阅读说明：本技术 一种植物源增效草铵膦水剂及其制备方法与应用 (Plant source synergistic glufosinate-ammonium aqua and preparation method and application thereof ) 是由 金岩 丁绍武 张鹏 刘梦铭 王金欢 于 2021-01-22 设计创作，主要内容包括：本发明提供一种植物源增效草铵膦水剂,主要包括以下质量百分含量的组分：草铵膦有效成分5～40％、肉桂醛3～20％、硫酸铵2～8％、甘油5～15％、月桂醇硫酸盐2～20％,水余量。按上述配比加入去离子水、草铵膦有效成分、肉桂醛、硫酸铵、甘油、月桂醇硫酸盐,搅拌20～30min即得。本发明采用的肉桂醛是一种天然绿色助剂,由肉桂树提取而得,安全性好,能提高植株对草铵膦的吸收,加快药效发挥；利用本发明加工出的草铵膦水剂具有高效、成本低、对环境和生物安全性高等特点,具有良好的应用前景。(The invention provides a plant source synergistic glufosinate-ammonium aqua which mainly comprises the following components in percentage by mass: 5-40% of glufosinate ammonium active ingredient, 3-20% of cinnamaldehyde, 2-8% of ammonium sulfate, 5-15% of glycerol, 2-20% of lauryl alcohol sulfate and the balance of water. Adding deionized water, glufosinate ammonium active ingredients, cinnamyl aldehyde, ammonium sulfate, glycerol and lauryl sulfate according to the proportion, and stirring for 20-30 min to obtain the finished product. The cinnamaldehyde adopted by the invention is a natural green auxiliary agent, is extracted from cinnamon, has good safety, can improve the absorption of plants to glufosinate-ammonium and quickens the drug effect; the glufosinate-ammonium aqua processed by the method has the characteristics of high efficiency, low cost, high safety to environment and biology and the like, and has good application prospect.)

1. A plant source synergistic glufosinate-ammonium aqua is characterized by mainly comprising the following components in percentage by mass: 5-40% of glufosinate ammonium active ingredient, 3-20% of cinnamaldehyde, 2-8% of ammonium sulfate, 5-15% of glycerol, 2-20% of lauryl alcohol sulfate and the balance of water.

2. The aqueous glufosinate solution according to claim 1, wherein the glufosinate comprises 10-30% of active ingredients, 5-15% of cinnamaldehyde, 3-6% of ammonium sulfate, 7-12% of glycerol, and 5-15% of lauryl alcohol sulfate.

3. The aqueous glufosinate solution according to claim 1, wherein the lauryl sulfate is any one of sodium lauryl sulfate, triethanol ammonium lauryl sulfate, and an amine lauryl sulfate.

4. The aqueous glufosinate solution of claim 3, wherein the lauryl sulfate salt is sodium lauryl sulfate.

5. Aqueous glufosinate according to claim 1, characterized in that the cinnamaldehyde is extracted from the natural plant cinnamon tree.

6. The method for preparing glufosinate-ammonium aqua according to any one of claims 1 to 5, characterized by adding deionized water, glufosinate-ammonium active ingredients, cinnamaldehyde, ammonium sulfate, glycerol and lauryl sulfate according to a ratio and stirring for 20-30 min to obtain the glufosinate-ammonium aqua.

7. Use of the aqueous glufosinate solution according to any one of claims 1 to 5 or the aqueous glufosinate solution obtained by the method according to claim 6 for controlling farmland weeds.

8. Use of the aqueous glufosinate solution according to any one of claims 1 to 5 or the aqueous glufosinate solution obtained by the method according to claim 6 for controlling horseweed herb and/or green bristlegrass.

9. The use of the aqueous glufosinate solution according to any one of claims 1 to 5 or the aqueous glufosinate solution obtained by the method according to claim 6, wherein the amount of the active ingredient of glufosinate is 450 to 550g/hm²And adding 550-650L of water per hectare for spraying treatment.

Technical Field

The invention belongs to the technical field of pesticide application, and particularly relates to a plant-source synergistic glufosinate-ammonium aqua and a preparation method and application thereof.

Background

Glufosinate-ammonium belongs to a phosphoric acid herbicide, is a glutamine synthesis inhibitor, is a non-selective contact-killing broad-spectrum biocidal herbicide with partial systemic action, ammonium metabolism in plants is trapped in disorder in a short time after application, and a cytotoxic agent ammonium ion is accumulated in the plants, so that the photosynthesis is seriously inhibited, and the aim of weeding is fulfilled. The glufosinate-ammonium has the characteristics of high activity, low toxicity, good environmental compatibility and the like.

Although glufosinate can be transported in plants both upwards in xylem with transpiration and towards underground parts in phloem, glufosinate has poor conduction and its efficacy is greatly affected by the environment, with the effect of humidity on glufosinate being the most significant. Therefore, a synergist is often added in the preparation process of glufosinate-ammonium to reduce the dosage of pesticides and improve the activity of herbicides. In addition, it is reported that only about 0.1% of pesticides exert their own actions during their application, and most of the pesticides run off into the surrounding environment such as water and soil, causing environmental hazards.

At present, the synergist of the common glufosinate-ammonium water aqua in the market is mainly fatty alcohol-polyoxyethylene ether sulfate, but the effect of the ingredient on glufosinate-ammonium is common when the ingredient is used alone. Because the compatibility of the compound with glufosinate-ammonium in an aqueous solution is poor, a large amount of polar solvents such as ethanol or methanol are often required to be added as cosolvent.

Chinese patent document CN107535519A (201710882014.4) discloses a glufosinate synergist and a glufosinate solution prepared therefrom, wherein the glufosinate synergist is prepared from the following components in percentage by weight: 5-20% of sodium pyrrolidone carboxylate, 5-20% of lauryl alcohol sulfate, 5-25% of glycerol, 5-10% of ammonium sulfate and the balance of water; the glufosinate-ammonium water agent is prepared from the following components in percentage by weight: 5-50% of glufosinate-ammonium active ingredient, 5-15% of glufosinate-ammonium synergist and the balance of water. The sodium pyrrolidone carboxylate is non-toxic, good in stability and better in hygroscopicity, and can effectively improve the viscosity of the glufosinate-ammonium preparation, so that the overall adhesive force of the preparation is improved, and the drug effect is accelerated to play. The patent mainly utilizes the moisturizing effect of sodium pyrrolidone carboxylate, and the preparation method requires that glutamic acid is subjected to intramolecular dehydration to form PCA, and then the PCA-Na is formed by neutralization.

Compared with the traditional organic synergist, the plant source synergist is degradable, environment-friendly and harmless to the environment. The research on the plant source synergist is not successful, for example, sesame oil has good synergistic effect on pyrethroid insecticides; the sophora alopecuroide extract can improve the insecticidal effect of various organophosphorus pesticides. Although the botanical synergist does not have insecticidal, bactericidal and herbicidal activities, the insecticidal, bactericidal and herbicidal activities of the chemical pesticide can be greatly improved, so that the purpose of reducing the use amount of the chemical pesticide is achieved. At present, no relevant report about a glufosinate-ammonium plant-derived synergist exists.

Disclosure of Invention

The invention provides a plant source synergistic glufosinate-ammonium aqua and a preparation method and application thereof, aiming at solving the problems of low weeding speed and low weeding efficiency of glufosinate-ammonium in the prior art.

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

a plant source synergistic glufosinate-ammonium aqua mainly comprises the following components in percentage by mass: 5-40% of glufosinate ammonium active ingredient, 3-20% of cinnamaldehyde, 2-8% of ammonium sulfate, 5-15% of glycerol, 2-20% of lauryl alcohol sulfate and the balance of water.

Preferably, the composition comprises 10-30% of glufosinate ammonium active ingredient, 5-15% of cinnamaldehyde, 3-6% of ammonium sulfate, 7-12% of glycerol, 5-15% of lauryl alcohol sulfate and the balance of water.

The viscosity of the glufosinate-ammonium aqueous solution is 200-400 mPa.s.

Preferably, the lauryl alcohol sulfate is any one of sodium lauryl alcohol sulfate, triethanol ammonium lauryl alcohol sulfate and lauryl alcohol sulfate amine salt.

Sodium lauryl sulfate is more preferable.

Preferably, the cinnamaldehyde is extracted from a natural plant of cinnamomum cassia tree, which is more environmentally friendly. Further cinnamaldehyde is extracted from cinnamon leaves, cinnamon bark, cinnamon oil, etc. The extraction method of cinnamaldehyde is the existing mature technology.

The invention also provides a preparation method of the plant-derived synergistic glufosinate-ammonium aqua, which comprises the steps of adding deionized water, glufosinate-ammonium active ingredients, cinnamaldehyde, ammonium sulfate, glycerol and lauryl sulfate according to the proportion, and stirring for 20-30 min to obtain the plant-derived synergistic glufosinate-ammonium aqua.

The invention also provides application of the plant source synergistic glufosinate-ammonium aqua in prevention and control of farmland weeds.

Further preferably, the plant-derived synergistic glufosinate-ammonium aqua is applied to control of horseweed herb and/or green bristlegrass.

The invention also provides a use method of the plant source synergistic glufosinate-ammonium aqua, according to the active ingredients of glufosinate-ammonium

450～550g/hm²And adding 550-650L of water per hectare for spraying treatment.

One or more technical solutions provided by the embodiments of the present invention have at least the following technical effects:

the plant source synergistic glufosinate-ammonium aqua adopts cinnamaldehyde which is a natural green auxiliary agent and is extracted from cinnamon trees, so that the safety is good, the plant absorption of glufosinate-ammonium can be improved, and the drug effect can be accelerated. The cinnamaldehyde is generally only used for promoting the sterilization and insecticidal effects of a bactericide or an insecticide, and the inventor surprisingly discovers that the cinnamaldehyde can improve the weeding effect by being used together with ammonium sulfate and lauryl sulfate through a large number of experiments, so that the cinnamaldehyde is applied to the pesticide synergist for the first time. The horseweed herb and green bristlegrass herb treated by the glufosinate-ammonium aqua of the invention have poisoning symptoms in 2 days, and the fresh weight control efficiency in 7 days can respectively reach 74% and 85%.

The ammonium sulfate in the plant source synergistic glufosinate-ammonium aqua can reduce the hardness of water, and can change the pH difference between plant protoplasm in cells and between cells, so that herbicide molecules are easy to diffuse through plasma membranes, and the activity of the herbicide is improved; the lauryl sulfate can improve the wettability of the liquid medicine on plants, the glycerol can improve the moisturizing effect of the liquid medicine, and the lauryl sulfate is used as a surfactant, not only has the synergistic effect, but also can solubilize the cinnamaldehyde in water. The lauryl alcohol ether sulfate and the glycerol are used in a matched mode, so that the drying time of the liquid medicine on the plant leaves can be prolonged, the liquid medicine can be fully absorbed in a liquid form, and if the liquid medicine is volatilized and dried quickly, the glufosinate ammonium forms thick crystals which are not beneficial to being absorbed into the bodies of weeds, and the weeding effect is influenced.

The plant source synergist is green and safe, and the glufosinate-ammonium water aqua prepared by the plant source synergist has the advantages of high safety to environment and organisms, low cost, high weeding speed and thorough weeding.

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.

Example 1: 10% glufosinate solution

A plant source synergistic glufosinate-ammonium aqua comprises the following components in percentage by mass:

preparing 1000g of 10 percent glufosinate-ammonium aqua by mass percent: 645g of deionized water, 105 g of glufosinate-ammonium original drug (content 95%), 50g of cinnamaldehyde, 30 g of ammonium sulfate, 70g of glycerol and 100g of sodium lauryl sulfate are sequentially added into a 2000mL flask; stirring for 20-30 minutes to obtain the 10% plant source synergistic glufosinate-ammonium aqua.

Example 2: 20 percent of glufosinate-ammonium aqueous solution,

a plant source synergistic glufosinate-ammonium aqua comprises the following components in percentage by mass:

preparing 1000g of 20% glufosinate solution: in a 2000mL flask, 490g of deionized water, 210 g of glufosinate ammonium original drug (content 95%), 70g of cinnamaldehyde, 50g of ammonium sulfate, 80g of glycerol and 100g of sodium lauryl sulfate are sequentially added; stirring for 20-30 minutes to obtain the 20% plant source synergistic glufosinate-ammonium aqua.

Example 3: 30 percent of glufosinate-ammonium aqueous solution,

a plant source synergistic glufosinate-ammonium aqua comprises the following components in percentage by mass:

preparing 1000g of 30% glufosinate solution: 374g of deionized water, 316 g of glufosinate ammonium original drug (content is 95%), 80g of cinnamaldehyde, 50g of ammonium sulfate, 80g of glycerol and 100g of sodium lauryl sulfate are sequentially added into a 2000mL flask; stirring for 20-30 minutes to obtain the 30% plant source synergistic glufosinate-ammonium aqua.

Examples 4 to 7

According to the method of example 1, a glufosinate-ammonium aqua with the following weight components is prepared:

TABLE 1

Serial number	Glufosinate (%)	Cinnamic aldehyde (a)％)	Ammonium sulfate (%)	Glycerol (%)	Sodium lauryl sulfate (%)
						Example 4	20	15	6	12	5
Example 5	20	15	6	12	15
						Example 6	5	20	2	5	20
Example 7	40	3	8	15	2

Comparative example 1: 10% glufosinate-ammonium aqua containing no cinnamaldehyde

A plant source synergistic glufosinate-ammonium aqua comprises the following components in percentage by mass:

preparing 1000g of 10% glufosinate solution: in a 2000mL flask, 695g of deionized water, 105 g of glufosinate ammonium original drug (content 95%), 30 g of ammonium sulfate, 70g of glycerol and 100g of sodium lauryl sulfate are sequentially added; stirring for 20-30 minutes to obtain the 10% plant source synergistic glufosinate-ammonium aqua.

Comparative example 2: 20% glufosinate-ammonium aqua containing no cinnamaldehyde

A plant source synergistic glufosinate-ammonium aqua comprises the following components in percentage by mass:

preparing 1000g of 10% glufosinate solution: in a 2000mL flask, 560g of deionized water, 210 g of glufosinate ammonium original drug (content 95%), 50g of ammonium sulfate, 80g of glycerol and 100g of sodium lauryl sulfate are sequentially added; stirring for 20-30 minutes to obtain the 20% plant source synergistic glufosinate-ammonium aqua.

Comparative example 3: a commercially available glufosinate ammonium water agent (with the mass concentration of 20%) is adopted and purchased from Germany Bayer crop science GmbH with the trade name 'Baotoda'.

Comparative example 4:

a glufosinate aqueous solution, the same as example 2, except that acrolein was used instead of cinnamaldehyde.

Comparative example 5:

a glufosinate-ammonium water agent comprises the following components in percentage by mass:

and (3) field efficacy experiment:

reagent to be tested: examples 1 to 7 and comparative examples 1 to 5

Control target: herba erigerontis, herba Setariae viridis

The test method comprises the following steps: 4 pieces of 8m are selected²Grass with uniform grass phase, randomly arranged according to 500g/hm of glufosinate-ammonium effective component²And adding 600L of water into each hectare for spraying treatment, respectively carrying out pesticide effect observation after 2 days of treatment, and recording fresh weight control effect after 7 days.

TABLE 2 Observation of test results 2 days after application

As seen from the test results in Table 2, the weeds treated in the examples showed toxic symptoms in 2 days, while the comparative examples showed no response to erigeron breviscapus and slight toxic symptoms to Setaria viridis, indicating that the glufosinate-ammonium of the present invention has a good quick-acting property. The glufosinate-ammonium aqua can greatly improve the absorption and conduction of weeds to the herbicide, weeds die quickly, and the herbicide effect is remarkably accelerated compared with that of the marketed glufosinate-ammonium aqua.

The fresh weight control results are recorded after 7 days as shown in table 3:

table 3:

the data in table 3 show that the weeding effect of the glufosinate-ammonium aqueous solution is remarkably higher than that of the glufosinate-ammonium aqueous solution prepared by the conventional method. The weeding efficiency and speed of the glufosinate-ammonium aqua can be greatly improved by adding the cinnamaldehyde; and when the addition amount of the ammonium sulfate and the glycerol is within the formula range of the invention, the ammonium sulfate and the glycerol can exert better synergistic effect.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications and substitutions should be considered to fall within the scope of the claims.