CN111631227A

CN111631227A - Weeding composition containing glufosinate-ammonium and potassium fulvate

Info

Publication number: CN111631227A
Application number: CN202010491047.8A
Authority: CN
Inventors: 郭晓刚; 汪顺生; 廖意凤
Original assignee: Anhui Xitian Biotechnology Co ltd
Current assignee: Anhui Xitian Biotechnology Co ltd
Priority date: 2020-06-02
Filing date: 2020-06-02
Publication date: 2020-09-08

Abstract

The invention provides a weeding composition containing glufosinate-ammonium and potassium fulvate, wherein the ratio of the glufosinate-ammonium to the potassium fulvate can be 100:1-10: 3; the potassium fulvate can be used for the herbicidal activity of glufosinate-ammonium.

Description

Weeding composition containing glufosinate-ammonium and potassium fulvate

Technical Field

The invention belongs to the field of pesticides, and particularly provides a weeding composition containing glufosinate-ammonium and potassium fulvate.

Background

The glufosinate belongs to phosphorus-containing amino acid herbicides and is a Glutamine Synthetase (GS) inhibitor, the glufosinate kills leaves firstly, and the inhibition of the activity of glutamine synthetase in plants causes the inhibition of glutamine synthesis, the disturbance of nitrogen metabolism and the accumulation of ammonium ions, thereby damaging plant cell membranes and preventing the plants from withering due to photosynthesis. The glufosinate is mainly registered in non-cultivated lands, papaya gardens, tea gardens, banana gardens, citrus orchards, vegetable fields and the like, and has good control effect on annual and perennial dicotyledonous and gramineous weeds, such as alopecurus, crab grass, barnyard grass, wild barley, lolium multiflorum, green bristlegrass, wild wheat, wild corn, duck buds, Trigonopsis quinata, fescue, goosegrass, horsetail grass, horseweed herb and the like. The glufosinate-ammonium belongs to a contact herbicide, weeding speed is high, symptoms generally appear in about 2-3d, the influence of temperature is small, the glufosinate-ammonium has excellent performance, but the price is high, and the price of a glufosinate-ammonium raw drug is about 10 times of that of glyphosate. And because of long-term use and continuous generation of resistance, the dosage is gradually increased, and the harm to the environment and food safety is larger.

The potassium fulvate has similar functions to chemically synthesized auxin, cell classifier, abscisic acid and other plant hormones in the agricultural use process, plays a comprehensive role in regulating the growth and development of plants, and belongs to a plant growth regulator. Research also shows that fulvic acid has a certain therapeutic effect on plant diseases: for example, CN108124905A discloses that fulvic acid aqueous solution can prevent gray mold. In addition, CN110432286A, CN110352984A and CN110352973A in the patent applications of agricultural biotechnology research institute in Hunan province disclose that fulvic acid and salts thereof can be used for preventing and controlling weeds in paddy fields and can improve the yield of rice; but the application mode is that the fertilizer is used together with organic fertilizer, and the prevention effect is poor when the fertilizer is applied under a lower dosage. The applicant found in previous studies that potassium fulvate has no substantial control effect on barnyard grass when used as a spray treatment of stem leaves.

In the face of the situation that the glufosinate-ammonium original drug is high in price and serious drug resistance of weeds is easily caused by long-term high-dose application, the applicant combines glufosinate-ammonium and potassium fulvate to obtain excellent technical effect. In the prior art, no related technical report of compounding glufosinate-ammonium and potassium fulvate exists.

Disclosure of Invention

The invention provides a weeding composition containing glufosinate-ammonium and potassium fulvate, which can obviously improve the control effect of glufosinate-ammonium on weeds, and the potassium fulvate has an obvious enhancement effect on the weeding effect of glufosinate-ammonium, so that the defects in the prior art are effectively overcome. The technical scheme provided by the invention is as follows:

a herbicidal composition comprising glufosinate and potassium fulvate. The ratio of the glufosinate-ammonium to the potassium fulvate can be 100:1-10: 3. More preferably, the ratio of the glufosinate-ammonium to the potassium fulvate can be 20:1-10: 1.5.

The dosage form of the weeding composition can be water agent, soluble powder and granules. The auxiliary materials can be wetting agents, dispersing agents, synergists, solvents, defoaming agent carriers, defoaming agents and the like. The concrete options are: organosilicon, Silwet618, glycerol, water, 2, 4-dinitrophenol sodium, tallow amine polyoxyethylene ether, calcium lignosulphonate, ammonium sulfate and soluble starch.

The dosage form of the herbicidal composition of the present invention preferably comprises the synergist sodium 2, 4-dinitrophenol.

The weight percentage of the glufosinate-ammonium and the fulvic acid potassium in the weeding composition accounts for 1-80% of the total weight of the preparation. Preferably 10-60%. More preferably 10-50%

The potassium fulvate is used for improving the herbicidal activity of glufosinate-ammonium.

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

the weeding composition provided by the invention has an excellent weeding effect, and the potassium fulvate can be used for improving the weeding activity of glufosinate-ammonium. Compared with a commercially available 10% glufosinate-ammonium aqueous solution, the formulation of the preparation 1-4 can improve the weed control by more than 10%. In addition, the 2, 4-dinitrophenol sodium also has a certain promotion effect on the improvement of the glufosinate-ammonium control effect.

Detailed Description

The following detailed description of specific embodiments of the present invention is provided in conjunction with examples, but it should be understood that the scope of the present invention is not limited to the specific embodiments.

Example 1: bioassay test

Test agents: 10% Glufosinate ammonium aqua and potassium fulvate are purchased from the market

The test method comprises the following steps: the test was carried out in a greenhouse. After the soil is sieved, 200g of soil is filled in each pot. Wetting and soaking the soil, sowing barnyard grass 30 grains in each pot, covering 1cm of dry soil, and culturing in a greenhouse after sowing. Barnyard grass was planted at the 2-leaf stage, 20 plants were kept per pot, and the drug was sprayed at the 4-leaf stage. A quantitative spray tower is adopted, the liquid spray amount is 500L/ha, and the spray pressure is 0.5 KPa. Three replicates were performed, with clear water as control. Wherein, the addition amount of the potassium fulvate in the 10 percent glufosinate-ammonium aqua is 0.1 percent, 0.5 percent, 1 percent, 1.5 percent and 3 percent.

The survey statistical method comprises the following steps: after 7 days of application, the fresh weight of the aerial parts was investigated and the growth inhibition rate was calculated. The growth inhibition rate is converted into a probability value, and the dosage is converted into a logarithm, and then virulence regression formulas of different treatments are worked out. The results 7 days after treatment were used to calculate the ED50 value. Comparison of the magnitude of the effect of each treatment on glufosinate activity is expressed in relative virulence index. When the relative toxicity index is larger than 1, the synergistic effect is shown, and when the relative toxicity index is l, the additive effect is shown; antagonism is indicated when the relative virulence index is < l.

Results and analysis

The activity of the glufosinate-ammonium to the barnyard grass can be obviously improved by adding 0.5-3% of potassium fulvate. After 7 days of the application, the ED50 value of the glufosinate-ammonium for the barnyard grass is 466.65g a.i./ha, and the ED50 value of the glufosinate-ammonium for the barnyard grass is reduced to 109.71-253.75g a.i./ha after 0.5-3% of potassium fulvate is added. In 5 addition amounts, the best inhibition effect is achieved by adding 1% of potassium fulvate. In the process that the addition amount is gradually increased from 0.1 to 1 percent, the activity of the composition is gradually enhanced along with the increase of the addition amount; in the process of gradually increasing the addition amount from 1 to 3 percent, the activity of the composition is reduced to a certain extent along with the increase of the addition amount. The specific mechanism of this is to be further investigated, and the inventors speculate that this is a process due to the balance between its osmotic effect on glufosinate-ammonium and its plant growth regulating activity.

TABLE 1 Effect of Potassium Fulvate on the inhibition of Echinochloa crusgalli activity by Glufosinate

Remarking: when the potassium fulvate is tested separately at 500ppm, the stem leaf spray has no activity on barnyard grass.

Example 2: pesticide formulation

Preparation 1: 10% glufosinate solution

10% of glufosinate-ammonium, 1% of potassium fulvate, 0.5% of organic silicon, Silwet 6186%, 2% of glycerol and water to make up 100%.

Preparation 2: 30% glufosinate solution

30% of glufosinate-ammonium, 1.5% of potassium fulvate, 1% of 2, 4-dinitrophenol sodium, 0.8% of organic silicon, 600# 3% of agricultural milk, Silwet 6189%, 3% of glycerol and the balance of water to 100%.

Preparation 3: 50% glufosinate soluble powder

50% of glufosinate-ammonium, 7.5% of potassium fulvate, 5% of tallow amine polyoxyethylene ether, 4% of calcium lignosulfonate, 3% of ammonium sulfate and the balance of soluble starch to 100%.

Preparation 4: 50% glufosinate soluble powder

50% of glufosinate-ammonium, 7.5% of potassium fulvate, 3% of 2, 4-dinitrophenol sodium, 5% of tallow amine polyoxyethylene ether, 4% of calcium lignosulphonate, 3% of ammonium sulfate and the balance of soluble starch to 100%.

Example 3 field control efficacy test

Test agents: 10% glufosinate-ammonium aqua is purchased from the market; and the agent of the invention in example 2.

Weed species: barnyard grass, large crabgrass, field foraging, and sporadic purslane and nightshade.

The test method comprises the following steps: the test is designed by adopting a random block test method, the area of a test cell is 20m2(5m x 4m), and when the weeds grow more than 4 leaves, the spraying treatment is carried out. Spraying the pesticide at night in a divided mode, wherein the spraying weather is clear, a back type sprayer and four groups of fan-shaped spray heads are adopted, and the spraying liquid amount is 450L/ha.

The survey statistical method comprises the following steps: and (5) investigating the fresh weight of the overground part of the weeds 14 days after the application of the herbicide, and calculating the total control effect of the weeds.

Results and analysis

The addition of potassium fulvate in the formulation can significantly improve the field control effect of glufosinate-ammonium on weeds. Compared with a commercially available 10% glufosinate-ammonium aqueous solution, the formulation of the preparation 1-4 can improve the weed control by more than 10%. In addition, the 2, 4-dinitrophenol sodium also has a certain promotion effect on the improvement of the glufosinate-ammonium control effect. The mechanism of action remains to be studied further.

TABLE 2 determination of field control efficacy

Treatment agent	Dosage g a.i./ha	The total control effect is 100%
			Preparation 1	750	94.28
Preparation 2	750	96.34
			Preparation 3	750	91.15
Preparation 4	750	97.50
			10% glufosinate solution	750	81.06
Clean water	-	-

The above description is only a preferred embodiment of the present invention, and it is obvious to those skilled in the art that modifications may be made without departing from the scope of the present invention, and such modifications are also within the scope of the present invention.

Claims

1. A herbicidal composition comprising glufosinate and potassium fulvate, comprising glufosinate and potassium fulvate.

2. A herbicidal composition according to claim 1, wherein the ratio of glufosinate to potassium fulvate is from 100:1 to 10: 3.

3. A herbicidal composition according to claim 2, wherein the ratio of glufosinate to potassium fulvate is from 20:1 to 10: 1.5.

4. The herbicidal composition as claimed in any one of claims 1 to 3, wherein the formulation of the herbicidal composition is selected from aqueous solution, soluble powder and granule.

5. A herbicidal composition according to any one of claims 4, characterized in that glufosinate and potassium fulvate are present in an amount of 1 to 80% by weight of the total formulation.

6. Use of potassium fulvate to increase herbicidal activity of glufosinate.