A synergistic auxiliary agent composition and its application

Abstract

The invention relates to the technical field of agricultural herbicides, and in particular to a synergistic adjuvant composition and an application thereof. The synergistic adjuvant composition comprises the following components and their weight percentages: 15-45% of an alkyl aryl sulfonate hyperbranched surfactant (AAS-HBP); 6-15% of an alkyl sarcosinate; 3-8% of a thickener; 0.1-1% of a defoamer; and 100% of a carrier. The synergistic adjuvant composition can effectively promote the entry of a herbicide safener into crops, that is, promote the absorption of the herbicide safener by the crops, which is very beneficial for increasing the detoxification effect of the safener on the herbicide, improving the tolerance of the crops to the herbicide, reducing the potential herbicide injury risk of the crops, and the like.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural herbicides, and in particular to a synergistic adjuvant composition and application thereof. Background Art

[0002] Agropyron is the most stubborn weed in wheat fields. It is closely related to wheat and most herbicides are ineffective against it. Mesosulfuron-butyl is a relatively effective herbicide for controlling Agropyron, but it will inevitably cause damage to wheat. Therefore, pyraclostrobin is often used in combination with herbicides such as mesosulfuron-butyl to reduce the toxic effects of herbicides on crops and improve the selectivity of herbicides.

[0003] After being absorbed by wheat, pyraclostrobin mainly inhibits acetolactate dehydrogenase in the plant, interferes with the amino acid metabolic pathway in the plant, and regulates the activity of antioxidant enzymes in the wheat, thereby inhibiting the sensitivity of wheat to methyl disulfuron and enhancing the wheat's tolerance to methyl disulfuron.

[0004] In terms of application technology, pyraclostrobin can be applied by foliar spraying, soil application and the like. Foliar spraying is a fast and effective application method that can directly act on the leaves of wheat, thereby quickly exerting a weed control effect. For example, CN113180040A discloses a combination of penoxsulam and a safener pyraclostrobin to alleviate its phytotoxicity to wheat and its application. The safener has the effect of significantly alleviating the phytotoxicity of penoxsulam to wheat, and does not affect the control effect of penoxsulam on weeds in wheat fields. CN103749443A A method for improving the safety of methyl disulfone, specifically adding a herbicide safener to the processing of methyl disulfone formulations, and spraying them together in the field can improve the safety of methyl disulfone to crops and reduce the occurrence of phytotoxicity.

[0005] There is also a method in the prior art to treat wheat seeds with pyraclostrobin in the form of seed coating, which can reduce the herbicide damage to wheat when spraying herbicides in the next year. For example, WO2018041762 discloses a method for reducing crop damage, specifically treating the seeds of crops with a safener before sowing, and then applying herbicides after germination, so as to achieve the purpose of reducing the herbicide damage to crops. CN108477155A discloses a method for improving the control effect of herbicides on wheat field weeds, which includes first treating wheat seeds with pyraclostrobin, and then applying herbicides for control, improving the control effect of herbicides on weeds and the safety of herbicides on wheat.

[0006] However, as a safener, pyraclostrobin needs to enter the body of the crop to exert its detoxification effect on the herbicide. Most of the known literature only focuses on the use period and method of the safener, and does not conduct in-depth research on the plant surface penetration performance of the safener. Summary of the invention

[0007] The purpose of the present application is to provide a synergistic adjuvant composition and its application, which can effectively promote the entry of herbicide safener into plants and improve the plant surface penetration performance of the herbicide safener. On the one hand, it can increase the safety of plants to herbicides, and on the other hand, it can effectively reduce the application amount of the herbicide safener while ensuring the detoxification effect.

[0008] One aspect of the present invention relates to a builder composition, wherein the components of the builder composition and their weight percentages are:

[0009] Alkyl aryl sulfonate hyperbranched surfactant (AAS-HBP), 15-45%

[0010] Alkyl sarcosinate, 6-15%

[0011] Thickener, 3-8%

[0012] Defoamer, 0.1-1%

[0013] Carrier, make up 100%.

[0014] The AAS-HBP has a structural formula as shown in the following formula (I):

[0015]

[0016] Formula (I).

[0017] AAS-HBP is an alkyl aryl sulfonate hyperbranched surfactant with excellent performance, and its preparation method is known to be described in: Wang Xuechuan, Li Xinmiao, Qiang Taotao. Synthesis and characterization of alkyl aryl sulfonate hyperbranched surfactant [J]. Printing and Dyeing Auxiliary Agents, 2013, 30 (06): 12-14, the entire content of which is incorporated into this application by reference.

[0018] Preferably, the components and their weight percentages in the synergistic aid composition are:

[0019] Alkyl aryl sulfonate hyperbranched surfactant, 20-30%

[0020] Alkyl sarcosinate, 8-12%

[0021] Thickener, 4-6%

[0022] Defoamer, 0.5-1%

[0023] Carrier, make up 100%.

[0024] In one embodiment of the present invention, the amount of the alkyl aryl sulfonate hyperbranched surfactant AAS-HBP in the builder composition is preferably 20%, 21%, 22%, 23%, 24%, 25%, 26%, 27%, 28%, 29%, 30%. A more preferred amount range is 24-26%, such as 24%, 25%, 26%.

[0025] In one embodiment of the present invention, the alkyl sarcosinate is preferably sodium lauroyl sarcosinate.

[0026] In one embodiment of the present invention, the amount of alkyl sarcosinate such as sodium lauroyl sarcosinate in the synergist composition is preferably 8%, 9%, 10%, 11%, 12%. The more preferred amount range is 9-11%, such as 9%, 10%, 11%.

[0027] In one embodiment of the present invention, the thickener is selected from one or more of gum arabic, magnesium aluminum silicate, sodium carboxymethyl cellulose, and sodium alginate, preferably sodium carboxymethyl cellulose or sodium alginate.

[0028] In one embodiment of the present invention, the amount of the thickener such as sodium carboxymethyl cellulose or sodium alginate in the synergist composition is preferably 4%, 5%, or 6%.

[0029] In one embodiment of the present invention, the defoaming agent is selected from one or more of butyl phosphate, isobutyl phosphate and silicone, preferably silicone.

[0030] In one embodiment of the present invention, the amount of the defoaming agent such as silicone in the synergistic aid composition is preferably 0.5%, 0.6%, 0.7%, 0.8%, 0.9%, or 1%.

[0031] In one embodiment of the present invention, the carrier is selected from one or more of water, castor oil, mineral oil, rapeseed oil, and methylated soybean oil, preferably water, mineral oil, and methylated soybean oil.

[0032] The present invention provides the use of any one of the synergistic adjuvant compositions in promoting the absorption of herbicide safeners by crops. The use includes mixing the synergistic adjuvant composition with the herbicide safener or a substance containing the herbicide safener before or before the herbicide safener is applied to the crops; and applying it to the crops. The mixing method may be tank mixing during field application, or the synergistic adjuvant composition may be mixed with the herbicide safener to prepare an agriculturally usable formulation, and then applied. In the preparation of the formulation, other agricultural adjuvants known in the art may be added if necessary.

[0033] The synergistic adjuvant composition of the present invention can effectively promote the herbicide safener to enter the body of crops, that is, promote the absorption of the herbicide safener by crops, which is very beneficial to increase the detoxification effect of the safener on the herbicide, improve the tolerance of crops to the herbicide, and reduce the potential risk of herbicide damage to crops. The reason for this may be that the combination of the surfactant component AAS-HBP and sodium lauroyl sarcosinate effectively promotes the transfer of the herbicide safener pyraclostrobin into the body of crops, and the two work together to produce a synergistic effect. Among them, the herbicide safener is preferably pyraclostrobin; the crop is preferably wheat; the herbicide is a sulfonylurea herbicide, preferably mesosulfuron.

[0034] In one embodiment, the present invention provides a composite comprising a herbicide safener and any one of the adjuvant compositions, preferably, the mass ratio of the herbicide safener to the adjuvant composition is 3:17.

[0035] In some embodiments, the present invention provides any of the following uses of the complex:

[0036] (1) Detoxification of herbicides;

[0037] (2) Improve crop tolerance to herbicides;

[0038] (3) Reduce herbicide damage to crops.

[0039] A method for promoting the absorption of a herbicide safener by crops, the method comprising mixing any one of the synergistic adjuvant compositions with the herbicide safener or a substance containing the herbicide safener when or before the herbicide safener is applied to the crops; and applying the synergistic adjuvant composition to the crops.

[0040] In the above method or application of the present invention, the herbicide safener is preferably mefenpyr-butyl; the crop is preferably wheat; and the herbicide is a sulfonylurea herbicide, preferably mesosulfuron-butyl.

[0041] Beneficial effects:

[0042] The synergistic adjuvant composition of the present invention can effectively promote the herbicide safener pyraclostrobin to enter the body of crops and give full play to the detoxification effect of the safener, which is very beneficial for increasing the detoxification effect of the safener on the herbicide, improving the tolerance of crops to the herbicide, and reducing the potential risk of herbicide damage to crops.

[0043] In the synergistic adjuvant composition of the present invention, the surfactant component AAS-HBP and sodium lauroyl sarcosinate are organically combined, which effectively promotes the transfer of mefenpyr into the body of crops, and the two produce a synergistic effect.

[0044] In addition, since the use of the synergistic adjuvant composition of the present invention can improve the utilization rate of the herbicide safener, the field dosage of the herbicide safener can be reduced in field application, thereby saving the cost of the drug. DETAILED DESCRIPTION

[0045] To make the purpose, technical scheme and advantages of the present invention clearer, the technical scheme in the present invention is described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative work premise belong to the scope of protection of the present invention. Reagents used in the present invention, unless otherwise specified, can all be purchased from the market.

[0046] The AAS-HBP used in the present invention is an alkyl aryl sulfonate hyperbranched surfactant with excellent performance. The specific preparation method is as follows: Wang Xuechuan, Li Xinmiao, Qiang Taotao. Synthesis and characterization of alkyl aryl sulfonate hyperbranched surfactants [J]. Printing and Dyeing Auxiliary Agents, 2013, 30 (06): 12-14, the entire content of which is incorporated into this application as a reference.

[0047] Example 1

[0048] The synergistic adjuvant composition formula consists of:

[0049] AAS-HBP 25 g,

[0050] Sodium lauroyl sarcosinate (CAS: 137-16-6) 10 g,

[0051] Sodium carboxymethyl cellulose (CAS: 9004-32-4) 5 g,

[0052] Silicone (CAS: 63148-62-9) 0.6g,

[0053] Methylated soybean oil (CAS: 67784-80-9) Make up to 100 g.

[0054] The preparation method is as follows: adding various components in the formula amount into methyl esterified soybean oil and stirring evenly to obtain the product.

[0055] Example 2

[0056] The synergistic adjuvant composition formula consists of:

[0057] AAS-HBP 23 g,

[0058] Sodium lauroyl sarcosinate 12 g,

[0059] Gum Arabic 4 g,

[0060] Silicone 0.8g,

[0061] Castor oil makes up to 100 g.

[0062] The preparation method is the same as Example 1.

[0063] Example 3

[0064] The synergistic adjuvant composition formula consists of:

[0065] AAS-HBP 27 g,

[0066] Sodium lauroyl sarcosinate 8 g,

[0067] Sodium carboxymethyl cellulose 4 g,

[0068] Butyl phosphate 0.8 g,

[0069] Methylated soybean oil is added to make up to 100 g.

[0070] The preparation method is the same as Example 1.

[0071] Example 4

[0072] The synergistic adjuvant composition formula consists of:

[0073] AAS-HBP 26 g,

[0074] Sodium lauroyl sarcosinate 9 g,

[0075] Sodium alginate 4 g,

[0076] Silicone 0.8g,

[0077] Make up to 100 g of mineral oil.

[0078] The preparation method is the same as Example 1.

[0079] Comparative Example 1

[0080] The synergistic adjuvant composition formula consists of:

[0081] AAS-HBP 35 g,

[0082] Sodium carboxymethyl cellulose 5 g,

[0083] Silicone 0.6g,

[0084] Methylated soybean oil is added to make up to 100 g.

[0085] The preparation method is the same as Example 1.

[0086] Comparative Example 2

[0087] The synergistic adjuvant composition formula consists of:

[0088] Sodium lauroyl sarcosinate 35 g,

[0089] Sodium carboxymethyl cellulose 5 g,

[0090] Silicone 0.6g,

[0091] Methylated soybean oil is added to make up to 100 g.

[0092] The preparation method is the same as Example 1.

[0093] 2. Plant absorption test

[0094] Tested crops: wheat

[0095] Test agents and control agents: Examples 1-4; Comparative Examples 1-2; Herbicide safener: mefenpyr-butyl.

[0096] Test method:

[0097] 15 g of pyraclostrobin original drug was added to 85 g of the adjuvant composition described in Examples 1-4 and Comparative Examples 1-2, respectively, and stirred evenly to prepare compositions containing pyraclostrobin, and then the compositions were diluted 800 times with deionized water, stirred evenly, and set aside.

[0098] Wheat was sown in seedling trays. Healthy wheat seedlings with uniform growth were selected for the test. Each treatment agent was sprayed using a spray tower, with 3 trays of wheat seedlings per treatment. The spray volume of each treatment was consistent, and the dosage of pyraclostrobin was controlled to be 80 g ai / hm 2 After spraying, the seedling tray was placed in a ventilated place and the timing was started. After 8 hours, leaves from the same part of each treated seedling were collected according to the five-point sampling method, and the leaf surface was wiped with acetone three times to remove the agent on the leaf surface. The sampled leaves were extracted using the improved QuEChERS extraction method.

[0099] The specific steps are as follows: accurately weigh 3g of leaves with the surface agent removed, freeze and crush with liquid nitrogen, put them into a centrifuge tube, add 10ml of acetone, vortex evenly for 2 minutes, and let stand for 8 minutes; then, centrifuge at 2000 rpm for 5 minutes, take the supernatant, add it to a centrifuge tube containing anhydrous sodium sulfate and graphitized carbon black, vortex evenly for 30 seconds, centrifuge at 2000 rpm for 5 minutes, filter with a filter membrane, concentrate the supernatant, and make the volume to 5ml with acetone, detect the content of pyraclostrobin in the sample by high performance liquid chromatography, and calculate the content of pyraclostrobin in the leaves. Repeat 3 times for each treatment and take the average value. The results are shown in Table 1 below.

[0100] Table 1 Content of pyraclostrobin in leaves of each treatment

[0101] deal with Auxiliary composition Mefenpyr-butyl content (mg / kg) 1 Example 1 5.24 2 Example 2 4.85 3 Example 3 4.93 4 Example 4 5.19 5 Comparative Example 1 3.61 6 Comparative Example 2 3.08

[0102] The experimental results show that, compared with Comparative Examples 1-2, the synergistic adjuvant compositions of Examples 1-4 can significantly promote the absorption of mefenacet-butyl by plants, among which the absorption promoting effects of Examples 1 and 4 are particularly significant.

[0103] The present invention has been described through specific embodiments. Those skilled in the art can refer to the contents of the present invention and make appropriate changes to achieve corresponding other purposes. The relevant changes do not deviate from the contents of the present invention. All similar replacements and modifications are obvious to those skilled in the art and are considered to be included in the scope of the present invention.

Claims

1. A synergistic aid composition, characterized in that: The components of the synergistic aid composition and their weight percentages are: Alkyl aryl sulfonate hyperbranched surfactant AAS-HBP, 15-45% Sodium lauroyl sarcosinate, 6-15% Thickener, 3-8% Defoamer, 0.1-1% Carrier, make up 100%; The AAS-HBP has a structural formula as shown in the following formula (I): Formula (I).

2. The builder composition according to claim 1, characterized in that The thickener is selected from one or more of gum arabic, magnesium aluminum silicate, sodium carboxymethyl cellulose, and sodium alginate; and / or the defoaming agent is selected from one or more of butyl phosphate, isobutyl phosphate and silicone; And / or the carrier is selected from one or more of water, castor oil, mineral oil, rapeseed oil, and methylated soybean oil.

3. A composite, characterized in that The invention comprises a herbicide safener and the adjuvant composition according to any one of claims 1 to 2.

4. The composite according to claim 3, characterized in that The mass ratio of the herbicide safener to the adjuvant composition is 3:

17.

5. Use of the synergistic adjuvant composition according to any one of claims 1 to 2 in promoting the absorption of herbicide safeners by crops.

6. The use according to claim 5, characterized in that: The use comprises mixing the synergist composition with the herbicide safener or a substance containing the herbicide safener when or before the herbicide safener is applied to crops; and applying the synergist composition to crops.

7. The use according to claim 6, characterized in that: The herbicide safener includes mefenpyr-butyl, and / or the herbicide is a sulfonylurea herbicide; and / or the crop includes wheat.

8. Any of the following uses of the complex according to claim 3 or 4: (1) Detoxification of herbicides; (2) Improve crop tolerance to herbicides; (3) Reduce herbicide damage to crops.

9. A method for promoting the absorption of herbicide safener by crops, characterized in that: The method comprises mixing the synergistic adjuvant composition according to any one of claims 1 to 2 with the herbicide safener or a substance containing the herbicide safener before or when the herbicide safener is applied to crops; and applying the synergistic adjuvant composition to crops.

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