Weeding composition and application thereof

Abstract

The invention belongs to the technical field of herbicides, and particularly discloses a weeding composition and application thereof. The weeding composition is prepared from the following components: cyhalofop-butyl, dimethyl.bentazone and gamma-aminobutyric acid, and the mass ratio of the cyhalofop-butyl to the dimethyl.bentazone to the gamma-aminobutyric acid is (8 to 10) to (8 to 10) to (3 to 4). The weeding composition can effectively prevent and remove weeds in paddy fields, especially cyperaceae weeds.

Description

Technical Field

[0001] This invention relates to the field of herbicide technology, and in particular to a herbicide composition and its application. Background Technology

[0002] Rice paddy weeds compete with rice for resources such as water, nutrients, sunlight, and space, affecting rice photosynthesis and thus interfering with normal rice growth. Based on the target weeds controlled by herbicides, rice paddy weeds can be divided into three main categories: grasses, sedges, and broadleaf weeds. Globally, rice paddy weed management has always been a crucial aspect of improving rice yield and ensuring rice quality. Currently, rice weeds are mainly controlled using chemical pesticides. However, with the long-term use of single-variety herbicides in rice paddies and changes in cultivation methods, the weed composition has changed significantly, weed resistance has increased, and different herbicides have different weed control spectra and efficacy due to their different chemical structures and targets. The current solution is to address the problem of high toxicity and poor efficacy of single pesticides by combining herbicides with other herbicides or herbicides with fertilizers / plant growth regulators. However, it is unpredictable whether the interaction between herbicides or between herbicides and other ingredients can delay the development of herbicide resistance and achieve ideal results. Therefore, the control effects of different herbicide combinations on specific weed species and their impact on crop growth safety still need to be further investigated. Summary of the Invention

[0003] In view of the above, it is necessary to provide a herbicidal composition and its application. The herbicidal composition of the present invention, by combining cyhalofop-butyl, dimethyl metsulfuron-methyl, and γ-aminobutyric acid, can effectively control weeds in paddy fields, especially sedges.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A herbicidal composition comprising the following components: cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid, wherein the mass ratio of cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid is (8-10):(8-10):(3-4).

[0006] Furthermore, the mass ratio of cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid is 10:10:3.

[0007] Furthermore, the cyhalofop-butyl is 4% cyhalofop-butyl, the dimethyl metribuzin is 460 g / L dimethyl metribuzin, and the γ-aminobutyric acid is 450 g / L γ-aminobutyric acid.

[0008] The present invention also provides the application of the herbicidal composition in the preparation of a herbicide for controlling weeds in paddy fields.

[0009] The present invention also provides the application of the herbicidal composition in the control of weeds in paddy fields.

[0010] Furthermore, the weeds are sedges.

[0011] The present invention also provides a method for controlling sedges in paddy fields, the method comprising: spraying the leaves with the herbicidal composition as described in any one of claims 1-3 at the 3-4 leaf stage of rice.

[0012] Furthermore, the application rate of the herbicidal composition is 1.9-2.4 kg / ha.

[0013] The present invention has the following beneficial effects:

[0014] This invention combines flufenacet, dimethyl metribuzin, and γ-aminobutyric acid to effectively control weeds in rice paddies, especially sedges, resulting in better rice growth, greener leaves, and taller plants, while also reducing the amount of pesticides used. Detailed Implementation

[0015] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with specific embodiments.

[0016] All features disclosed in this specification, or all steps in all disclosed methods or processes, may be combined in any way, except for mutually exclusive features and / or steps.

[0017] Unless otherwise stated, each feature disclosed in this specification (including any appended claims and abstract) is merely one example of a series of equivalent or similar features.

[0018] First, the present invention provides a herbicidal composition comprising the following components: cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid, wherein the mass ratio of cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid is (8-10):(8-10):(3-4).

[0019] For example, the mass ratio of cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid can be (8:8:3), (9:9:3.5), (10:10:4) or (10:10:3).

[0020] Preferably, in this invention, the cyhalofop-butyl used is 4% cyhalofop-butyl, the dimethyl metribuzin is 460 g / L dimethyl metribuzin, and the γ-aminobutyric acid is 450 g / L γ-aminobutyric acid.

[0021] Secondly, the present invention provides an application of the above-mentioned herbicidal composition in the preparation of a herbicide for controlling weeds in paddy fields.

[0022] For example, the herbicide may also include excipients, which may include at least one of emulsifiers, dispersants, wetting agents, spreading agents, stabilizers, defoamers, synergists, penetrants, adhesives, carriers or fillers.

[0023] For example, the formulation of the herbicide is selected from at least one of wettable powder, soluble powder, emulsifiable concentrate, aqueous suspension, dispersible oil suspension, soluble liquid, water emulsion, microemulsion and water dispersible granules.

[0024] Finally, the present invention also provides an application of the above-mentioned herbicide in controlling weeds in paddy fields.

[0025] Specifically, a method is provided for controlling sedges in rice paddies using the above-mentioned herbicide, wherein the method involves foliar spraying the herbicide composition at the 3-4 leaf stage of rice.

[0026] Preferably, the application rate of the herbicidal composition is 1.9-2.4 kg / ha.

[0027] For example, the application rate of the herbicidal composition can be 1.9 kg / ha, 2.0 kg / ha, 2.1 kg / ha, 2.4 kg / ha, etc.

[0028] The present application will be further described below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the present application.

[0029] Example 1

[0030] This embodiment provides a herbicidal composition comprising the following components: cyhalofop-butyl, dimethyl betahistine, and γ-aminobutyric acid (GABA), wherein the mass ratio of cyhalofop-butyl, dimethyl betahistine, and GABA is 10:10:3. The cyhalofop-butyl used is 4% cyhalofop-butyl, the dimethyl betahistine is 460 g / L dimethyl betahistine, and the GABA is 450 g / L GABA.

[0031] Example 2

[0032] This embodiment provides a method for controlling sedges in rice using the herbicidal composition described in Embodiment 1. The method involves foliar spraying the herbicidal composition described in Embodiment 1 at the 3-4 leaf stage of rice. The application rate of the herbicidal composition is 2.3 kg / ha, that is, the application rate of cyhalofop-butyl is 1 kg / ha, the application rate of dimethyl metribuzin is 1 kg / ha, and the application rate of γ-aminobutyric acid is 300 g / ha.

[0033] Comparative Example 1

[0034] This comparative example provides a method for controlling sedges in rice, wherein 4% cyhalofop-butyl is sprayed on the leaves at the 3-4 leaf stage of rice, with a spraying rate of 2 kg / ha.

[0035] Comparative Example 2

[0036] This comparative example provides a method for controlling sedges in rice, wherein 4% cyhalofop-butyl is sprayed on the leaves at the 3-4 leaf stage of rice, with a spraying rate of 1 kg / ha.

[0037] Comparative Example 3

[0038] This comparative example provides a method for controlling sedges in rice. The method involves foliar spraying with 460 g / L dimethyl metribuzin at the 3-4 leaf stage of rice, with a spraying rate of 2 kg / ha.

[0039] Comparative Example 4

[0040] This comparative example provides a method for controlling sedges in rice. The method involves foliar spraying with 460 g / L dimethyl metribuzin at the 3-4 leaf stage of rice, with a spraying rate of 1 kg / ha.

[0041] Comparative Example 5

[0042] This embodiment provides a method for controlling sedges in rice using the herbicidal composition described in Embodiment 1 above. The method involves foliar spraying a composition of 4% cyhalofop-butyl and 460 g / L dimethyl metribuzin (mass ratio 1:1) at the 3-4 leaf stage of rice. The spraying amount is 4 kg / ha, that is, the spraying amount of cyhalofop-butyl is 2 kg / ha, and the spraying amount of dimethyl metribuzin is 2 kg / ha.

[0043] Comparative Example 6

[0044] This embodiment provides a method for controlling sedges in rice using the herbicidal composition described in Embodiment 1 above. The method involves foliar spraying a composition of 4% cyhalofop-butyl and 460 g / L dimethyl metribuzin (mass ratio 1:1) at the 3-4 leaf stage of rice, with a spraying rate of 2 kg / ha, that is, the spraying rate of cyhalofop-butyl is 1 kg / ha and the spraying rate of dimethyl metribuzin is 1 kg / ha.

[0045] Effect verification

[0046] To verify the effectiveness of the methods in Example 2 and Comparative Examples 1-4 in controlling sedge in rice, the following experiments were conducted:

[0047] 1. Experimental treatment

[0048] The experiment consisted of 6 treatments, each covering 10 m², arranged sequentially. Five of the treatments corresponded to the methods used in Example 2 and Comparative Examples 1-4, respectively, while the remaining treatment, sprayed with water, served as a blank control (ck).

[0049] 2. Survey Indicators and Methods

[0050] Table 1 Survey Indicators and Methods

[0051]

[0052] 3. Test Results

[0053] Table 2 Effects of different treatments on the control efficacy (%) of rice sedge fresh weight

[0054]

[0055] As shown in Table 2, the control efficacy of Comparative Examples 5 and 6 is greater than that of Comparative Examples 1-4, indicating that the combined use of cyhalofop-butyl and MCPA-benzanol can improve the control efficacy against rice sedge. The control efficacy of Example 2 is greater than that of Comparative Examples 5 and 6 and is about twice that of Comparative Example 6, indicating that the combined use of GABA with cyhalofop-butyl and MCPA-benzanol, after halving the dosage of cyhalofop-butyl and MCPA-benzanol, can significantly improve the efficacy, achieving the effect of reducing dosage and increasing efficacy. Moreover, in terms of rice growth, the rice in Example 2 has significantly better growth, greener leaves, and taller plants.

Claims

1. A herbicidal composition, characterized in that, The herbicidal composition comprises the following components: cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid, wherein the mass ratio of cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid is (8-10):(8-10):(3-4).

2. The herbicidal composition according to claim 1, characterized in that, The mass ratio of cyhalofop-butyl, dimethyl metribuzin and γ-aminobutyric acid is 10:10:

3.

3. The herbicidal composition according to claim 1, characterized in that, The cyhalofop-butyl is 4% cyhalofop-butyl, the dimethyl metribuzin is 460 g / L dimethyl metribuzin, and the γ-aminobutyric acid is 450 g / L γ-aminobutyric acid.

4. The use of the herbicidal composition according to any one of claims 1-3 in the preparation of a herbicide for controlling weeds in paddy fields.

5. The use of the herbicidal composition according to any one of claims 1-3 in controlling weeds in paddy fields.

6. The application as described in claim 5, characterized in that, The weeds in question are sedges belonging to the Cyperaceae family.

7. A method for controlling sedge weeds in paddy fields, characterized in that, The method is as follows: during the 3-4 leaf stage of rice, the herbicidal composition as described in any one of claims 1-3 is sprayed on the leaves.

8. The method for controlling sedges in paddy fields according to claim 8, characterized in that, The application rate of the herbicidal composition is 1.9-2.4 kg / ha.

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