Herbicidal composition, herbicide and use thereof

Abstract

The application discloses a kind of herbicide composition, herbicide and application, it is related to flower planting technical field.The active ingredient of the composition includes chlorofluoropyridine oxalic acid, dichloropyridine acid, high-efficiency fluazifop-butyl, the mass ratio of chlorofluoropyridine oxalic acid, dichloropyridine acid, high-efficiency fluazifop-butyl is (16.2~22.6): (33.3~50): (100~133.3).The application also provides the application of the herbicide composition or herbicide to companion weed in small leaf rosemary seedling stage.The herbicide provided by the application is especially suitable for rosemary seedling stage weed control, can not only efficiently remove companion weed in rosemary seedling field, but also ensure drug safety, and environmental pollution is less, can be widely applied, has strong superiority.

Description

Technical Field

[0001] This invention relates to the field of flower cultivation technology, specifically to a weed control composition, herbicide, and its application. Background Technology

[0002] Rosemary is not tolerant of waterlogging; seedlings will turn yellow and lose leaves during months with excessive rainfall. It has poor cold resistance; in cold regions of northern China, the roots should be covered with soil to protect them during winter. It likes sunlight but can also grow in partial shade; indoor windowsills are the best place to place rosemary.

[0003] Rosemary is a prized natural aromatic plant that emits a pleasant fragrance during its growing season. The aromatic oil extracted from its flowers and young branches can be used to formulate air fresheners, perfumes, soaps, and other cosmetic ingredients. Folk wisdom suggests that rosemary leaves have carminative, antispasmodic, choleretic, and menstrual-regulating effects; Traditional Chinese medicine believes that rosemary has diaphoretic, spleen-strengthening, calming, and analgesic properties.

[0004] However, the occurrence of associated weeds is quite serious. As intermediate hosts for pests and diseases, weeds also compete with rosemary for water, fertilizer and light, which seriously affects the quality of rosemary leaves.

[0005] Currently, weed control for rosemary is primarily done manually, but this is difficult, time-consuming, labor-intensive, and increases production costs. If chemical herbicides are used, there is a lack of systematic safety and efficacy evaluation trials. The inventors of this invention have learned that currently, rosemary producers and growers only use targeted spraying of non-selective herbicides, such as glufosinate.

[0006] After nearly five years of research in rosemary producing areas in Hunan Province, including Yuhu District, Xiangtan, Xiangyin, and Yueyang, the inventors of this invention found that weed problems increase production costs by approximately 300 yuan per mu annually. Furthermore, through long-term observation, the inventors discovered four main problems with current rosemary herbicides: 1. Inaccurate dosage or improper compounding severely inhibits rosemary growth; 2. Inaccurate dosage or improper mixing causes phytotoxicity; 3. Human-caused soil and environmental pollution; 4. Accelerates the development of herbicide resistance in weeds.

[0007] In conclusion, the safe and efficient use of herbicides in rosemary fields has become a critical issue that urgently needs to be addressed in its production, and the safety of herbicides is the primary concern among the four aspects mentioned above. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a safe herbicidal composition, herbicide, and its application. It effectively removes weeds from rosemary fields while reducing herbicide damage during the rosemary seedling stage and saving on herbicide costs.

[0009] To achieve the above object, the present application adopts the following technical solutions:

[0010] In the first aspect, the present application provides a herbicide composition, the active ingredients of which include fluroxypyr, clopyralid and haloxyfop-R-methyl, and one or more combinations of the above.

[0011] Further, the active ingredients of the composition are combinations of fluroxypyr, clopyralid and haloxyfop-R-methyl.

[0012] Further, the mass ratio of fluroxypyr, clopyralid and haloxyfop-R-methyl is (16.2~22.6):(33.3~50):(100~133.3).

[0013] In the second aspect, the present application provides a herbicide, which comprises the herbicide composition and pharmaceutically acceptable adjuvants, and the adjuvants include at least one of wetting agents, dispersants, thickeners, organic solvents, antifreezes, antifoaming agents, water and preservatives.

[0014] Further, 32.4-43.2g of fluroxypyr, 66.6-100g of clopyralid and 200-266.6g of haloxyfop-R-methyl are contained in 100L of the herbicide, and the rest is adjuvants.

[0015] In the third aspect, the present application provides a preparation method of the herbicide, which comprises taking a container, adding clean water into the container, then adding fluroxypyr, haloxyfop-R-methyl, clopyralid and adjuvants, mixing uniformly, then adding clean water to constant volume, mixing uniformly, and obtaining the herbicide.

[0016] In the fourth aspect, the present application provides the application of the above herbicide composition or herbicide to companion weeds in the seedling stage of Rosmarinus officinalis.

[0017] Further, the herbicide composition or the herbicide is applied before the flowering period of Rosmarinus officinalis seedlings after the seedlings are planted and survive, and the height of the seedlings reaches more than 30cm.

[0018] Further, the application amount of the active ingredients of the herbicide composition or the herbicide is 0.01944-0.03888 g / m 2 , 0.03996-0.09 g / m 2 , and 0.012-0.23994 g / m 2 .

[0019] Further, the application conditions of the herbicidal composition or herbicide are: temperature 15-25℃, air relative humidity 65% or more, wind speed <3m / s, and application before 10am or after 4pm.

[0020] The beneficial effects of the present application are:

[0021] The active ingredients of the herbicidal composition of the present application are fluroxypyr, clopyralid and haloxyfop-R-methyl, which are used in combination to show additive and synergistic effects. The combination has high safety to Rosmarinus officinalis seedlings and can effectively control monocotyledonous weeds and broadleaf weeds in Rosmarinus officinalis fields, and has less environmental pollution and can be widely applied. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 Figure 1 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 1 of Example 1.

[0023] Figure 2 Figure 2 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 2 of Example 1.

[0024] Figure 3 Figure 3 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 3 of Example 1.

[0025] Figure 4 Figure 4 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 4 of Example 1.

[0026] Figure 5 Figure 5 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 5 of Example 1.

[0027] Figure 6 Figure 6 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 6 of Example 1.

[0028] Figure 7 Figure 7 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 7 of Example 1.

[0029] Figure 8 Figure 8 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 8 of Example 1.

[0030] Figure 9 Figure 9 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 9 of Example 1.

[0031] Figure 10 Figure 10 shows the growth of Rosmarinus officinalis after 7, 15 and 60 days of spraying in test group 10 of Example 1.

[0032] Figure 11The rosemary growth chart of the test group 11 in the effect example 1 after spraying for 7, 15 and 60 days.

[0033] Figure 12 The rosemary growth chart of the test group 12 in the effect example 1 after spraying for 7, 15 and 60 days.

[0034] Figure 13 The rosemary growth chart of the test group 13 in the effect example 1 after spraying for 7, 15 and 60 days.

[0035] Figure 14 The cypress growth chart after spraying for 60 days in the effect example 2.

[0036] Figure 15 The centaurea growth chart after spraying for 60 days in the effect example 2.

[0037] Figure 16 The sunflower growth chart after spraying for 60 days in the effect example 2.

[0038] Figure 17 The paeony growth chart after spraying for 60 days in the effect example 2.

[0039] Figure 18 The thousand-day red growth chart after spraying for 60 days in the effect example 2. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present application will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, but not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0041] In order to facilitate the preparation of the herbicide provided by the present application, the pesticide formulations containing the active ingredients used in the following specific embodiments are all purchased by commercial channels, and all types of pesticide formulations can be inquired through the China Pesticide Information Network. The specific embodiments are as follows:

[0042] The pesticide name is fluroxypyr, the registration number is PD20080447, the dosage form is emulsifiable concentrate, the active ingredient is fluroxypyr, and the content of the active ingredient is 200g / L.

[0043] The pesticide name is fluazifop-P-butyl, the registration number is PD20101498, the dosage form is emulsifiable concentrate, the active ingredient is fluazifop-P-butyl, and the content of the active ingredient is 108g / L.

[0044] The pesticide name is clopyralid, the dosage form is aqueous solution, the active ingredient is clopyralid, and the content of the active ingredient is 30%.

[0045] The application discloses a safe weeding composition, a weeding agent and application.

[0046] In a first aspect, the application provides a weeding composition, wherein the active ingredients of the composition comprise a combination of fluroxypyr, clopyralid and haloxyfop-methyl.

[0047] In some embodiments of the application, the active ingredients of the composition are a combination of fluroxypyr, clopyralid and haloxyfop-methyl.

[0048] In some embodiments of the application, the mass ratio of fluroxypyr, clopyralid and haloxyfop-methyl is (16.2-22.6):(33.3-50):(100-133.3).

[0049] In some embodiments of the application, the fluroxypyr is a commercially available emulsifiable concentrate, the haloxyfop-methyl is a commercially available emulsifiable concentrate, and the clopyralid is a commercially available water-soluble agent, which are all selected from conventional choices in the art. It should be noted that as long as the active ingredients satisfy the mass ratio as described in the application, the technical effects of the application can be achieved regardless of the dosage form of the composition.

[0050] In a second aspect, the application provides a weeding agent, which comprises the weeding composition and a pharmaceutically acceptable adjuvant, wherein the adjuvant comprises at least one of wetting agents, dispersing agents, thickening agents, organic solvents, antifreezing agents, antifoaming agents, water and preservatives.

[0051] The weeding agent of the application can be in a conventional form in the art, such as a solid preparation (e.g. granules) or a liquid preparation (e.g. wettable powder, emulsion in water or emulsifiable concentrate).

[0052] In some embodiments of the application, 32.4-43.2 g of fluroxypyr, 66.6-100 g of clopyralid and 200-266.6 g of haloxyfop-methyl are contained in 100 L of the weeding agent, and the rest is the adjuvant.

[0053] In a preferred embodiment of the application, 32.4 g of fluroxypyr, 100 g of clopyralid and 200 g of haloxyfop-methyl are contained in 100 L of the weeding agent, and the rest is water.

[0054] In a preferred embodiment of the application, 40 g of fluroxypyr, 80 g of clopyralid and 240 g of haloxyfop-methyl are contained in 100 L of the weeding agent.

[0055] In a third aspect, the present application provides a preparation method of the herbicide, which comprises the following steps: taking a container, adding clean water into the container, then adding fluroxypyr, haloxyfop-R-methyl and clopyralid, mixing uniformly, then adding clean water to constant volume, mixing uniformly, and obtaining the herbicide.

[0056] The container is a beaker, a medicine bucket or any other container capable of containing the herbicide.

[0057] In a fourth aspect, the present application provides the application of the herbicide composition or the herbicide to companion weeds in the seedling stage of Rosmarinus officinalis.

[0058] In some embodiments of the present application, the herbicide composition or the herbicide is applied before the seedlings of Rosmarinus officinalis grow to a height of more than 30 cm and before the flowering period.

[0059] In some embodiments of the present application, the application amount of the effective components of the herbicide composition or the herbicide is 0.01944-0.03888 g / m 2 2 of fluroxypyr, 0.03996-0.09 g / m 2 2 of clopyralid, and 0.012-0.23994 g / m 2 2 of haloxyfop-R-methyl.

[0060] In some embodiments of the present application, 100 L of the herbicide contains 32.4-43.2 g of fluroxypyr, 66.6-100 g of clopyralid, and 200-266.6 g of haloxyfop-R-methyl, and the rest is water.

[0061] In some embodiments of the present application, the application dose of the herbicide is 60-90 mL per square meter.

[0062] In some embodiments of the present application, the application conditions of the herbicide composition or the herbicide are as follows: the temperature is 15-25℃, the relative humidity of air is more than 65%, the wind speed is less than 3 m / s, and the application is performed before 10 o'clock in the morning or after 4 o'clock in the afternoon.

[0063] In some embodiments of the present application, the application mode of the herbicide composition or the herbicide includes any one of the following modes: whole field stem and leaf spraying, directional spraying, directional smearing, airplane application, and mechanical spraying.

[0064] The present application discloses that the herbicide obtained by mixing fluroxypyr, clopyralid and haloxyfop-R-methyl according to the use dose has high safety in the seedling stage of Rosmarinus officinalis and good prevention and control effect on monocotyledonous weeds and broad-leaved weeds. The herbicide provided by the present application can bring direct economic benefits to Rosmarinus officinalis planters, and the labor cost for weeding is saved by about 400 yuan per mu per year.

[0065] The above is a detailed description of the present application, and the following is an embodiment of the present application.

[0066] Formulation of foliar rosmarinus seedling herbicide

[0067] Example 1

[0068] Take 100L medicine bucket, add clean water to the medicine bucket, then add fluroxypyr, flumioxazin, clopyralid, adjuvant, mix evenly, then add clean water to constant volume, mix evenly, get 100L herbicide 1, containing fluroxypyr 32.4g, clopyralid 66.6g, flumioxazin 200g, the rest is water.

[0069] Example 2

[0070] Take 100L medicine bucket, add clean water to the medicine bucket, then add fluroxypyr, flumioxazin, clopyralid, adjuvant, mix evenly, then add clean water to constant volume, mix evenly, get 100L herbicide 2, containing fluroxypyr 40g, clopyralid 80g, flumioxazin 240g, the rest is water.

[0071] Example 3

[0072] Take 100L medicine bucket, add clean water to the medicine bucket, then add fluroxypyr, flumioxazin, clopyralid, adjuvant, mix evenly, then add clean water to constant volume, mix evenly, get 100L herbicide 3, containing fluroxypyr 43.2g, clopyralid 100g, flumioxazin 266.6g, the rest is water.

[0073] Example 4

[0074] Take 100L medicine bucket, add clean water to the medicine bucket, then add fluroxypyr, adjuvant, mix evenly, then add clean water to constant volume, mix evenly, get 100L herbicide 4, containing fluroxypyr 32.4g, the rest is water.

[0075] Example 5

[0076] Take 100L medicine bucket, add clean water to the medicine bucket, then add flumioxazin, adjuvant, mix evenly, then add clean water to constant volume, mix evenly, get 100L herbicide 5, containing flumioxazin 200g, the rest is water.

[0077] Example 6

[0078] Take 100L medicine bucket, add clean water to the medicine bucket, then add clopyralid, adjuvant, mix evenly, then add clean water to constant volume, mix evenly, get 100L herbicide 6, containing clopyralid 66.6g, the rest is water.

[0079] Example 7

[0080] Take 100L medicine bucket, add clean water to the medicine bucket, then add fluroxypyr, clopyralid, adjuvant, mix uniformly, then add clean water to constant volume, mix uniformly, get 100L herbicide 7, containing fluroxypyr 32.4g, clopyralid 66.6g, the rest is water.

[0081] Example 8

[0082] Take 100L medicine bucket, add clean water to the medicine bucket, then add fluroxypyr, haloxyfop-R-methyl, adjuvant, mix uniformly, then add clean water to constant volume, mix uniformly, get 100L herbicide 8, containing fluroxypyr 32.4g, haloxyfop-R-methyl 200g, the rest is water.

[0083] Example 9

[0084] Take 100L medicine bucket, add clean water to the medicine bucket, then add haloxyfop-R-methyl, clopyralid, adjuvant, mix uniformly, then add clean water to constant volume, mix uniformly, get 100L herbicide 9, containing clopyralid 66.6g, haloxyfop-R-methyl 200g, the rest is water.

[0085] Example 10

[0086] Take 100L medicine bucket, add clean water to the medicine bucket, then add fluroxypyr, haloxyfop-R-methyl, clopyralid, adjuvant, mix uniformly, then add clean water to constant volume, mix uniformly, get 100L herbicide 10, containing fluroxypyr 30g, clopyralid 50g, haloxyfop-R-methyl 100g, the rest is water.

[0087] Example 11

[0088] Take 100L medicine bucket, add clean water to the medicine bucket, then add fluroxypyr, haloxyfop-R-methyl, clopyralid, adjuvant, mix uniformly, then add clean water to constant volume, mix uniformly, get 100L herbicide 11, containing fluroxypyr 45g, clopyralid 102g, haloxyfop-R-methyl 268g, the rest is water.

[0089] Example 1-11 prepared herbicide on rosemary seedling stage weed control effect verification

[0090] 1.1 Test purpose: test the herbicidal effect of the herbicides prepared by the examples 1-11 of the application on rosemary seedling stage.

[0091] 1.2 Test method:

[0092] In the rosemary field (variety: small leaf), 11 plots with an area of 24 square meters were randomly selected for field plot efficacy test, the test field was 3 rows, the ridge length was 10 meters, and the ridge width was 0.8 meters. 20 days after the small leaf rosemary was planted and survived, when the plant height was more than 30 cm, artificial backpack sprayer (Ibe intelligent equipment backpack electric sprayer, model 3WBD-20, drug tank volume 20 liters) was used for spraying, and the spraying method was as follows:

[0093] 1. The distance between the nozzle and the ground was 30-40 cm, the nozzle spray fan and the spray rod formed a 30-degree angle, and the artificial backward spraying was used.

[0094] 2. The pressure of the sprayer was 2-3 kg / cm2, the walking speed of the person was 3 km / h, not less than 2.8 km / h, and not more than 3.5 km / h.

[0095] The spraying conditions were temperature 15-25℃, air relative humidity 65%, and wind speed below 3 m / s.

[0096] The spraying dose was 60-90 mL / square meter.

[0097] A clear water control group and a manual weeding group were also set up, the clear water control group was sprayed with the same volume of clear water in the test field, and the manual weeding group was manually weeded by the flower farmer according to the conventional operation.

[0098] The first spraying time was May 21, 2022, and the plant height growth (mm), weed plant number (plants / m 2 ), and phytotoxicity index in the test area were investigated 7 days, 15 days, and 60 days after spraying, respectively.

[0099] Data statistical method: multiple sampling points were taken in each test area, the area of each sampling point was 1 square meter, the plant height data, weed plant number, and phytotoxicity index in each sampling point were counted, the average value was calculated, and the average value was divided by the number of sampling points to obtain the weeding effect data.

[0100] Plant height growth = plant height in sampling period-plant height in initial spraying period

[0101] Phytotoxicity index judgment standard:

[0102] Table 1 Phytotoxicity index judgment standard

[0103]

[0104] The picture of weeding effect is shown in Figures 1-13 .

[0105] Figure 1 The growth chart of rosemary in effect example 1 after spraying of test group 1 for 7 days, 15 days, and 60 days.

[0106] Figure 2 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 2 of Example 1.

[0107] Figure 3 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 3 of Example 1.

[0108] Figure 4 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 4 of Example 1.

[0109] Figure 5 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 5 of Example 1.

[0110] Figure 6 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 6 of Example 1.

[0111] Figure 7 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 7 of Example 1.

[0112] Figure 8 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 8 of Example 1.

[0113] Figure 9 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 9 of Example 1.

[0114] Figure 10 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 10 of Example 1.

[0115] Figure 11 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 11 of Example 1.

[0116] Figure 12 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 12 of Example 1.

[0117] Figure 13 Figure 1. Rosmarinus officinalis growth chart 7, 15, 60 days after spraying in test group 13 of Example 1.

[0118] The test statistical results are shown in the following table:

[0119] Table 2. Herbicide effect verification on Rosmarinus officinalis seedling stage

[0120]

[0121] The phytotoxicity index of the 13 test fields is 0, indicating that whether using fluroxypyr, high-efficiency haloxyfop, or dichloropyridine acid single agent or the herbicide provided by the application formed by compounding, there is no phytotoxicity to rosemary at the seedling stage, indicating that the herbicide provided by the application is good in safety.

[0122] In addition, as can be seen from the above data, if weeds are not prevented in production, such as the water control group in test group 12, weeds will compete with plants for water, fertilizer and light, thereby inhibiting the growth of rosemary seedlings, which is manifested in small plants and slow growth.

[0123] While fluroxypyr, high-efficiency haloxyfop, and dichloropyridine acid are compounded in a certain proportion, the plant height of rosemary in test group 1, test group 2, and test group 3 using fluroxypyr, high-efficiency haloxyfop, and dichloropyridine acid single agent is higher, and the number of weed plants is less.

[0124] Among them, the herbicide 2 of example 2 used in test group 2 has the best effect. This scheme completely kills weeds 15 days after use, and has contact, systemic and blocking effects, and starts to work 7 days after use and lasts until the later leaf picking period, with basically no weed damage during the period.

[0125] The herbicide 3 of example 3 in test group 3 also has good weed control effect, but its effect on plant height growth is weaker than that of test group 2. In combination with test group 11, the herbicide used exceeds the limited range value, and its effect on plant height growth is weaker and its plant height inhibition effect is stronger, which indicates that exceeding the range value of the present case will inhibit the growth of rosemary, which is not desirable.

[0126] While test example 10 uses three components compounded, the use amount of the three components is lower than the limited range value, and has a certain weed control effect, but the effect is worse than that of test groups 1-3, also worse than that of test groups 4, 5, and 6 which add one single agent, and also worse than that of test groups 7, 8, and 9 which add two single agents. It is indicated that below the limited range value of the present case, both the weed control effect and the effect of increasing plant height are not good.

[0127] Test group 4, test group 5, and test group 6 only add one single agent herbicide, which has a certain weed control effect, but the effect is not good.

[0128] Test group 7, test group 8, and test group 9 only add two single agent herbicides, which have a weed control effect, and the effect is better than that of test group 4, test group 5, and test group 6, but not as good as that of test group 1 and test group 2.

[0129] The test group 10 also adds three components, fluroxypyr, haloxyfop-R-methyl and clopyralid, but the amount of addition is outside the limited range, the amount is low, and the weeding effect is not good, even worse than adding only one single agent or adding two single agents.

[0130] It can be seen that the three components of the present application can have a synergistic effect.

[0131] And the weeding effect of the herbicide provided by the present application is better than that of manual weeding, significantly saving the production cost and labor cost of rosemary growers, and achieving superior results.

[0132] Effect example 2: verification of the weeding effect of the herbicide on other types of fresh flowers

[0133] Test purpose: test the weeding effect of the herbicide 1 prepared in example 2 of the present application on boxwood, zinnia, sunflower, peony and thousand-day red.

[0134] Test method:

[0135] Select the planting areas of boxwood, zinnia, sunflower, peony and thousand-day red for field plot efficacy test, respectively, and spray the plants at the seedling stage with a manual backpack sprayer (Ibe intelligent equipment backpack electric sprayer, model 3WBD-20, tank volume 20 liters). The spraying method is as follows:

[0136] 1. The distance between the nozzle and the spray rod is 30-40 cm, the nozzle spray fan and the spray rod form a 30-degree angle, and the spraying is done by manually retreating.

[0137] 2. The pressure of the sprayer is 2-3 kg / cm2, the walking speed is 3 km / h, not less than 2.8 km / h, and not more than 3.5 km / h.

[0138] Spraying conditions: temperature 15-25℃, air relative humidity 65%, wind speed below 3 m / s.

[0139] Spraying dose: 60-90 mL / m2.

[0140] At the same time, set up a water control group, which sprays the same volume of water into the test field, and the other operations are the same as the test group.

[0141] The first spraying time is May 23, 2022, and the weed plant number (plants / m 2 ) and phytotoxicity index in the test area are investigated 60 days after spraying, and the data statistics method is the same as that of effect example 1.

[0142] The plant picture 60 days after spraying is shown in Figures 14-18 .

[0143] Table 3: verification of the effect of the herbicide on other kinds of fresh flowers

[0144]

[0145] Note: the number of weeds in the above table is in units of: plants / m 2 .

[0146] From the data in the above table, it can be seen that the application of the herbicide provided by the present application for weeding of boxwood, centaurea, sunflower, peony, and thousand-day red, the number of weeds on the above plants has decreased significantly 60 days after spraying, but different degrees of phytotoxicity have occurred.

[0147] According to Figures 14-18 It can be seen that boxwood, centaurea, sunflower, peony, and thousand-day red all have leaf yellowing, blackening, and even wilting.

[0148] Therefore, compared with the weeding effect of other kinds of fresh flower fields, the herbicide provided by the present application is especially suitable for rosemary field weeding, which can ensure that there is no phytotoxicity in addition to efficient weeding.

[0149] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit it; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A herbicidal composition, characterized by, The active ingredient of the composition is a combination of fluroxypyr, clopyralid and flumeturon; the mass ratio of fluroxypyr, clopyralid and flumeturon is (16.2-22.6):(33.3-50):(100-133.3).

2. A herbicide, characterized by comprising, The herbicidal composition as claimed in claim 1 and pharmaceutically acceptable adjuvants, including at least one of wetting agents, dispersants, thickeners, organic solvents, antifreezes, antifoaming agents, water and preservatives.

3. The herbicide according to claim 2, characterized in that, 32.4-43.2g fluroxypyr, 66.6-100g clopyralid, 200-266.6g flumeturon are contained in 100L herbicide, and the rest is adjuvant.

4. A method of preparing the herbicide according to any one of claims 2 to 3, characterized in that, Take a container, add clean water to the container, then add fluroxypyr, clopyralid and flumeturon, mix well, then add clean water to constant volume, mix well, to obtain the herbicide.

5. The herbicidal composition of claim 1 or the herbicide of any one of claims 2-3 for use in controlling companion weeds at the seedling stage of Rosmarinus officinalis.

6. Use according to claim 5, characterized in that, The herbicidal composition or the herbicide is applied before the flowering stage of Rosmarinus officinalis after the seedling is planted and survives, and the height of the plant reaches more than 30cm.

7. Use according to claim 5, characterized in that, The effective ingredient of the herbicide composition or herbicide is applied at a rate of 0.01944~0.03888 g / m³ of clopyralid. 2 dichloropyridine acid 0.03996~0.09 g / m 2 High-efficiency flupyradifurone 0.012~0.23994 g / m³ 2 .

8. Use according to claim 5, characterized in that, The application conditions of the herbicidal composition or the herbicide are: temperature 15-25℃, air relative humidity more than 65%, wind speed less than 3m / s, and the application is performed before 10am or after 4pm.

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