A dispersible oil suspension containing isoproturon, mesosulfuron-methyl and diflufenican

Abstract

The present invention provides a dispersible oil suspension containing isoproturon, mesosulfuron-methyl and flufenican, comprising the following components in weight percentage: active ingredients 10-70%, dispersant 1-15%, emulsifier 1-10%, organic bentonite 0.5-5%, silica white 0.5-2%, methyl oleate 1-10%, and solvent to make up 100%; the active ingredients are composed of isoproturon, mesosulfuron-methyl and flufenican, and the mass ratio of isoproturon, mesosulfuron-methyl and flufenican is 20-35:0.1-2:1-10. The dispersible oil suspension of the present invention has excellent suspension, water dispersibility, and low persistent foaming property. It can significantly improve the weeding effect, effectively reduce the application dose of the active ingredients, and reduce environmental pollution.

Description

Technical Field

[0001] The present invention belongs to the field of herbicides, and particularly relates to a dispersible oil suspension agent containing isoproturon, mesosulfuron-methyl and diflufenican and its application. Background Art

[0002] Wheat is the most important food crop in China, mainly winter wheat, accounting for about 90%. Weeds in wheat fields affect the growth of wheat. There are about 30 main weeds in wheat fields, such as Alopecurus aequalis, Alopecurus japonicus, Bromus japonicus, Poa annua, Sclerochloa dura, Polypogon fugax, Miscanthus sinensis, Galium aparine, Malachium aquaticum, Veronica didyma, Monochoria vaginalis, Polygonum lapathifolium, Sagina japonica, Vicia sativa, Brassica campestris, Descurainia sophia, Vicia sativa, Silene conoidea, Capsella bursa-pastoris, Euphorbia helioscopia, Convolvulus arvensis, Cirsium setosum. Since the long-term single use of chemical agents is likely to cause the generation of weed resistance and pollute the environment, finding a herbicide preparation that can improve the weeding effect and reduce the application dose of active ingredients is the research and development focus of many domestic pesticide companies.

[0003] Isoproturon is mainly absorbed by the roots and stems and leaves of weeds, interfering with the progress of photosynthesis. Under light, oxygen and carbon dioxide cannot be released, and the generation of organic substances stops, and sensitive weeds die of starvation. Mesosulfuron-methyl is a systemic selective foliar herbicide for controlling gramineous weeds and some broad-leaved weeds in wheat fields after emergence. Diflufenican has the effect of inhibiting the biosynthesis of carotenoids. The content of carotenoids in weed plants that absorb the agent decreases, resulting in the destruction of chlorophyll and the rupture of cell membranes. The weeds show decolorization of young buds and finally wither and die as a whole. Mixing the three can effectively control annual gramineous and broad-leaved weeds in wheat fields.

[0004] A dispersible oil suspension agent is a suspension preparation formed by one or several solid pesticide active ingredients that are poorly soluble or slightly soluble in a non-aqueous medium, relying on surfactants and viscosity regulators. At present, the dispersible oil suspension agent has the following disadvantages: there are fewer supporting dispersants for the dispersible oil suspension agent, the physical stability is lower than that of the suspension agent, the dispersion medium is not easily emulsified and dispersed, and the cost is relatively high. Our company has registered a 36% diflufenican·mesosulfuron-methyl·isoproturon dispersible oil suspension agent, and the registration number is PD20212621; it can be used for annual weeds in wheat fields, and the application dose is 150-200 ml / mu; it has systemic conductivity, is absorbed by the stems and leaves of weeds, and conducts to the growth points of weeds. However, in actual use, it is found that the preparation performance and herbicidal activity are relatively low. In view of the deficiencies of the prior art, the present invention develops a dispersible oil suspension agent with excellent preparation performance and biological activity. Summary of the Invention

[0005] The present invention provides a dispersible oil suspension agent containing isoproturon, mesosulfuron-methyl and diflufenican and its application. The specific technical solutions are as follows:

[0006] A dispersible oil suspension containing isoproturon, mesosulfuron-methyl and flufenacet, comprising the following components in weight percentages: active ingredients 10 - 70%, dispersant 1 - 15%, emulsifier 1 - 10%, organic bentonite 0.5 - 5%, silica white 0.5 - 2%, methyl oleate 1 - 10%, and solvent to make up 100%;

[0007] The active ingredients consist of isoproturon, mesosulfuron-methyl and flufenacet, and the mass ratio of isoproturon, mesosulfuron-methyl and flufenacet is 20 - 35:0.1 - 2:1 - 10. Preferably, the mass ratio of isoproturon, mesosulfuron-methyl and flufenacet is 25 - 35:0.1 - 1:1 - 5.

[0008] The dispersant is one or more of Tersperse2510, calcium dodecylbenzenesulfonate, Terwet-1010, Agrlian-700, Morwet D-390, Atlox 4915; preferably, the dispersant is a combination of Tersperse2510, Agrlian-700 and Morwet D-390, and the mass ratio of Tersperse2510, Agrlian-700 and Morwet D-390 is 1 - 5:1 - 5:1 - 5;

[0009] The emulsifier is agricultural emulsion 500 or Tween 80; preferably, it is agricultural emulsion 500.

[0010] The solvent is soybean oil.

[0011] The present invention provides a dispersible oil suspension, comprising the following components in weight percentages: 25 - 35% isoproturon, 0.1 - 1.5% mesosulfuron-methyl, 1 - 8% flufenacet, 1 - 5% Tersperse2510, 1 - 5% Agrlian-700, 1 - 5% Morwet D-390, 0.5 - 5% bentonite, 0.5 - 2% silica white, 1 - 10% methyl oleate, and soybean oil to make up 100%.

[0012] The present invention provides a dispersible oil suspension, comprising the following components in weight percentages: 31.6% isoproturon, 0.4% mesosulfuron-methyl, 4% flufenacet, 4% Tersperse2510, 2.5% Agrlian-700, 2.5% Morwet D-390, 1.5% bentonite, 1.0% silica white, 5% methyl oleate, and soybean oil to make up 100%.

[0013] The said dispersible oil suspension is used for controlling weeds in crop fields. Especially for controlling annual weeds in wheat fields.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The oil-dispersible suspension concentrate prepared by the present invention has excellent suspension performance, and its suspension rate is 99.5%; and it has excellent water-dispersibility, no particulate matter sinks, and the whole presents a cloud-like separation; it has low persistent foaming property.

[0016] The ternary composition oil-dispersible suspension concentrate prepared by the present invention can significantly improve the weeding effect and can effectively reduce the application dosage of the active ingredient. Detailed implementation manners

[0017] According to the following embodiments, the present invention can be better understood. However, those skilled in the art can easily understand that the content described in the embodiments is only used to illustrate the present invention and should not and will not limit the present invention described in detail in the claims.

[0018] Example 1: Formulation of ternary compound weeding oil-dispersible suspension concentrate

[0019] Test materials:

[0020] Isoproturon technical, mesosulfuron-methyl technical and flufenican technical; Tersperse2510, calcium dodecylbenzenesulfonate, Terwet-1010, Agrl ian-700, Morwet D-390, Atlox 4915, Tween 80, agricultural emulsifier 500, organic bentonite, silica white, methyl oleate, soybean oil; all purchased from reagent companies.

[0021] Main instrument and equipment: electronic balance, multi-functional dispersion sand mill, magnetic stirrer, high-speed shearer, high-performance liquid chromatograph, pH meter, laser particle size distribution analyzer;

[0022] Preparation process: Weigh the required technical drugs, auxiliaries and solvents accurately; stir and disperse the isoproturon technical, mesosulfuron-methyl technical, flufenican technical, emulsifier, organic bentonite, silica white and solvent evenly with a magnetic stirrer, add the dispersant and shear evenly with a high-speed shearer, transfer the evenly sheared slurry into a sand mill for primary sanding and secondary sanding in sequence. After the sanding is completed, take samples to detect indexes such as particle size, dispersion and emulsification. After passing the test, filter and fill. The specific raw material composition and weight percentage are shown in Table 1.

[0023] Table 1 Composition of oil-dispersible suspension concentrate formulation

[0024] Formulation components Preparation 1 Preparation 2 Preparation 3 Preparation 4 Preparation 5 Preparation 6 Isoproturon 31.6 31.6 31.6 31.6 31.6 31.6 Mesosulfuron-methyl 0.4 0.4 0.4 0.4 0.4 0.4 Diflufenican 4 4 4 4 4 4 Tersperse 2510 4.0 4.0 4.0 4.0 4.0 4.0 Calcium dodecylbenzenesulfonate 2.5 Terwet-1010 2.5 2.5 Agrlian-700 2.5 2.5 2.5 Morwet D-390 2.5 2.5 2.5 Atlox 4915 2.5 2.5 Tween 80 2.5 2.5 Agricultural emulsifier 500 2.5 2.5 2.5 2.5 2.5 Organophilic bentonite 1.5 1.5 1.5 1.5 1.5 1.5 Silica white 1.0 1.0 1.0 1.0 1.0 1.0 Methyl oleate 5％ 5％ 5％ 5％ 5％ 5％ Soybean oil Make up Make up Make up Make up Make up Make up

[0025] Quality indexes: Test according to industry standards.

[0026] Table 2 Quality indexes of oil-dispersible suspension concentrate

[0027]

[0028] Note: Preparation 7 is a dispersible oil suspension of 36% pyraflufen-ethyldimethametryn-isoproturon, and the registration number is PD20212621.

[0029] Result analysis:

[0030] The dispersible oil suspension prepared from the formulation system in Preparation 1 has excellent suspension performance, with a suspension rate of 99.5%; and has excellent water-dispersibility, no particulate matter sinks, and is overall separated in a cloud-like shape; and has low persistent foaming property.

[0031] Compared with Preparations 2-6, the dispersants in the dispersible oil suspension are Tersperse2510, Agrlian-700 and Morwet D-390; the emulsifier is Nongru 500, which can significantly improve the suspension property and water-dispersibility of the preparation and reduce the persistent foaming property.

[0032] Compared with the commercial preparation, the suspension property and water-dispersibility of Preparation 2 are significantly improved, and the persistent foaming property is reduced.

[0033] Field efficacy determination of the compound medicament in Example 2 against weeds in wheat fields

[0034] Test objects: Weeds in wheat fields: Alopecurus aequalis, Digitaria sanguinalis, Poa annua, Stellaria media, Avena fatua

[0035] Test method: Set 7 medicament treatments and 1 blank control, repeated 3 times; the area of each plot is 45 m2, and they are randomly arranged. Stem and leaf spraying treatment is carried out with a sprayer. The control effect of weed fresh weight is investigated 30 days after application.

[0036] Table 3 Control effect of the compound preparation against weeds in wheat fields

[0037]

[0038] Result analysis:

[0039] The dispersible oil suspension prepared from the formulation system in Preparation 1 significantly improves the control effect of the medicament, and the control effect is 98.1%. The control effects of Preparations 2-4 and Preparation 6 are comparable to those of the commercial preparation. The ternary composition dispersible oil suspension prepared by the present invention can significantly improve the weeding effect and can effectively reduce the application dose of the active ingredient.

[0040] Formulation of the ternary compound herbicidal composition dispersible oil suspension in Example 3

[0041] Table 4 Formulation composition of the dispersible oil suspension

[0042] Formulation components Preparation 7 Preparation 8 Preparation 9 Preparation 10 Preparation 11 Preparation 12 Isoproturon 30 28 33 32 35 25 Mesosulfuron-methyl 0.5 1 1.5 1 1.5 0.5 Diflufenican 3.5 5 5.5 3 5 2 Tersperse 2510 5 4 3 2 3 6 Agrlian-700 2 2 3 5 4 1 Morwet D-390 1 2 2 1 2 1 Agricultural emulsifier 500 2 1 2 3 2 3 Organophilic bentonite 1.5 1.5 1.5 1.5 1.5 1.5 Silica white 1.0 1.0 1.0 1.0 1.0 1.0 Methyl oleate 5％ 5％ 5％ 5％ 5％ 5％ Soybean oil Make up Make up Make up Make up Make up Make up

[0043] The above are only the preferred embodiments of the present invention. For those skilled in the art, without departing from the raw materials of the present invention, appropriate improvements can be made, and these improvements are also within the protection scope of the present invention.

Claims

1. A dispersible oil suspension agent containing isoproturon, mesosulfuron-methyl and flufenican, characterized in that, Comprising the following components in weight percentage: isoproturon 31.6%, mesosulfuron-methyl 0.4%, diflufenican 4%, Tersperse 2510 4%, Agrlian-700 2.5%, Morwet D-390 2.5%, agricultural emulsifier 500 2.5%, organic bentonite 1.5%, white carbon black 1%, methyl oleate 5%, soybean oil to make up 100%.

2. Use of the dispersible oil suspension agent according to claim 1 for controlling weeds in crop fields, characterized in that, The crop is wheat.

Images