Herbicide composition and application thereof

Abstract

According to the herbicide composition and the application thereof, saflufenacil, pendimethalin and prometryn are scientifically proportioned and combined for the first time, due to the innovative matching, not only is the advantage complementation of herbicides achieved, but also the weeding effect is remarkably enhanced, the synergistic effect is obvious, the lasting period is long, and the herbicide composition has a good application prospect. The herbicide composition provided by the invention has an excellent control effect on field malignant weeds such as solanum nigrum and chenopodium album, and makes up for the defects and limitation of use of a single agent. Besides, the herbicide composition disclosed by the invention has high safety to important crops such as corn, cotton, soybeans, peanuts and the like, and does not damage the crops even in a compound planting mode, so that the problem that proper herbicide selection is lacked in the compound planting mode for a long time is successfully solved; powerful support is provided for promoting the sustainable development of modern agriculture.

Description

Technical Field

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

[0002] As the country pays more and more attention to the strategic security of grain, cotton and oil, the optimization of agricultural planting structure and technological innovation have become key measures to ensure national food security and sustainable agricultural development. In this context, corn-soybean compound planting, corn-peanut compound planting and corn-cotton compound planting have been rapidly promoted and widely used in my country's main grain producing areas as important means to improve land use efficiency, increase crop yields and ensure grain and oil supply.

[0003] The composite cropping model simultaneously plants two or more crops on the same plot of land, taking advantage of the ecological complementarity between crops to maximize the use of land resources and improve agricultural production efficiency. As a high-yield crop, corn, when planted with soybeans, peanuts, and cotton, can not only stabilize corn production, but also increase the production of soybeans, peanuts, and cotton, effectively alleviating the contradiction between the supply and demand of grain and oil in my country and strengthening the country's food security line of defense. However, with the widespread implementation of the composite cropping model, the safety issues of chemical weed control in the field have gradually become prominent, becoming a major bottleneck restricting the promotion and application of this technology.

[0004] Pre-emergence weed control is an important means to control weed growth and reduce the pressure of later weed control. However, in the composite cropping model, there are relatively few pesticides suitable for pre-emergence weed control, and these pesticides often have narrow weed control spectrum and short duration. Due to the different sensitivities of different crops to herbicides, it is difficult to find a pre-emergence herbicide that can effectively control weeds without causing damage to crops, which poses a great challenge to field management in the composite cropping model.

[0005] Existing corn field post-emergence herbicides, such as nicosulfuron, atrazine, mesotrione, clofopyralid, dimethoate, etc., are effective when used alone in corn fields, but in the composite planting model, these herbicides have serious phytotoxicity to companion crops such as soybeans, peanuts, and cotton. Phytotoxicity not only hinders the growth of companion crops and reduces their yields, but may even lead to crop death in severe cases, seriously affecting the economic benefits and ecological safety of composite planting. Summary of the invention

[0006] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0007] In view of the above problems and / or the problems existing in the prior art, the present invention is proposed.

[0008] Therefore, the object of the present invention is to overcome the deficiencies in the prior art and provide a herbicide composition.

[0009] In order to solve the above technical problems, the present invention provides the following technical solution: the herbicide composition comprises 29.15-59.2% of the herbicide active ingredient by mass percentage, and the remainder is an adjuvant acceptable in pesticides;

[0010] The active ingredients of the herbicide are pendimethalin, promethazine and saflufenacil.

[0011] As a preferred embodiment of the herbicide composition of the present invention, the herbicide composition comprises, by mass percentage,

[0012] 20% to 40% of pendimethalin, 9% to 18% of promethazine, and 0.15% to 1.2% of saflufenacil.

[0013] As a preferred embodiment of the herbicide composition of the present invention, the mass ratio of pendimethalin, prometryn and saflufenacil is 20:9:0.15-0.6.

[0014] As a preferred embodiment of the herbicide composition of the present invention, the mass ratio of pendimethalin, prometryn and saflufenacil is 20:9:0.3-0.6 or 20:9:0.15-0.225.

[0015] Furthermore, the mass ratio of pendimethalin, promethazine and saflufenacil is preferably 20:9:0.15, 20:9:0.2, 20:9:0.225, 20:9:0.3, 20:9:0.4, 20:9:0.45 or 20:9:0.6.

[0016] As a preferred embodiment of the herbicide composition of the present invention, the pesticide-acceptable adjuvant includes a pesticide-acceptable surfactant and a pesticide-acceptable carrier.

[0017] As a preferred embodiment of the herbicide composition of the present invention, the dosage form of the herbicide composition includes one of a suspension concentrate, a suspoemulsion, a microcapsule suspension-suspension concentrate, an aqueous emulsion, a dispersible oil suspension, and an emulsifiable concentrate.

[0018] Another object of the present invention is to provide an application of the herbicide composition.

[0019] As a preferred embodiment of the application of the herbicide composition of the present invention, the herbicide composition is used for preventing and controlling broadleaf and grass weeds.

[0020] As a preferred embodiment of the application of the herbicide composition of the present invention, the herbicide composition is used for weed control in a single crop planting or composite cropping cultivation mode.

[0021] As a preferred embodiment of the application of the herbicide composition of the present invention, the single crop planting includes one of corn, cotton, soybean, and peanut, and the composite planting cultivation includes one or more of corn-soybean, corn-cotton, and corn-peanut.

[0022] As a preferred embodiment of the application of the herbicide composition of the present invention, the herbicide composition is applied at a dosage of 437.25 ga.i / ha to 1776 ga.i / h.

[0023] Beneficial effects of the present invention:

[0024] (1) The present invention is the first to scientifically combine the ultra-high-efficiency herbicide safensulfuron with pendimethalin and promethazine. This innovative combination not only achieves complementary advantages between the herbicides, but also significantly enhances the weed control effect and shows a significant synergistic effect. At the same time, the composition has a long lasting effect, which can effectively reduce the frequency of repeated application of pesticides, reduce the cost of use, and improve the efficiency of farmland management.

[0025] (2) The herbicide combination of the present invention exhibits an extremely excellent control effect on common malignant weeds in the field, such as Solanum nigrum, Chenopodium album and other broad-leaved weeds. This feature effectively compensates for the problems of insufficient control effect and limited scope of application when a single herbicide is used, and provides a more comprehensive and efficient weed management solution.

[0026] (3) The herbicide combination of the present invention is highly safe for important crops such as corn, cotton, soybeans, and peanuts, and will not cause damage to crops even in a composite planting mode. This feature has opened up a new chapter in the application of the herbicide combination in composite planting systems such as corn-soybean, corn-peanut, and corn-cotton, successfully solving the long-standing problem of lack of suitable herbicide selection in composite planting modes, and providing strong support for promoting the sustainable development of modern agriculture. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the embodiments of the specification.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Unless otherwise specified, the raw materials used in the present invention are all commercially available in the art.

[0031] The herbicide compositions of different formulations prepared in the specific embodiments of the present invention are all prepared according to conventional methods in the art.

[0032] The survival rate and combined effect of the herbicide composition of the present invention on grass and broad-leaved weeds were determined by indoor toxicity test, and the test method is as follows:

[0033] The experiment adopted the greenhouse potting method. The seeds of Amaranthus retroflexus, Solanum nigrum, Setaria viridis, and Eleocharis truncatula were germinated and sown in small flower pots filled with 3 / 5 culture soil. 8×8 seeds were sown in each pot and covered with 1-2mm of soil after sowing. Water was added to the tray with the small flower pots. After the water completely soaked the culture soil, the excess water in the tray was poured out.

[0034] 24 hours after sowing, the soil was sprayed with ASS0-5 walking spray tower (spraying the test agent), and clean water was set as a blank control. Then the plants were transferred to the greenhouse for further cultivation and observation. After 20 days, the aboveground fresh weight of the weeds in each treatment was investigated. Except for 1 to 2 days after spraying, water was applied regularly to maintain soil moisture.

[0035] Weed survival rate calculation method:

[0036] E Weed survival rate % = fresh weight of weeds in treatment group / fresh weight of weeds in blank control group * 100%

[0037] The herbicidal activity of the mixture was tested by the Colby method, i.e., E0 = ABC / 10000;

[0038] Wherein, A is the single-dose weed survival rate of herbicide 1 (pentadimethoate), B is the single-dose weed survival rate of herbicide 2 (promethazine), C is the single-dose weed survival rate of herbicide 3 (safensulfuron), and E0 is the theoretical survival rate of mixed herbicides;

[0039] E is the measured survival rate of the mixed herbicide. According to the Colby method, when E0-E ≥ 10%, it means that the mixed herbicide has a synergistic effect; when E0-E ≤ -10%, it means that the mixed herbicide has an antagonistic effect; when the E0-E value is between ±10%, it means that the mixed herbicide has an additive effect.

[0040] The selectivity index of the herbicide composition of the present invention for corn, cotton, soybean and peanut is determined by reference to:

[0041] The experiment adopted the greenhouse pot method. The seeds of corn, soybean, cotton, and peanut were germinated and sown in small pots filled with 3 / 5 culture soil, and 3*3 seeds were sown in each pot. The seeds of crabgrass and gray quinoa were germinated and sown in small pots filled with 3 / 5 culture soil, and 8×8 seeds were sown in each pot. After sowing, the soil was covered with 1-2mm of soil. Water was added to the tray with the small flower pot. After the water completely soaked the culture soil, the excess water in the tray was poured out. 24h after sowing, the soil was sprayed with ASS-5 walking spray tower, and clear water was set as a blank control. Then it was transferred to the greenhouse for further cultivation and observation. After 30 days, the plant height of corn, soybean, cotton and peanut, as well as the aboveground fresh weight of each treated weed were investigated. Except for 1-2 days after spraying, watering was not allowed, and watering was done regularly to maintain soil moisture.

[0042] Weed control effectiveness calculation method:

[0043] Ex weed control efficiency % = 1-fresh weight of weeds in treatment group / fresh weight of weeds in blank control group * 100%

[0044] Ei Crop height inhibition rate % = 1-crop height in treatment group / crop height in blank control group * 100%

[0045] The lowest effective dose ED90 of the pesticide on major sensitive weeds was used as the herbicide activity evaluation index, and the highest safe dose ED10 (NOEL) when the plant height inhibition rate of the pesticide on the applied crop did not exceed 10% was used as the crop safety evaluation index.

[0046] Selectivity coefficient I = ED10 / ED90

[0047] When I ≥ 4, the agent is considered to have excellent selectivity and good value for field promotion;

[0048] When I ≥ 2, the agent is considered to have a certain degree of selectivity and can be used for field trials;

[0049] When I<2, it is considered that the agent has poor selectivity and has no development potential.

[0050] Example 1

[0051] This example is used to detect the control effect of pendimethalin alone on Amaranthus retroflexus, Solanum nigrum, Setaria viridis and Goosegrass. Specifically, the pendimethalin original drug was dissolved in acetone, and then prepared into a test agent with a dosage concentration of 300, 450, and 600 ga.i / ha with a 0.1% surfactant (Tween 80: Span 20 = 2:1) aqueous solution. The treatment effect of pendimethalin on different weeds under various concentration conditions was tested, and the results are shown in Table 1.

[0052] Table 1 The treatment effect of single pendimethalin on different weeds

[0053]

[0054] Example 2

[0055] This example is used to detect the control effect of prometryn alone on Amaranthus retroflexus, Solanum nigrum, Setaria viridis and Eleocharis truncatula. Specifically, the original drug of prometryn was dissolved in acetone, and then prepared into a test agent with dosage concentrations of 135, 202.5, and 270 ga.i / ha using a 0.1% surfactant (Tween 80: Span 20 = 2:1) aqueous solution. The treatment effect of prometryn on different weeds under various concentration conditions was tested, and the results are shown in Table 2.

[0056] Table 2 The treatment effect of single promethazine on different weeds

[0057]

[0058] Example 3

[0059] This example is used to detect the control effect of saflufenacil alone on Amaranthus retroflexus, Solanum nigrum, Setaria viridis and Goosegrass. Specifically, saflufenacil original drug was dissolved in acetone, and then prepared into a test agent with dosage concentrations of 135, 202.5, and 270 ga.i / ha using a 0.1% surfactant (Tween 80: Span 20 = 2:1) aqueous solution. The treatment effect of saflufenacil on different weeds under various concentration conditions was tested, and the results are shown in Table 3.

[0060] Table 3 Treatment effect of single benzylsulfuron on different weeds

[0061]

[0062]

[0063] Example 4

[0064] This embodiment provides the combined effect of different ratios of herbicide compositions on the survival rate of Amaranthus retroflexus. Specifically, the herbicide active ingredients are composed of pendimethalin, promethazine, and saflufenacil. The pendimethalin technical, promethazine technical, and saflufenacil technical are dissolved in acetone and then prepared with a 0.1% surfactant (Tween 80: Span 20 = 2:1) aqueous solution to a required concentration for use. The effects of different ratios on the survival rate of Amaranthus retroflexus and the combined effects are tested. The formula and results are shown in Table 4.

[0065] Table 4 The survival rate test and combined action evaluation results of different ratios of herbicidal compositions on Amaranthus retroflexus

[0066]

[0067]

[0068] It can be seen from Table 4 that when the ratio of pendimethalin, promethazine and saflufenacil is 20:9:0.3, 20:9:0.45, 20:9:0.6, 30:13.5:0.3, 30:13.5:0.45, 30:13.5, 40:18:0.3, 40:18:0.45, 40:18:0.6, the composition under this ratio can achieve synergistic effect on the herbicidal effect of Amaranthus retroflexus.

[0069] Example 5

[0070] The present embodiment provides the combined effect of herbicide compositions of different ratios on the survival rate of Solanum nigrum. Specifically, the herbicide active ingredients are composed of pendimethalin, promethazine, and saflufenacil. The pendimethalin technical, promethazine technical, and saflufenacil technical are dissolved in acetone and then prepared with a 0.1% surfactant (Tween 80: Span 20 = 2:1) aqueous solution to a required concentration for use. The effects of different ratios on the survival rate of Solanum nigrum and the combined effect are tested. The formula and the results are shown in Table 5.

[0071] Table 5 The survival rate test and combined effect evaluation results of different ratios of herbicidal combinations on Solanum nigrum

[0072]

[0073]

[0074] It can be seen from Table 5 that when the ratio of pendimethalin, promethazine and saflufenacil is 20:9:0.3, 20:9:0.45, 20:9:0.6, 30:13.5:0.3, 30:13.5:0.45, 30:13.5:0.6, 40:18:0.3, 40:18:0.45, 40:18:0.6, the composition under this ratio can achieve synergistic effect on the weeding effect of Solanum nigrum.

[0075] Example 6

[0076] This embodiment provides the combined effect of different ratios of herbicide compositions on the survival rate of Setaria viridis. Specifically, the herbicide active ingredients are composed of pendimethalin, promethazine, and saflufenacil. The pendimethalin technical, promethazine technical, and saflufenacil technical are dissolved in acetone and then prepared with a 0.1% surfactant (Tween 80: Span 20 = 2:1) aqueous solution to a required concentration for use. The effects of different ratios on the survival rate of Setaria viridis and the combined effects are tested. The formula and results are shown in Table 6.

[0077] Table 6 The survival rate test and combined action evaluation results of different ratios of herbicidal compositions on Setaria viridis

[0078]

[0079]

[0080]

[0081] It can be seen from Table 6 that when the ratio of pendimethalin, promethazine and saflufenacil is 20:9:0.3, 20:9:0.45, 20:9:0.6, 30:13.5:0.3, 30:13.5:0.45, 30:13.5:0.6, 40:18:0.3, 40:18:0.45, 40:18:0.6, the composition under this ratio can achieve synergistic effect on the herbicidal effect of Setaria viridis.

[0082] Example 7

[0083] This embodiment provides the combined effect of herbicide compositions with different ratios on the survival rate of goosegrass. Specifically, the herbicide active ingredients are composed of pendimethalin, promethazine, and saflufenacil. The pendimethalin technical, promethazine technical, and saflufenacil technical are dissolved in acetone and then prepared with a 0.1% surfactant (Tween 80: Span 20=2:1) ​​aqueous solution to a required concentration for use. The effects of different ratios on the survival rate of goosegrass are tested and the combined effects are tested. The formula and results are shown in Table 7.

[0084] Table 7 The survival rate test and combined action evaluation results of different ratios of herbicidal combinations on Goosegrass

[0085]

[0086]

[0087] It can be seen from Table 7 that when the ratio of pendimethalin, promethazine and benzylpyrazone is 20:9:0.3, 20:9:0.45, 20:9:0.6, 30:13.5:0.3, 30:13.5:0.45, 30:13.5:0.6, 40:18:0.3, 40:18:0.45, 40:18:0.6, the composition under this ratio can achieve synergistic effect on the weeding effect of Berberis serrata.

[0088] It can be seen from Tables 4 to 7 that when the ratio of pendimethalin, promethazine and benzylpyrazone is 20:9:0.3, 20:9:0.45, 20:9:0.6, 20:9:0.2, 20:9:0.4, 20:9:0.15 and 20:9:0.225, a synergistic effect is exhibited on grass weeds (Amaranthus retroflexus and Solanum nigrum) and broad-leaved weeds (Setaria viridis and Eleocharis oxyphylla).

[0089] Example 8

[0090] This embodiment provides a formulation of a herbicide composition in the form of an emulsifiable concentrate, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0091]

[0092] Example 9

[0093] This example refers to Example 8, and provides a formulation of a herbicide composition in the form of an emulsifiable concentrate, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0094] This embodiment provides a formulation of a herbicide composition in the form of an emulsifiable concentrate, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0095]

[0096] Example 10

[0097] This example refers to Example 8, and provides a formulation of a herbicide composition in the form of an emulsifiable concentrate, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0098] This embodiment provides a formulation of a herbicide composition in the form of an emulsifiable concentrate, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0099]

[0100]

[0101] Embodiment 11

[0102] This embodiment provides a formulation of a herbicide composition in the form of an aqueous emulsion, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0103]

[0104] Example 12

[0105] This embodiment provides a formulation of a herbicide composition in the form of a suspoemulsion, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0106]

[0107] Example 13

[0108] This embodiment provides a formulation of a herbicide composition in the form of a microcapsule suspension-suspension concentrate, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0109]

[0110] Embodiment 14

[0111] This embodiment provides a formulation of a herbicide composition in the form of a dispersible oil suspension, which is specifically composed of the following components in terms of mass percentage of the herbicide:

[0112]

[0113] The weed control effects of the herbicide compositions prepared in Examples 8 to 14 were measured. The results are shown in Table 8.

[0114] Table 8 Weeding effect of the herbicide composition prepared in Examples 8 to 14

[0115]

[0116] It can be seen from the data in Table 10 that the composition ratio of the present invention can be used to prepare conventional pesticide formulations such as emulsifiable concentrate (EC), emulsion in water (EW), suspension concentrate (SC), microcapsule suspension-suspension concentrate (ZC), dispersible oil suspension concentrate (OD), etc., all of which can achieve ideal herbicidal effects.

[0117] Embodiment 15

[0118] In this example, corn, soybean, cotton and peanut were used as test crops, crabgrass and Chenopodium album were used as test target weeds, and the emulsifiable concentrate herbicidal composition of Example 8 was used as a test agent. The selectivity index was measured. The results are shown in Tables 9 and 10.

[0119] Table 9 Determination results of the selectivity index of the herbicide combination for the test crops and Chenopodium album

[0120]

[0121] Table 10 Determination results of the selectivity index of the herbicide combination for the test crops and crabgrass

[0122]

[0123] The results in Table 9 show that the selectivity index I of 29.4% pendimethalin·prometryn·safensulfuron EC between the test crops corn, soybean, cotton and peanut and the weed Chenopodium album are 7.1, 7.98, 6.25 and 7.17, respectively, indicating that the composition of Example 8 has excellent selectivity between the test crops and the broad-leaved weed Chenopodium album.

[0124] The results in Table 10 show that the selectivity index I of 29.4% pendimethalin·promethazine·safensulfuron emulsifiable concentrate between the test crops corn, soybean, cotton and peanut and the weed crabgrass is 7.2, 8.09, 6.03 and 7.27, respectively, indicating that the composition of Example 8 has excellent selectivity between the test crops and the grass weed crabgrass.

[0125] Comparative Example 1

[0126] This comparative study is used to explore the effects of different herbicide compound ratios on weed survival rate (herbicidal effect) and crop safety. Specifically:

[0127] The dosage concentration and ratio of the herbicides pendimethalin, promethazine and saflufenacil were adjusted as follows:

[0128] A1: Pendimethalin: Promethazine: Safensulfuron = 20:27:1.8

[0129] B1: Pendimethalin: Promethazine: Safensulfuron = 20:27:1.5

[0130] C1: Pendimethalin: Promethazine: Safensulfuron = 20:27:1.2

[0131] After each group of original drugs was dissolved by acetone, it was prepared into a test solution with a 0.1% surfactant (Tween 80: Span 20 = 2:1) aqueous solution. The active ingredients of each group were mixed according to the ratio of A1, B1, and C1. The dosage concentrations were 732g ai / ha (300a.i / ha+405a.i / ha+27a.i / ha), 727.5g ai / ha (300a.i / ha+405a.i / ha+22.5ai / ha), and 723g ai / ha (300a.i / ha+405a.i / ha+18a.i / ha), respectively. The results are shown in Tables 11 and 12.

[0132] Table 11 Effect of different herbicide compound ratios on weed survival rate (herbicidal effect)

[0133]

[0134] It can be seen from Table 11 that the herbicidal composition exceeding the ratio range of the present application may produce antagonistic effects, thereby reducing the herbicidal effect of the original single active ingredient.

[0135] Table 12 Effects of different herbicide compound ratios on crop safety

[0136]

[0137] As can be seen from Table 12, the plant height inhibition rates of A1, B1, and C1 on corn, soybean, cotton, and peanut decreased in turn, and the plant height inhibition rates were higher than those in Example 8, especially the plant height inhibition rates of A1 group on cotton and peanut were >10%, exceeding the acceptable safety requirements in pesticide science. This shows that the ratio of the composition not only affects the weed control effect, but also has a significant impact on the safety of the crops.

[0138] In summary, the present invention is the first to scientifically combine the ultra-high-efficiency herbicide safensulfuron with pendimethalin and promethazine. This innovative combination not only achieves complementary advantages between the herbicides, but also significantly enhances the weed control effect and shows a significant synergistic effect. At the same time, the composition has a long lasting effect, which can effectively reduce the frequency of repeated application of pesticides, reduce the cost of use, and improve the efficiency of farmland management.

[0139] The herbicide combination of the present invention shows an extremely excellent control effect on common malignant weeds in the field, such as broad-leaved weeds such as Solanum nigrum and Chenopodium album. This characteristic effectively makes up for the problems of insufficient control effect and limited scope of application when a single herbicide is used, and provides a more comprehensive and efficient weed management solution.

[0140] The herbicide combination of the present invention is highly safe for important crops such as corn, cotton, soybeans, and peanuts, and will not harm crops even in a composite planting mode. This feature has opened up a new chapter in the application of the herbicide combination in composite planting systems such as corn-soybean, corn-peanut, and corn-cotton, successfully solving the long-standing problem of lack of suitable herbicide selection in composite planting modes, and providing strong support for promoting the sustainable development of modern agriculture.

[0141] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A herbicide composition, characterized in that: The herbicide composition comprises 29.15 to 59.2% of the herbicide active ingredient by mass percentage, and the remainder is an adjuvant acceptable in pesticides; The active ingredients of the herbicide are pendimethalin, promethazine and saflufenacil.

2. The herbicide composition according to claim 1, characterized in that: The herbicide composition comprises, in percentage by mass, 20% to 40% of pendimethalin, 9% to 18% of promethazine, and 0.15% to 1.2% of saflufenacil.

3. The herbicide composition according to claim 2, characterized in that: The mass ratio of pendimethalin, promethazine and saflufenacil is 20:9:0.15-0.

6.

4. The herbicide composition according to claim 3, characterized in that: The mass ratio of pendimethalin, promethazine and saflufenacil is 20:9:0.15-0.225 or 20:9:0.3-0.

6.

5. The herbicide composition according to claim 1, characterized in that: The pesticide-acceptable adjuvants include pesticide-acceptable surfactants and pesticide-acceptable carriers.

6. The herbicide composition according to claim 1, characterized in that: The dosage form of the herbicide composition includes one of a suspension concentrate, a suspoemulsion, a microcapsule suspension-suspension concentrate, an aqueous emulsion, a dispersible oil suspension, and an emulsifiable concentrate.

7. The use of the herbicide composition according to any one of claims 1 to 6, characterized in that: The herbicide composition is used for preventing and controlling broadleaf and grass weeds.

8. The use of the herbicide composition according to claim 7, characterized in that: The herbicide composition is used for controlling weeds in a single crop planting or composite cropping cultivation mode.

9. The use of the herbicide composition according to claim 8, characterized in that: The single crop planting includes one of corn, cotton, soybean, and peanut, and the composite planting cultivation includes one or more of corn-soybean, corn-cotton, and corn-peanut.

10. The use of the herbicide composition according to claim 7, characterized in that: The herbicide composition is applied at a dosage of 437.25 ga.i / ha to 1776 ga.i / h.

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