阅读说明：本技术 一种绿色低毒类合成高分子除草剂组合物 (Green low-toxicity synthetic polymer herbicide composition ) 是由 徐益峰 徐金娇 宁早霞 朱定云 吴兵 方润 于 2021-05-08 设计创作，主要内容包括：本发明所述的一种绿色低毒类合成高分子除草剂组合物,组合物包括丙炔氟草胺、乙羧氟草醚和草铵膦有效组分,所述丙炔氟草胺、乙羧氟草醚和草铵膦的质量百分数配比范围为2～10：1～6：60～75,所述组合中中还包括润湿分散剂、崩解剂、黏结剂和载体,按组分混合均匀后进行超微气流粉碎,得到超微细粉备用,然后采用高速混合阀造粒,50～80℃烘干,经筛分后得到水分散粒剂,其中混配比例7:4:70的组合物药效最佳,能够有效扩大了杂草防治图谱,提高了除草剂的杀草活性,同时显著降低了除草剂的用量,降低了杂草对单一除草药剂的抗性,延缓了杂草对单剂用药的抗性,并提高了对抗性杂草的防效,延长了药剂的使用寿命,降低了环境压力。(The green low-toxicity synthetic polymer herbicide composition comprises effective components of flumioxazin, fluoroglycofen-ethyl and glufosinate, wherein the mass percentage ratio of the flumioxazin to the fluoroglycofen-ethyl to the glufosinate is 2-10: 1-6: 60-75, the composition also comprises a wetting dispersant, a disintegrant, an adhesive and a carrier, the components are uniformly mixed and subjected to superfine airflow crushing to obtain superfine powder for later use, then a high-speed mixing valve is adopted for granulation, drying is carried out at 50-80 ℃, and water dispersible granules are obtained after screening, wherein the composition with the mixing ratio of 7:4:70 has the best drug effect, can effectively expand a weed control map, improve the weed control activity of the herbicide, simultaneously remarkably reduce the dosage of the herbicide, reduce the resistance of weeds to a single herbicide, delay the resistance of weeds to the single herbicide, improve the control effect of resistant weeds, prolong the service life of the herbicide and reduce the environmental pressure.)

1. A green low-toxicity synthetic polymer herbicide composition is characterized by comprising at least one of components A, B and C, wherein A is one or more herbicides selected from compounds of formula H or salts thereof, wherein R1 is fluoroalkyl, R2 is chloro, R3 is CO2R4, R4 is C1-C4 alkyl, and R5 is NO2 radical; the composition comprises a wetting dispersant, a disintegrant, a binder and a carrier, wherein the composition is uniformly mixed according to the mass percentage, then superfine airflow crushing is carried out to obtain superfine powder for later use, the superfine powder is granulated by a high-speed mixing method, dried at 50-80 ℃, and screened to obtain the composition water dispersible granule.

2. The green synthetic polymer herbicide composition with low toxicity as claimed in claim 1, wherein the water dispersible granule has an ammonia ion content of at least 6.2% and a pH value of 5.0-8.0.

3. The green synthetic polymer herbicide composition with low toxicity as claimed in claim 1, wherein the wetting dispersant is fatty alcohol sulfate, the wetting dispersant has a mass fraction of 6%, the disintegrant is ammonium sulfate, the disintegrant has a mass fraction of 3%, the binder is polyethylene glycol, the binder has a mass fraction of 2%, the carrier is kaolin, and kaolin is used to make up the composition dispersible granules to 100%, and the composition is uniformly stirred and mixed.

4. The green synthetic polymer herbicide composition with low toxicity as claimed in claim 1, wherein the deviation of the mass fraction of the glufosinate ammonium salt is 70 ± 2.5%.

5. The green synthetic polymer herbicide composition with low toxicity as claimed in claim 1, wherein the component A is fluoroglycofen-ethyl with a mass fraction deviation of 4 ± 0.4%, and the component B is flumioxazin salt with a mass fraction deviation of 7 ± 0.7%.

Technical Field

The invention belongs to the technical field of pesticides, and particularly relates to a green low-toxicity synthetic polymer herbicide composition.

Background

Pesticides are one of important agricultural production materials, and modern agriculture cannot be separated from pesticides. Weeds are easy to compete for moisture, nutrients, soil and space with crops due to vigorous vitality of the weeds, are hosts of crop diseases and insect pests, spread the diseases and insect pests, degrade the yield and quality of the crops, increase the harmfulness, and increase the labor for management and the production cost; with the acceleration of the urbanization process in China, a great amount of rural labor is transferred to cities, the rural high-quality labor is seriously insufficient, and compared with an insecticide and a bactericide, the herbicide is used for selectively preventing and removing weeds between crops and the weeds.

The glufosinate-ammonium belongs to a biocidal contact type herbicide, has good killing activity on most uncultivated land weeds, has the advantages of wide weed control spectrum, low toxicity, high activity, good partial conductivity, good environmental compatibility and the like, but has weak systemic property and quick action. Flumioxazin is a contact type selective herbicide, and after the surface layer of soil is treated by the flumioxazin, a medicament is absorbed by soil ions to form a treatment layer on the surface of the soil, and when weeds germinate, seedlings are withered by contacting the medicament treatment layer. When the stems and leaves are treated, the plant can be absorbed by the young teeth and leaves of the plant, the plant can be conducted in the plant body, the action on the leaf surfaces of sensitive weeds is quick, protoporphyrin accumulation is caused, the peroxidation of cell membrane lipid is enhanced, so that the cell membrane structure and the cell function of the sensitive weeds are irreversibly damaged, the plant is easy to degrade in the environment, the plant is safe for the succeeding crops, the plant is low in toxicity to people and livestock, the acute oral LD50 of a rat is more than 5000 mg/kg, the acute skin absorption LD50 is more than 2000 mg/kg, the plant has no stimulation on the skin, has medium stimulation on the rabbit eyes, and has no chronic toxicity; the fluoroglycofen-ethyl is a diphenyl ether herbicide, can greatly increase the permeability of glufosinate-ammonium, is quickly absorbed by weed stems and leaves, ammonium ions quickly accumulate in the stems and leaves to reach a threshold value and are conducted to roots, so that the ammonium ions at the roots of the weeds are poisoned and killed, the weeds are killed more quickly, and the weeds are weeding more thoroughly.

In the prior art, a large number of compounds with herbicidal activity have been discovered, and the compounds are sold and used as herbicides at present, and in order to ensure the herbicidal effect and broad-spectrum herbicidal performance of the herbicides, the used herbicides are high in toxicity, have great threat to the environment and crops, even cause toxic residues of foods and cause harm to the health of people.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides a green low-toxicity synthetic polymer herbicide composition.

In order to solve the problems, the technical scheme adopted by the invention is as follows:

a green low-toxicity synthetic polymer herbicide composition comprises at least one of components A, B and C, wherein A is one or more herbicides selected from compounds of formula H or salts thereof, wherein R1 is fluoroalkyl, R2 is chloro, R3 is CO2R4, R4 is C1-C4 alkyl, and R5 is NO2 radical; the composition comprises a wetting dispersant, a disintegrant, a binder and a carrier, wherein the composition is uniformly mixed according to the mass percentage, then superfine airflow crushing is carried out to obtain superfine powder for later use, the superfine powder is granulated by a high-speed mixing method, dried at 50-80 ℃, and screened to obtain the composition water dispersible granule.

Furthermore, the content of ammonia ions in the water dispersible granules is at least 6.2%, and the pH value is 5.0-8.0.

Further, the wetting dispersant is fatty alcohol sulfate salt, the mass fraction of the wetting dispersant is 6%, the disintegrant is ammonium sulfate, the mass fraction of the disintegrant is 3%, the adhesive is polyethylene glycol, the mass fraction of the adhesive is 2%, the carrier is kaolin, and the kaolin is used for uniformly stirring and mixing the composition dispersible granules to 100%.

Further, the deviation of the mass fraction of the glufosinate ammonium salt is 70 ± 2.5%.

Further, the component A is fluoroglycofen-ethyl, the deviation of the mass fraction of the fluoroglycofen-ethyl is 4 +/-0.4%, and the component B is flumioxazin salt, 7 +/-0.7%.

Compared with the prior art, the invention has the following implementation effects:

the green low-toxicity synthetic polymer herbicide composition mainly comprises the active ingredients of flumioxazin, fluoroglycofen-ethyl and glufosinate, and experiments show that the herbicide effect of the composition herbicide is optimal, the weed control spectrum can be effectively expanded, the weed control activity of the herbicide is improved, the dosage of the herbicide is obviously reduced, the resistance of weeds to a single herbicide is delayed, the control effect of resistant weeds is improved, the service life of the herbicide is prolonged, and the environmental pressure is reduced, wherein the mixing ratio of 7 to 4 to 70 percent.

Drawings

FIG. 1 is a table showing the results of field efficacy tests of 74% fluoroglycofen-ethyl-glufosinate-ammonium polymer herbicide composition water dispersible granules;

FIG. 2 is a table of the field efficacy test results of 77% flumioxazin-glufosinate polymeric herbicide composition water dispersible granules;

FIG. 3 is a table of field efficacy test results of the flumioxazin-fluoroglycofen-ethyl-glufosinate-ammonium polymeric herbicide composition water dispersible granules at a ratio of 7:4: 70.

Detailed Description

The present invention will be described with reference to specific examples.

The invention relates to a green low-toxicity synthetic polymer herbicide composition, which comprises at least one of components A, B and C, wherein A is one or more herbicides selected from compounds with a molecular formula H or salts thereof, R1 is fluoroalkyl, R2 is chloro, R3 is CO2R4, R4 is C1-C4 alkyl, and R5 site NO2 free radical; the composition comprises a wetting dispersant, a disintegrant, a binder and a carrier, wherein the composition is uniformly mixed according to the mass percentage, then superfine airflow crushing is carried out to obtain superfine powder for later use, the superfine powder is granulated by a high-speed mixing method, dried at 50-80 ℃, and screened to obtain the composition water dispersible granule. The content of ammonia ions in the water dispersible granules is at least 6.2%, and the pH value is 5.0-8.0. The wetting dispersant is fatty alcohol sulfate salt, the mass fraction of the wetting dispersant is 6%, the disintegrating agent is ammonium sulfate, the mass fraction of the disintegrating agent is 3%, the adhesive is polyethylene glycol, the mass fraction of the adhesive is 2%, the carrier is kaolin, and the kaolin is used for complementing the composition dispersible granules to 100%, and the composition dispersible granules are uniformly stirred and mixed. The deviation of the mass fraction of the glufosinate ammonium salt is 70 +/-2.5%. The component A is fluoroglycofen-ethyl, the mass fraction deviation of the fluoroglycofen-ethyl is 4 +/-0.4%, and the component B is flumioxazin salt, 7 +/-0.7%. The main effective components of the herbicide composition of component A, B or C are low-toxicity and easily-degradable fluoroglycofen-ethyl, flumioxazin salt or glufosinate salt combination, the toxicity is low, the harm to the environment is small, the weed control spectrum can be effectively expanded, the weed control activity of the herbicide is improved, the dosage of the herbicide is obviously reduced, the resistance of weeds to a single herbicide is delayed, the control effect of resistant weeds is improved, and the service life of the herbicide is prolonged.

The following shows the effect of the green low-toxicity synthetic polymer herbicide composition in preventing and killing non-cultivated land weeds by combining with a field efficacy test.

The non-cultivated land weeds are used as control objects, and the mixing proportion of the reagent to be tested is 4%: 70% of fluoroglycofen-ethyl and glufosinate-ammonium composition water dispersible granules are used as test agents, 200g/L of glufosinate-ethyl aqueous solution and 10% of glufosinate-ethyl emulsifiable oil are used as control agents, the water consumption per mu is 50 liters, a stem leaf spraying application method is adopted in the vigorous growth period of weeds, the test results are shown in a field test result table in fig. 1, the appropriate dosage of the fluoroglycofen-ethyl and glufosinate-ammonium water dispersible granules is recommended to be 666-1110 g/ha as an effective component, the preparation dosage is 80-100 g/mu, the plant number control effect after the application is 30 days is 93.82-96.19%, the fresh weight control effect after the application is 30 days is 93.83-97.01%, the plant number control effect after the application is 30 days is 93.67%, and the fresh weight control effect is 93.79%; the 10 percent fluoroglycofen-ethyl missible oil with 90 g/hectare of active ingredient amount has the plant number prevention effect of 93.32 percent and the fresh weight prevention effect of 92.89 percent after being applied for 30 days, has large difference in the whole comparative drug effect, and has the mixing proportion of 4:70 the flumioxazin-fluoroglycofen-glufosinate composition water dispersible granule improves weed control effect while reducing the dosage of the medicament, has obvious difference of drug effect, shows low toxicity in toxicity and has less harm to the environment.

As shown in fig. 2, in the case of non-cultivated land weeds serving as a control object, 77% flumioxazin-glufosinate water dispersible granules are used as a test agent, 200g/L of a glufosinate-ammonium aqueous solution and 50% of flumioxazin wettable powder are used as a control agent, the water consumption is 450L/hectare, and a stem-leaf spraying application method is adopted in the vigorous growth period of weeds, the test result is shown in a field test result table in fig. 1, the appropriate dosage of the 77% flumioxazin-glufosinate water dispersible granules is recommended to be 462.00-577.50 g of an effective component, the preparation dosage is 40.00-50.00 g/mu, the plant number after-application is 87.34-92.10% after 30 days, the fresh weight control effect after-application is 93.92-96.74%, the plant number after-application is 93.52% after-30 days of the 200g/L of the glufosinate aqueous solution with the effective component of 900 g/hectare, and the fresh weight control effect is 96.81%; the 50 percent flumioxazin wettable powder with 90 g/hectare of active ingredient amount has the plant number prevention effect of 15.34 percent and the fresh weight prevention effect of 17.80 percent after being applied for 30 days; compared with the prior art, the herbicide has the advantages that the difference of the whole comparative effect is large, the dosage of the herbicide is reduced by the compounded 77% flumioxazin and glufosinate-ammonium, the weed weeding and controlling effect is improved, the difference of the effect is obvious, the toxicity is low, and the harm to the environment is small.

As shown in figure 3, the non-cultivated land weeds are used as the control objects, and the mixing proportion of the reagent is 7%: 4%: 70% of flumioxazin-fluoroglycofen-ethyl glufosinate composition water dispersible granules are used as test agents, 200g/L of a glufosinate solution, 50% of flumioxazin wettable powder and 10% of flumioxazin emulsifiable concentrate are used as control agents, the water consumption is 600 liters/hectare, a stem leaf spraying application method is adopted in the vigorous growth period of weeds, the test results are shown in a field test result table in fig. 1, the appropriate dosage of the flumioxazin-fluoroglycofen-ethyl glufosinate water dispersible granules is recommended to be 369.00.00-642.50 g/hectare as effective components, the preparation dosage is 30.00-50.00 g/mu, the plant number control effect is 88.30-93.20% 30 days after application, the fresh weight control effect is 93.92-97.35% 30 days after application, the plant number control effect is 93.52 days after 200g/L of the glufosinate solution as the effective component is 900 g/ha, and the fresh weight control effect is 96.81%; the 50 percent flumioxazin wettable powder with 90 g/hectare of active ingredient amount has the plant number prevention effect of 15.34 percent and the fresh weight prevention effect of 17.80 percent after being applied for 30 days; the 10 percent fluoroglycofen-ethyl missible oil with 90 g/hectare of active ingredient amount has the plant number prevention effect of 93.32 percent and the fresh weight prevention effect of 92.89 percent after being applied for 30 days, has great difference in the whole comparative drug effect, and has the mixing proportion of 7:4:70 the flumioxazin-fluoroglycofen-glufosinate composition water dispersible granule improves weed control effect while reducing the dosage of the medicament, has obvious difference of drug effect, shows low toxicity in toxicity and has less harm to the environment.

In conclusion, the water dispersible granule of the mixed composition herbicide comprises at least one of components A, B and C, wherein A is one or more herbicides selected from compounds with a molecular formula H or salts thereof, R1 is fluoroalkyl, R2 is chloro, R3 is CO2R4, R4 is C1-C4 alkyl, and R5 is NO2 free radical; the B is one or more herbicides selected from compounds of a formula I or salts thereof, wherein R6 is methyl, and C is glufosinate ammonium, so that the toxicity is low, the harm to the environment is small, the weed control spectrum can be effectively expanded, the weed control activity of the herbicide is improved, the dosage of the herbicide is obviously reduced, the resistance of weeds to a single herbicide is reduced, the resistance of weeds to the single herbicide is delayed, the control effect of resistant weeds is improved, and the service life of the herbicide is prolonged.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.