the granules can effectively act on plants.

Furthermore, the dispersant is one or two of naphthalene sulfonate formaldehyde condensate and methyl naphthalene sulfonate formaldehyde condensate.

Wherein, by adding the dispersant, when the compound herbicide meets water, the active ingredients in the compound herbicide can easily enter water, so that the active ingredients can enter soil or plants along with the water.

A preparation method of a compound herbicide for preventing and controlling weeds in rice fields comprises the following steps:

s1: adding penoxsulam and 1, 2, 4-triazolo [1, 5-a ] pyrimidine-2-sulfonamide into 20-30 parts of diethyl ether and 60-80 parts of ethyl formate, stirring for 3-4 h at 50-60 ℃, then slowly dropwise adding 3-5 parts of thionyl chloride, stirring for 10-20min at room temperature, pouring the reaction liquid into ice water, carrying out ice bath for 5-8 min, heating to room temperature, extracting with diethyl ether for three times, combining organic phases, adjusting to be neutral by using weak acid, spin-drying and drying to obtain the penoxsulam derivative;

s2: carrying out air flow crushing on the penoxsulam derivative, the benzofuranone, the anilofos and the ethoxysulfuron obtained in the step S1, and uniformly mixing to obtain a mixed medicine;

s3: slowly dripping the surfactant into deionized water at room temperature within 10-20min, and stirring at the speed of 500-;

s4: uniformly mixing the mixed medicine obtained in the step S2 with a wetting agent, a coating agent and a filler, kneading the mixture with the mixed liquid obtained in the step S3 in a kneading machine at room temperature for 1-2h, and then feeding the kneaded mixture into a granulator for granulation to obtain preliminary compound herbicide granules;

s5: drying the preliminary compound herbicide granules obtained in the step S4 at 50-60 ℃ for 20-30min to obtain compound herbicide granules;

s6: and (4) carrying out moisture detection on the compound herbicide granules obtained in the step (S5), and returning to the step (S5) to carry out drying again if the moisture content is more than 3%.

The penoxsulam with the 1, 2, 4-triazolo [1, 5-a ] pyrimidine-2-sulfonamide group is synthesized by further modifying and grafting the benzene ring of the penoxsulam, so that the penoxsulam has higher activity on drug-resistant plants and the drug property of the penoxsulam derivative is improved, and the penoxsulam with the 1, 2, 4-triazolo [1, 5-a ] pyrimidine-2-sulfonamide group has two electrical parts which interact with ALS, so that the binding capacity of the penoxsulam derivative and the ALS is improved, the drug effect of the penoxsulam on the ALS is improved, and the herbicidal effect is improved.

By adopting the technical scheme, the invention has the beneficial effects that:

1. through further modification and grafting of a benzene ring of penoxsulam, penoxsulam with a 1, 2, 4-triazolo [1, 5-a ] pyrimidine-2-sulfonamide group is synthesized, so that penoxsulam has higher activity on drug-resistant plants and the drug property of the penoxsulam derivative is improved, and penoxsulam with the 1, 2, 4-triazolo [1, 5-a ] pyrimidine-2-sulfonamide group has two electric parts which interact with ALS, so that the binding capacity of the penoxsulam derivative and the ALS is improved, the drug effect of the penoxsulam on the ALS is improved, and the herbicidal effect is improved.

2. By adding the benzofuranone, the ethoxysulfuron and the anilofos into the penoxsulam derivative, the formed compound herbicide not only improves the drug property of the penoxsulam derivative, but also further improves the drug effects on the anilofos and the cyperus plants on the original basis, so that the drug effect of the herbicide is increased, the weeding range of the compound herbicide is improved, the compound herbicide can have a good killing effect on annual gramineous, broadleaf and cyperus weeds in a paddy field, and the economic benefit of the compound herbicide is improved.

3. Through the use of the surfactant and the filler, the surfactant improves the penetrating performance of the compound herbicide, so that the pesticide effect is improved, and meanwhile, a plurality of nutrient elements in the filler can provide pesticide-fertilizer support for rice, so that the function of the compound herbicide is further improved. And the herbicide prepared by the invention can be directly sown in the rice field, and compared with the traditional spray application method, the herbicide prepared by the invention is more time-saving, labor-saving and labor-saving when being applied.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention.