A herbicidal composition containing propanil, mesotrione and clomazone

Abstract

The present invention relates to the field of herbicides, and specifically relates to a herbicidal composition containing propanil, mesotrione, and clomazone, which is used to solve the problems of large dosage and poor control effect when propanil, mesotrione, and clomazone are used alone; by reasonably compounding propanil, mesotrione, and clomazone, a herbicidal composition is prepared, and then the herbicidal composition is applied to weeds. After application, the herbicidal composition is absorbed by the weeds. The action mechanisms of propanil, mesotrione, and clomazone are different. After compounding, the weeds can be controlled simultaneously in three ways, making it difficult for the weeds to eliminate the effects of the three herbicides on their metabolic pathways at the same time, thereby delaying the generation of weed resistance and prolonging the action time of the herbicide. It can not only reduce the dosage of a single herbicide, but also improve the control effect on weeds, showing an obvious synergistic effect and expanding the weed control spectrum.

Description

Technical Field

[0001] The present invention relates to the field of herbicides, and particularly to a herbicidal composition containing propanil, mesotrione and clomazone. Background Art

[0002] Propanil belongs to amide-type highly selective contact herbicides, and its molecular structural formula is as follows:

[0003]

[0004] Propanil hardly conducts in plants and only acts at the part where the agent contacts. Its mechanism of action is multi-faceted. It not only destroys the photosynthesis of plants, but also inhibits respiration and oxidative phosphorylation, interferes with nucleic acid and protein synthesis, etc., thereby affecting the physiological functions of sensitive plants, accelerating water loss, gradually withering of leaves, and finally death.

[0005] Mesotrione belongs to benzoylcyclohexanedione herbicides, and its molecular structural formula is as follows:

[0006]

[0007] Mesotrione is an effective competitive inhibitor of the enzyme p-hydroxyphenylpyruvate dioxygenase (HPPD). The HPPD enzyme widely exists in various organisms and catalyzes the initial reaction of the biosynthesis of plastoquinone and tocopherol. When the HPPD enzyme is inhibited, tyrosine accumulates in the plant meristem and plastoquinone is exhausted, and the plant turns albino and gradually dies.

[0008] Clomazone belongs to organic heterocyclic selective pre-emergence herbicides, and its molecular structural formula is as follows:

[0009]

[0010] Clomazone can be absorbed through roots and young buds and conduct upward to various parts of the plant, thereby inhibiting the synthesis of isoprenoid compounds and hindering the biosynthesis of carotenoids and chlorophyll in sensitive plants. Although such plants can germinate and emerge from the soil, they have no pigments and die in a short time.

[0011] Although propanil, mesotrione and clomazone can control weeds when used alone, the dosage of the agent is large, the control cost is high, and after long-term use, weeds will develop resistance to propanil, mesotrione and clomazone, resulting in a significant decline in the herbicidal effect.

[0012] How to improve the large dosage and poor control effect when propanil, mesotrione and clomazone are used alone is the key to the present invention. Summary of the Invention

[0013] In order to overcome the above technical problems, the object of the present invention is to provide a weeding composition containing propanil, mesotrione and clomazone: by reasonably compounding propanil, mesotrione and clomazone, a weeding composition is prepared, which solves the problems of large dosage and poor control effect when propanil, mesotrione and clomazone are used alone.

[0014] The object of the present invention can be achieved by the following technical solutions:

[0015] A weeding composition containing propanil, mesotrione and clomazone, comprising 25-45% by mass of active ingredients, and the balance being auxiliary materials;

[0016] The active ingredients are a mixture of propanil, mesotrione and clomazone;

[0017] The mass ratio of propanil, mesotrione and clomazone is 10-50:1-10:10-30.

[0018] As a further scheme of the present invention: the mass ratio of propanil, mesotrione and clomazone is 30-50:10:0.5-20.

[0019] As a further scheme of the present invention: the mass ratio of propanil, mesotrione and clomazone is 50:10:20.

[0020] As a further scheme of the present invention: the auxiliary materials include wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose and diatomite.

[0021] As a further scheme of the present invention: the auxiliary materials further include emulsifier EC-1209, isophorone, DMF and solvent No. 150.

[0022] As a further scheme of the present invention: the auxiliary materials further include dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate and deionized water.

[0023] As a further scheme of the present invention: the pesticide dosage form of the weeding composition includes but is not limited to water dispersible granules, emulsifiable concentrates, water suspension concentrates, wettable powders, aqueous solutions, dispersible oil suspension concentrates, microemulsions.

[0024] As a further scheme of the present invention: the use of the weeding composition for controlling various annual and perennial weeds in paddy fields.

[0025] As a further scheme of the present invention: the weeds include barnyard grass, Monochoria vaginalis, Alisma plantago-aquatica, Cyperus serotinus, Alternanthera philoxeroides, Eleocharis yokoscensis, Ludwigia prostrata, Marsilea quadrifolia.

[0026] The beneficial effects of the present invention:

[0027] The herbicidal composition containing propanil, mesotrione and clomazone of the present invention is prepared by reasonably compounding propanil, mesotrione and clomazone to obtain the herbicidal composition. Then, the herbicidal composition is applied to weeds. After application, the herbicidal composition is absorbed by the weeds. Propanil in the herbicidal composition not only destroys the photosynthesis of weeds, but also inhibits the respiration and oxidative phosphorylation of weeds, interferes with nucleic acid and protein synthesis, etc., thereby affecting the physiological functions of weeds, accelerating water loss, gradually withering of leaves, and finally death. Mesotrione inhibits the HPPD enzyme in weeds, resulting in the accumulation of tyrosine and the exhaustion of plastoquinone in the plant meristem, and the weeds turn white and gradually die. Clomazone can inhibit the synthesis of isoprenoid compounds in weeds and hinder the biosynthesis of carotenoids and chlorophyll in sensitive plants. Although the weeds can germinate and emerge from the soil, they have no pigments and die in a short time. The action mechanisms of propanil, mesotrione and clomazone are different. After compounding, they can simultaneously control weeds in three ways, making it difficult for weeds to eliminate the effects of the three herbicides on their metabolic pathways at the same time, thereby delaying the generation of weed resistance and prolonging the action time of the herbicide. It can not only reduce the dosage of a single herbicide, but also improve the control effect on weeds, showing an obvious synergistic effect, expanding the herbicidal spectrum, and having good control effects on barnyard grass, Monochoria vaginalis, Alisma plantago-aquatica, Cyperus serotinus, Alternanthera philoxeroides, Eleocharis yokoscensis, Ludwigia prostrata, Marsilea quadrifolia. Specific embodiments

[0028] The following will combine the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0029] Example 1:

[0030] This example is a preparation method of a herbicidal composition containing propanil, mesotrione and clomazone, including the following steps:

[0031] Step 1: Weigh 25% of the active ingredient, 5% of the wetting agent NP-10, 2.2% of sodium dodecylbenzenesulfonate, 3.5% of sodium alginate, 1.2% of sodium carboxymethylcellulose according to the mass ratio, and make up to 100% with diatomite; among them, the mass ratio of propanil, mesotrione and clomazone in the active ingredient is 10:0.1:0.5;

[0032] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose, and diatomaceous earth into a mixer and mix evenly. Then, pulverize them with a jet mill, sieve through a 300-mesh sieve, and then perform kneading granulation with a rotary extrusion granulator to obtain a herbicidal composition in the form of water-dispersible granules.

[0033] Example 2:

[0034] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0035] Step 1: Weigh 35% of the active ingredients, 6.5% of the wetting agent NP-10, 3.8% of sodium dodecylbenzenesulfonate, 5.5% of sodium alginate, 1.5% of sodium carboxymethylcellulose according to the mass ratio, and make up to 100% with diatomaceous earth; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 10:0.1:10;

[0036] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose, and diatomaceous earth into a mixer and mix evenly. Then, pulverize them with a jet mill, sieve through a 300-mesh sieve, and then perform kneading granulation with a rotary extrusion granulator to obtain a herbicidal composition in the form of water-dispersible granules.

[0037] Example 3:

[0038] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0039] Step 1: Weigh 45% of the active ingredients, 8% of the wetting agent NP-10, 5.4% of sodium dodecylbenzenesulfonate, 7.5% of sodium alginate, 1.8% of sodium carboxymethylcellulose according to the mass ratio, and make up to 100% with diatomaceous earth; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 10:0.1:20;

[0040] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose, and diatomaceous earth into a mixer and mix evenly. Then, pulverize them with a jet mill, sieve through a 300-mesh sieve, and then perform kneading granulation with a rotary extrusion granulator to obtain a herbicidal composition in the form of water-dispersible granules.

[0041] Example 4:

[0042] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0043] Step 1: Weigh the active ingredients at a mass ratio of 25%, emulsifier EC-1209 at 8%, isophorone at 1.8%, DMF at 0.8%, and make up to 100% with solvent No. 150; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 10:5:0.5;

[0044] Step 2: First, add isophorone, DMF, the active ingredients, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes, it is completely dissolved until transparent. Then add emulsifier EC-1209, and finally add the remaining solvent No. 150, and stir for another 40 minutes to obtain an emulsifiable concentrate herbicidal composition.

[0045] Example 5:

[0046] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, including the following steps:

[0047] Step 1: Weigh the active ingredients at a mass ratio of 35%, emulsifier EC-1209 at 11%, isophorone at 2.5%, DMF at 1.5%, and make up to 100% with solvent No. 150; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 10:5:10;

[0048] Step 2: First, add isophorone, DMF, the active ingredients, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes, it is completely dissolved until transparent. Then add emulsifier EC-1209, and finally add the remaining solvent No. 150, and stir for another 40 minutes to obtain an emulsifiable concentrate herbicidal composition.

[0049] Example 6:

[0050] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, including the following steps:

[0051] Step 1: Weigh the active ingredients at a mass ratio of 45%, emulsifier EC-1209 at 13%, isophorone at 3.2%, DMF at 2.2%, and make up to 100% with solvent No. 150; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 10:5:20;

[0052] Step 2: First, add isophorone, DMF, the active ingredients, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes, it is completely dissolved until transparent. Then add emulsifier EC-1209, and finally add the remaining solvent No. 150, and stir for another 40 minutes to obtain an emulsifiable concentrate herbicidal composition.

[0053] Example 7:

[0054] This example is a preparation method of a herbicidal composition containing propanil, mesotrione and clomazone, which includes the following steps:

[0055] Step 1: Weigh 25% of the active ingredients, 4.2% of dispersant SD-208, 5.1% of ethylene glycol, 0.8% of xanthan gum, 0.2% of sodium benzoate according to the mass ratio, and make up to 100% with deionized water; among them, the mass ratio of propanil, mesotrione and clomazone in the active ingredients is 10:10:0.5;

[0056] Step 2: Mix the active ingredients, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate and deionized water evenly, and then ball-mill with a ball mill until the average particle size ≤ 5 μm to obtain a herbicidal composition in the form of a water suspension.

[0057] Example 8:

[0058] This example is a preparation method of a herbicidal composition containing propanil, mesotrione and clomazone, which includes the following steps:

[0059] Step 1: Weigh 35% of the active ingredients, 5.3% of dispersant SD-208, 5.7% of ethylene glycol, 1.0% of xanthan gum, 0.4% of sodium benzoate according to the mass ratio, and make up to 100% with deionized water; among them, the mass ratio of propanil, mesotrione and clomazone in the active ingredients is 10:10:10;

[0060] Step 2: Mix the active ingredients, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate and deionized water evenly, and then ball-mill with a ball mill until the average particle size ≤ 5 μm to obtain a herbicidal composition in the form of a water suspension.

[0061] Example 9:

[0062] This example is a preparation method of a herbicidal composition containing propanil, mesotrione and clomazone, which includes the following steps:

[0063] Step 1: Weigh 45% of the active ingredients, 6.5% of dispersant SD-208, 6.3% of ethylene glycol, 1.2% of xanthan gum, 0.5% of sodium benzoate according to the mass ratio, and make up to 100% with deionized water; among them, the mass ratio of propanil, mesotrione and clomazone in the active ingredients is 10:10:20;

[0064] Step 2: Mix the active ingredients, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate and deionized water evenly, and then ball-mill with a ball mill until the average particle size ≤ 5 μm to obtain a herbicidal composition in the form of a water suspension.

[0065] Example 10:

[0066] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, comprising the following steps:

[0067] Step 1: Weigh the active ingredients at a mass ratio of 25%, wetting agent NP-10 at 5%, sodium dodecylbenzenesulfonate at 2.2%, sodium alginate at 3.5%, sodium carboxymethylcellulose at 1.2%, and diatomaceous earth to make up to 100%; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:0.1:0.5;

[0068] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose, and diatomaceous earth into a mixer and mix evenly. Then, crush them with a jet mill, pass through a 300-mesh sieve, and then use a rotary extrusion granulator for kneading and granulating to obtain a herbicidal composition in the form of a water-dispersible granule.

[0069] Example 11:

[0070] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, comprising the following steps:

[0071] Step 1: Weigh the active ingredients at a mass ratio of 35%, wetting agent NP-10 at 6.5%, sodium dodecylbenzenesulfonate at 3.8%, sodium alginate at 5.5%, sodium carboxymethylcellulose at 1.5%, and diatomaceous earth to make up to 100%; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:0.1:10;

[0072] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose, and diatomaceous earth into a mixer and mix evenly. Then, crush them with a jet mill, pass through a 300-mesh sieve, and then use a rotary extrusion granulator for kneading and granulating to obtain a herbicidal composition in the form of a water-dispersible granule.

[0073] Example 12:

[0074] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, comprising the following steps:

[0075] Step 1: Weigh the active ingredients at a mass ratio of 45%, wetting agent NP-10 at 8%, sodium dodecylbenzenesulfonate at 5.4%, sodium alginate at 7.5%, sodium carboxymethylcellulose at 1.8%, and diatomaceous earth to make up to 100%; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:0.1:20;

[0076] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethyl cellulose, and diatomaceous earth into a mixer and mix evenly. Then, pulverize the mixture with an air jet mill, sieve it through a 300-mesh sieve, and then perform kneading granulation using a rotary extrusion granulator to obtain a herbicidal composition in the form of water dispersible granules.

[0077] Example 13:

[0078] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0079] Step 1: Weigh the active ingredients at a mass ratio of 25%, emulsifier EC-1209 at 8%, isophorone at 1.8%, DMF at 0.8%, and make up to 100% with solvent No. 150; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:5:0.5;

[0080] Step 2: First, add isophorone, DMF, the active ingredients, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes, dissolve completely until it becomes transparent. Then add emulsifier EC-1209, and finally add the remaining solvent No. 150, and stir for another 40 minutes to obtain a herbicidal composition in the form of emulsifiable concentrate.

[0081] Example 14:

[0082] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0083] Step 1: Weigh the active ingredients at a mass ratio of 35%, emulsifier EC-1209 at 11%, isophorone at 2.5%, DMF at 1.5%, and make up to 100% with solvent No. 150; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:5:10;

[0084] Step 2: First, add isophorone, DMF, the active ingredients, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes, dissolve completely until it becomes transparent. Then add emulsifier EC-1209, and finally add the remaining solvent No. 150, and stir for another 40 minutes to obtain a herbicidal composition in the form of emulsifiable concentrate.

[0085] Example 15:

[0086] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0087] Step 1: Weigh the active ingredients at a mass ratio of 45%, emulsifier EC-1209 at 13%, isophorone at 3.2%, DMF at 2.2%, and make up to 100% with solvent No. 150; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:5:20;

[0088] Step 2: First, add isophorone, DMF, the active ingredients, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes, dissolve completely until it becomes transparent. Then add emulsifier EC-1209, and finally add the remaining solvent No. 150, and stir for another 40 minutes to obtain a herbicidal composition in the form of an emulsifiable concentrate.

[0089] Example 16:

[0090] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0091] Step 1: Weigh the active ingredients at a mass ratio of 25%, dispersant SD-208 at 4.2%, ethylene glycol at 5.1%, xanthan gum at 0.8%, sodium benzoate at 0.2%, and make up to 100% with deionized water; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:10:0.5;

[0092] Step 2: Mix the active ingredients, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate, and deionized water evenly, and then use a ball mill to mill until the average particle size ≤ 5 μm to obtain a herbicidal composition in the form of a water suspension.

[0093] Example 17:

[0094] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0095] Step 1: Weigh the active ingredients at a mass ratio of 35%, dispersant SD-208 at 5.3%, ethylene glycol at 5.7%, xanthan gum at 1.0%, sodium benzoate at 0.4%, and make up to 100% with deionized water; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:10:10;

[0096] Step 2: Mix the active ingredients, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate, and deionized water evenly, and then use a ball mill to mill until the average particle size ≤ 5 μm to obtain a herbicidal composition in the form of a water suspension.

[0097] Example 18:

[0098] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0099] Step 1: Weigh the active ingredients at a mass ratio of 45%, dispersant SD-208 at 6.5%, ethylene glycol at 6.3%, xanthan gum at 1.2%, and sodium benzoate at 0.5%, and make up to 100% with deionized water; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 30:10:20;

[0100] Step 2: Mix the active ingredients, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate, and deionized water evenly, and then use a ball mill to mill to an average particle size ≤ 5 μm to obtain a herbicidal composition in the form of a water suspension.

[0101] Example 19:

[0102] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0103] Step 1: Weigh the active ingredients at a mass ratio of 25%, wetting agent NP-10 at 5%, sodium dodecylbenzenesulfonate at 2.2%, sodium alginate at 3.5%, sodium carboxymethylcellulose at 1.2%, and make up to 100% with diatomite; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 50:0.1:0.5;

[0104] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose, and diatomite into a mixer and mix evenly, then crush through an air flow crusher, pass through a 300-mesh sieve, and then use a rotary extrusion granulator for kneading granulation to obtain a herbicidal composition in the form of a water dispersible granule.

[0105] Example 20:

[0106] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0107] Step 1: Weigh the active ingredients at a mass ratio of 35%, wetting agent NP-10 at 6.5%, sodium dodecylbenzenesulfonate at 3.8%, sodium alginate at 5.5%, sodium carboxymethylcellulose at 1.5%, and make up to 100% with diatomite; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 50:0.1:10;

[0108] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose, and diatomite into a mixer and mix evenly, then crush through an air flow crusher, pass through a 300-mesh sieve, and then use a rotary extrusion granulator for kneading granulation to obtain a herbicidal composition in the form of a water dispersible granule.

[0109] Example 21:

[0110] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, including the following steps:

[0111] Step 1: Weigh 45% of the active ingredients, 8% of wetting agent NP-10, 5.4% of sodium dodecylbenzenesulfonate, 7.5% of sodium alginate, 1.8% of sodium carboxymethyl cellulose, and make up to 100% with diatomaceous earth; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 50:0.1:20;

[0112] Step 2: Add the active ingredients, wetting agent NP-10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethyl cellulose, and diatomaceous earth into a mixer and mix evenly. Then, pulverize through an air flow pulverizer, sieve through a 300-mesh sieve, and then knead and granulate using a rotary extrusion granulator to obtain a herbicidal composition in the form of water dispersible granules.

[0113] Example 22:

[0114] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, including the following steps:

[0115] Step 1: Weigh 25% of the active ingredients, 98% of emulsifier EC-1209, 1.8% of isophorone, 0.8% of DMF, and make up to 100% with solvent No. 150; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 50:5:0.5;

[0116] Step 2: First, add isophorone, DMF, the active ingredients, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes until completely dissolved and transparent, add emulsifier EC-1209, and finally add the remaining solvent No. 150 and stir for another 40 minutes to obtain a herbicidal composition in the form of an emulsifiable concentrate.

[0117] Example 23:

[0118] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, including the following steps:

[0119] Step 1: Weigh 35% of the active ingredients, 11% of emulsifier EC-1209, 2.5% of isophorone, 1.5% of DMF, and make up to 100% with solvent No. 150; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 50:5:10;

[0120] Step 2: First, add isophorone, DMF, the active ingredient, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes, it is completely dissolved until transparent. Then add emulsifier EC-1209. Finally, add the remaining solvent No. 150 and stir for another 40 minutes to obtain a herbicidal composition in the form of emulsifiable concentrate.

[0121] Example 24:

[0122] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, which includes the following steps:

[0123] Step 1: Weigh the active ingredient at 45% by mass, emulsifier EC-1209 at 13%, isophorone at 3.2%, DMF at 2.2%, and make up the solvent No. 150 to 100% by mass; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredient is 50:5:20;

[0124] Step 2: First, add isophorone, DMF, the active ingredient, and half of the solvent No. 150 into a high-speed shear mixer. After shearing for 40 minutes, it is completely dissolved until transparent. Then add emulsifier EC-1209. Finally, add the remaining solvent No. 150 and stir for another 40 minutes to obtain a herbicidal composition in the form of emulsifiable concentrate.

[0125] Example 25:

[0126] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, which includes the following steps:

[0127] Step 1: Weigh the active ingredient at 25% by mass, dispersant SD-208 at 4.2%, ethylene glycol at 5.1%, xanthan gum at 0.8%, sodium benzoate at 0.2%, and make up deionized water to 100% by mass; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredient is 50:10:0.5;

[0128] Step 2: Mix the active ingredient, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate, and deionized water evenly, and then use a ball mill to mill until the average particle size ≤ 5 μm to obtain a herbicidal composition in the form of aqueous suspension.

[0129] Example 26:

[0130] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, which includes the following steps:

[0131] Step 1: Weigh the active ingredients at a mass ratio of 35%, dispersant SD-208 5.3%, ethylene glycol 5.7%, xanthan gum 1.0%, and sodium benzoate 0.4%, and make up to 100% with deionized water; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 50:10:10;

[0132] Step 2: Mix the active ingredients, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate, and deionized water evenly, and then use a ball mill to mill until the average particle size ≤ 5 μm to obtain a herbicidal composition in the form of a water suspension.

[0133] Example 27:

[0134] This example is a preparation method of a herbicidal composition containing propanil, mesotrione, and clomazone, and includes the following steps:

[0135] Step 1: Weigh the active ingredients at a mass ratio of 45%, dispersant SD-208 6.5%, ethylene glycol 6.3%, xanthan gum 1.2%, and sodium benzoate 0.5%, and make up to 100% with deionized water; among them, the mass ratio of propanil, mesotrione, and clomazone in the active ingredients is 50:10:20;

[0136] Step 2: Mix the active ingredients, dispersant SD-208, ethylene glycol, xanthan gum, sodium benzoate, and deionized water evenly, and then use a ball mill to mill until the average particle size ≤ 5 μm to obtain a herbicidal composition in the form of a water suspension.

[0137] Comparative Example 1:

[0138] The difference between the comparative example and Example 27 is that only propanil is in the active ingredients;

[0139] Comparative Example 2:

[0140] The difference between the comparative example and Example 27 is that only mesotrione is in the active ingredients;

[0141] Comparative Example 3:

[0142] The difference between the comparative example and Example 27 is that only clomazone is in the active ingredients;

[0143] Comparative Example 4:

[0144] The difference between the comparative example and Example 27 is that clomazone is not contained in the active ingredients;

[0145] Comparative Example 5:

[0146] The difference between the comparative example and Example 27 is that mesotrione is not contained in the active ingredients;

[0147] Comparative Example 6:

[0148] The difference between the comparative example and Example 27 is that the active ingredient does not contain propanil;

[0149] The herbicidal compositions in Examples 1-27 and Comparative Examples 1-6 were diluted 600 times with water, and the dosage of the active ingredient was 50 g / hm2. 2 , the weeds in the rice field were sprayed once with stem and leaf spray at the 2-4 leaf stage, and the weed control effect was investigated 15 days after the application of the agent, and the weed control effect was investigated 30 days after the application. The test results are shown in the following table:

[0150] Sample Control efficacy at 15d, % Control efficacy at 30d, % Sample Control efficacy at 15d, % Control efficacy at 30d, % Example 1 92.4 88.9 Example 18 97.8 95.3 Example 2 93.5 89.4 Example 19 94.2 91.2 Example 3 94.1 91.4 Example 20 95.1 92.1 Example 4 95.6 92.1 Example 21 94.8 91.6 Example 5 93.7 91.2 Example 22 93.0 91.1 Example 6 94.6 91.6 Example 23 94.8 93.0 Example 7 95.8 92.1 Example 24 95.3 92.9 Example 8 96.1 92.7 Example 25 95.5 93.7 Example 9 96.8 93.0 Example 26 96.2 94.1 Example 10 95.8 91.9 Example 27 99.4 97.1 Example 11 96.0 92.5 Comparative Example 1 76.2 73.3 Example 12 95.4 92.4 Comparative Example 2 82.1 78.6 Example 13 95.2 92.0 Comparative Example 3 78.4 76.1 Example 14 95.9 91.6 Comparative Example 4 85.3 81.5 Example 15 96.2 92.2 Comparative Example 5 83.6 79.6 Example 16 97.4 94.8 Comparative Example 6 86.2 82.6 Example 17 98.3 95.9

[0151] Referring to the data in the above table, it can be known that the use of propanil, mesotrione and clomazone alone can all control weeds with good control effects. When the three or two of them are reasonably compounded, the control effect on weeds can be improved. In particular, when propanil, mesotrione and clomazone are compounded and the mass ratio of propanil, mesotrione and clomazone is 50:10:20, the weed control efficiency for 15 days can reach 99.4%, and the weed control efficiency for 30 days can reach 97.1%.

[0152] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0153] The above contents are merely examples and explanations of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the invention or exceed the scope defined by the claims, they shall all fall within the protection scope of the present invention.

Claims

1. A herbicidal composition containing propanil, mesotrione and clomazone, characterized in that, it comprises 25 - 45% by mass of active ingredients, and the remainder is auxiliary materials; the active ingredients are a mixture of propanil, mesotrione and clomazone; the mass ratio of propanil, mesotrione and clomazone is 10 - 50:0.1 - 10:0.5 - 20.

2. The herbicidal composition containing propanil, mesotrione and clomazone according to claim 1, characterized in that, the mass ratio of propanil, mesotrione and clomazone is 30 - 50:10:0.5 - 20.

3. The herbicidal composition containing propanil, mesotrione and clomazone according to claim 2, characterized in that, the mass ratio of propanil, mesotrione and clomazone is 50:10:

20.

4. The herbicidal composition containing propanil, mesotrione and clomazone according to claim 1, characterized in that, the auxiliary materials are wetting agent NP - 10, sodium dodecylbenzenesulfonate, sodium alginate, sodium carboxymethylcellulose and diatomaceous earth.

5. The herbicidal composition containing propanil, mesotrione and clomazone according to claim 1, characterized in that, the pesticide dosage form of the herbicidal composition is water dispersible granules, emulsifiable concentrate, water suspension concentrate, wettable powder, aqueous solution, dispersible oil suspension or microemulsion.

Images