CN108782597B

CN108782597B - Suspending agent containing glyphosate and flumioxazin

Info

Publication number: CN108782597B
Application number: CN201710282835.4A
Authority: CN
Inventors: 梁灵; 罗小娟; 左元明
Original assignee: Sichuan Lier Crop Science Co Ltd
Current assignee: Sichuan Lier Crop Science Co Ltd
Priority date: 2017-04-26
Filing date: 2017-04-26
Publication date: 2021-08-06
Anticipated expiration: 2037-04-26
Also published as: CN108782597A

Abstract

The invention relates to a suspending agent containing glyphosate ethylene diamine salt and flumioxazin, which has reasonable components, good stability and obvious synergy and is used for preventing and treating gramineous weeds and broad-leaved weeds in cotton fields.

Description

Suspending agent containing glyphosate and flumioxazin

The technical field is as follows:

the invention belongs to the field of pesticide preparations, and particularly relates to a suspending agent containing glyphosate and flumioxazin, which is used for preventing and removing gramineous weeds and broadleaf weeds in a cotton field.

Technical background:

flumioxazin is an N-phenylphthalimide herbicide produced and developed by Sumitomo chemical industries, Japan. Can inhibit protoporphyrinogen oxidase, cause photosensitization and peroxidation of cell membrane lipid, and cause irreversible damage to cell membrane tenderness and mechanism, and in field, stem and leaf of sensitive weed after stem and leaf treatment die after sunlight irradiation, and bud of sensitive weed after soil treatment die after short-time sunlight irradiation.

The glyphosate is a systemic biocidal herbicide which is conventionally used in agriculture, and the application range of the glyphosate comprises orchards, uncultivated areas and the like. Can be used for preventing and treating monocotyledonous, dicotyledonous, annual or perennial weeds.

The suspending agent is prepared by using water as a medium and grinding the water-insoluble or slightly water-soluble solid raw drug by sand grinding with the help of certain auxiliary agents to uniformly disperse the water-insoluble or slightly water-soluble solid raw drug in the water to form a liquid-solid system which is fine in particles, highly suspended and stable in flow. Has the characteristics of small particle size, good dispersibility, high suspension rate, high biological activity, rain wash resistance and the like, and is an important direction for the development of pesticide formulations. In the composition of the preparation, the suspending agent mainly comprises pesticide raw materials, a wetting agent, a dispersing agent, a thickening agent, an antifreezing agent, a pH regulator, a defoaming agent, water and the like. The dispersing medium is water, so that the suspending agent has the characteristics of low cost, safe production, storage and use and the like, can be mixed with water in any proportion, is not influenced by the water quality and the water temperature, and is convenient to use. Compared with pesticide formulations using organic solvents as media, the pesticide formulation has the advantages of small environmental impact, light phytotoxicity and the like.

In the prior art, there are reports (CN1317932A) about the use of a composition of glufosinate ammonium salt and flumioxazin for controlling weeds in soybean fields, and the composition can be prepared into wettable powder, water dispersible granules and the like. However, in actual use, the preparation of the preparation requires the combined action of the active ingredients and the auxiliary agents to obtain a good preparation. After long-time experiments, the team discovers that the suspending agent containing glyphosate and flumioxazin with the best effect is obtained by optimizing under different proportions by using the auxiliary agents known in the prior art, and further completes the invention.

The invention content is as follows:

the invention aims to provide the suspending agent containing the glyphosate and the flumioxazin, which has the advantages of reasonable optimization of an auxiliary agent and good control effect. The technical scheme adopted by the invention is as follows:

a suspending agent containing glyphosate and flumioxazin is prepared from the following components in percentage by weight:

the effective components are as follows: 1 to 50 percent of glyphosate and 0.1 to 30 percent of flumioxazin;

surfactant (b): 1 to 20 percent;

0.5 to 2 percent of defoaming agent;

thickening agent: 1 to 5 percent;

filling: adding to 100%;

wherein the surfactant is selected from: one or more of alkylphenol polyoxyethylene, fatty alcohol polyoxyethylene ether, alkyl glycoside, tallow amine polyoxyethylene ether, alkyl naphthalene formaldehyde condensate sulfonate, lignin and derivative sulfonate, alkylphenol polyoxyethylene ether sulfonate, polyoxyethylene polyoxypropylene ether block copolymer and alkylphenol polyoxyethylene phosphate; the defoaming agent is organic silicon; the thickener is selected from: one or more of xanthan gum, hydroxymethyl cellulose and magnesium aluminum silicate; the filler is water; the preferred ratio is 15:1 surfactant to thickener.

The glyphosate in the invention is glyphosate ethylene diamine salt.

The preparation method of the suspending agent comprises the following steps: mixing the surfactant, the defoaming agent, the thickening agent and the filler, uniformly mixing by high-speed shearing, then adding the raw medicines, and carrying out ball milling in a ball mill for 2-3 hours to ensure that the particle size is below 5 mu m, thus preparing the suspending agent.

The dosage form of the invention has the following advantages:

1. the stability is good, and all the auxiliary agents are reasonably mixed, so that the preparation formulation has better performance in the aspects of stability and the like;

2. the herbicide has good persistence, the dosage form of the invention can prolong the persistence period of the herbicide for preventing and controlling weeds, and reduce the use times and the total dosage of pesticides;

3. the wetting property is good, when the liquid medicine is contacted with the blades in a field test, the contact angle can be smaller than 90 degrees instantly, a flat spreading state is achieved, the wetting and spreading effect is improved, and the control effect is improved;

4. the composition has reasonable formulation components and obvious synergism, and indoor activity and field test determination results show that the composition has synergism.

The present invention is further illustrated by the following examples, wherein the percentages are by weight, but the present invention is not limited thereto. The percentages in all formulations in the following examples are by weight.

The specific implementation mode is as follows:

example 148% Glyphosate ethylene diamine salt flumioxazin suspension

40% of glyphosate ethylene diamine salt, 8% of flumioxazin, 6.5% of alkylphenol polyoxyethylene, 8.5% of alkyl glycoside, 1% of xanthan gum, 1% of organosilicon and 100% of water. The preparation method comprises the steps of mixing the surfactant, the defoaming agent, the thickening agent and water, uniformly mixing by high-speed shearing, then adding the glyphosate ethylene diamine and the flumioxazin, ball-milling for 3 hours in a ball mill, and obtaining the 48% glyphosate ethylene diamine salt-flumioxazin suspending agent with the measured particle size of less than 5 mu m.

Example 260% Glyphosate ethylene diamine salt flumioxazin suspension

30% of glyphosate ethylene diamine salt, 30% of flumioxazin, 7% of sodium lignosulfonate, 8% of alkyl glycoside, 1% of xanthan gum, 0.5% of organosilicon and water added to 100%. The preparation method is the same as example 1.

Example 320% Glyphosate ethylene diamine salt flumioxazin suspension

5% of glyphosate ethylene diamine salt, 15% of flumioxazin, 5% of alkyl naphthalene formaldehyde condensate sulfonate, 10% of alkyl glycoside, 1% of xanthan gum, 0.5% of organosilicon and water added to 100%. The preparation method is the same as example 1.

Example 420% Glyphosate ethylene diamine salt flumioxazin suspension

5% of glyphosate ethylene diamine salt, 15% of flumioxazin, 5% of alkyl naphthalene formaldehyde condensate sulfonate, 13% of alkyl glycoside, 1% of xanthan gum, 0.5% of organosilicon and water added to 100%. The preparation method is the same as example 1.

TABLE 1 Main technical indices of the suspending agent of the invention

Note: the suspension rate of example 4 was between 80 and 90, and the product was also acceptable.

Test of field drug effect

Reagent to be tested: the compounded herbicides of examples 1-4.

Control agents: 46% glyphosate isopropylamine salt aqueous solution (control agent 1) and 50% flumioxazin wettable powder (control agent 2).

And (3) controlling crops: cotton.

Control target: green bristlegrass herb, alopecurus, barnyard grass and moleplant seed.

The test method comprises the following steps: the test was carried out in a cotton field, each group treated 3 times repeatedly, the treatment area being about 20m²Accurately weighing various medicaments according to the area of a test cell, and carrying out spraying treatment before seedlings. The weed death status after 30 days of administration is counted, the herbicidal activity of various agents is compared, and in addition, the growth condition of the crops is observed within 40 days after the administration to investigate whether the agents have phytotoxicity on the crops, and the results are shown in Table 2.

TABLE 2 herbicidal effect of glyphosate ethylenediamine salt flumioxazin suspension after 30 days

The field test result shows that the preparation of the invention has no phytotoxicity by observing the influence of the preparation on cotton seedlings, and shows that the components of the invention are reasonable and the wetting and rain-wash resistant effects are good. Through observation of the dynamic contact angle between the liquid drop of the example and the plant leaf, the contact angle of the liquid medicine of the example 4 is only smaller than 90 degrees after contacting the plant leaf for about 6 seconds, and the first instant contact angle of the liquid medicine of the other examples contacting the plant leaf is obviously smaller than 90 degrees and even close to 0 degree, so that the liquid medicine is completely spread. Under the field condition, due to the influence of wind power and the inclination angle of the blades, the liquid medicine always rolls off in the early stage, and the retention and deposition of the liquid medicine on the surface of the plant are influenced. The difference of the liquid holdup directly causes the difference of the effective component amount of the medicament at the target part, thereby influencing the prevention and treatment effect. This is also shown in the control effect of table 2.

Finally, it is to be noted that: modifications and improvements will be apparent to those skilled in the art without departing from the spirit of the invention and, therefore, are intended to be within the scope of the invention as claimed.

Claims

1. The suspending agent containing glyphosate and flumioxazin is characterized by comprising the following components:

40% of glyphosate ethylene diamine salt, 8% of flumioxazin, 6.5% of alkylphenol polyoxyethylene, 8.5% of alkyl glycoside, 1% of xanthan gum, 1% of organosilicon and 100% of water, and the application of the suspending agent in preventing and killing gramineous weeds and broadleaf weeds in cotton fields.