Pharmaceutical composition for chemically controlling broadleaf weeds in artificial grassland and application of pharmaceutical composition

Abstract

The invention relates to a pharmaceutical composition for chemically controlling broadleaf weeds in artificial grassland and application thereof, in particular to a method for controlling broadleaf weeds in artificial grassland by compounding sulfonylurea herbicides with picolinic acid herbicides. Belongs to the technical field of chemical weeding. The scheme is very safe to all stages of perennial gramineous forage grass planted in an artificial meadow, can effectively kill annual broadleaf weeds and part of perennial broadleaf weeds, and has a very strong inhibition effect on part of perennial weeds which are difficult to control. The method can effectively improve the competitive advantage of gramineous pasture, expand the ecological occupation of the gramineous pasture, establish an excellent artificial pasture, greatly improve the yield and quality of the pasture, and prolong the utilization period of the pasture.

Description

Technical Field

[0001] The invention relates to the technical field of pesticides, in particular to a drug combination for chemically controlling broadleaf weeds in artificial grass grasslands, in particular to a weed control composition whose active ingredients are sulfonylurea herbicides and pyridinecarboxylic acid herbicides. Background Art

[0002] At present, my country has a very rich system of artificial grassland construction, among which grasslands planted with perennial grasses account for a large proportion and occupy a very important position in my country's animal husbandry.

[0003] Perennial grass pastures are seriously damaged by broadleaf weeds in the early stages of establishment: they compete with grass seedlings for water, nutrients, light and other resources, severely inhibiting the growth of seedlings and causing a significant drop in the overwintering rate of grass seedlings. After the pasture is established, broadleaf weeds reduce the yield of beneficial organisms in the entire artificial pasture, deteriorate its quality and shorten its useful life. Therefore, chemical control of broadleaf weeds in perennial grass pastures is very important.

[0004] Bensulfuron-methyl belongs to the sulfonylurea herbicide, and its mechanism is a selective systemic herbicide. It can be absorbed by the roots and leaves of weeds and conducted in the plant. It inhibits the activity of acetolactate synthase (ALS), thereby affecting the biosynthesis of branched-chain amino acids (such as leucine, isoleucine, valine, etc.). It is mainly used to control various annual broad-leaved weeds. It has a good effect on Artemisia selengensis, Shepherd's purse, Cardamine, Atractylodes macrocephala, Chenopodium album, Amaranthus retroflexus, etc. It also has a certain control effect on Kochia scoparia, Chickweed, Polygonum aviculare, and Glechoma longituba. It has no significant effect on Thistle, Polygonum aviculare, Bindweed, and Lacquer, etc. It is highly safe for perennial grasses.

[0005] Thifensulfuron-methyl belongs to the sulfonylurea herbicide, a systemic post-emergence selective herbicide, and is a branched-chain amino acid synthesis inhibitor that can inhibit the biosynthesis of valine, leucine, and isoleucine, prevent cell division, and stop the growth of sensitive crops. It is mainly used to control broad-leaved weeds in the fields of cereal crops such as wheat, barley, oats, and corn, such as Amaranthus retroflexus, Purslane, Artemisia selengensis, Shepherd's purse, Salsola, Glechoma longituba, Veronica oleracea, and Chickweed. It is ineffective against Echinochloa crusgalli, Bindweed, and grasses, and is highly safe for perennial grasses.

[0006] Amlopyralid belongs to the pyridine carboxylic acid herbicide, a hormone-type herbicide. It can be absorbed and conducted by plant leaves, roots and stems. It can quickly conduct to the growth point, causing deformity, withering, defoliation, necrosis of the upper part of the plant, blockage and discoloration of the xylem vessels, and eventually death. The mechanism of action is to inhibit mitochondrial system respiration and nucleic acid metabolism. Most grass plants are resistant, and most dicotyledonous crops (except Cruciferae), weeds, and shrubs are sensitive. It can prevent and control most dicotyledonous weeds and shrubs. It has outstanding effects on root weeds such as: prickly lettuce, bindweed, etc. It has poor effects on Cruciferae weeds. It is highly safe for perennial grass forage.

[0007] Clopyralid belongs to the pyridine carboxylic acid herbicide, a hormone-type herbicide. It is mainly absorbed by stems and leaves, conducted through phloem and xylem, and accumulated at the growth point. It causes plants to produce excessive RNA, promote excessive differentiation of meristems, abnormal growth of roots, stems and leaves, excessive consumption of nutrients, and obstruction of vascular conduction, causing death. It has a good effect on Asteraceae weeds and Leguminosae weeds, but is ineffective against some Cruciferae and Lamiaceae plants. It is highly safe for perennial Gramineae forage.

[0008] The above-mentioned sulfonylurea herbicides and pyridinecarboxylic acid herbicides are used in combination, which is highly safe to perennial grasses and effectively expands the weed control spectrum. Summary of the invention

[0009] In order to solve the problem of chemical control of broadleaf weeds in artificial grass grassland, the technical method of the present invention is provided. According to claim 1, the artificial grass grassland is characterized in that the artificially established perennial grass grassland includes sheep grass, wheat grass, thin wheat grass, lycopodiella, cattail grass, etc. The sulfonylurea herbicide is compounded with pyridine carboxylic acid herbicide, characterized in that the mass ratio of the sulfonylurea herbicide to the pyridine carboxylic acid herbicide is 10:1 to 1:10, and the optimal mass ratio is 1:2 to 2:1.

[0010] The artificially established perennial grass grassland used in the present invention includes, but is not limited to, perennial artificial grasslands such as Leymus chinensis, Agropyron ovata, Elymus tinctorius, and Timothy tatarinowii.

[0011] In the livestock production system, artificial grassland built with perennial grasses such as sheep fescue, wheat grass, thin wheat grass, alkali grass and cattail grass is used to produce green hay, silage and green fodder for the purpose of providing feed for animal husbandry, and produces products for livestock feed.

[0012] The application period of the present invention refers to the period from the emergence of perennial forage grass to the period of many years after it is necessary to control broadleaf weeds. The combined herbicide of the present invention mainly treats stems and leaves. This combination has a very wide weed control spectrum and good control effect on broadleaf weeds, and is highly safe for perennial grass forage grasses.

[0013] Perennial forage grasses grow slowly in the year of sowing and cannot quickly form a competitive advantage over weeds. Therefore, they are easily harmed by weeds in the year of sowing. Applying this combination according to actual needs during this period can effectively improve the survival rate of seedlings over the winter and cultivate strong seedlings.

[0014] In the few years after the perennial forage grass is established, there will still be perennial broad-leaved weeds that cause harm and compete with them for living space and resources. Therefore, this combination can also be used to control broad-leaved weeds according to actual needs. This combination also has a very wide weed control spectrum and good prevention effect on perennial broad-leaved weeds, and is highly safe for perennial forage grass. Since it is a perennial grassland, there is no need to consider the problem of residual pesticide damage to the subsequent crops, so it is more advantageous.

[0015] The annual broad-leaved weeds and perennial broad-leaved weeds growing in the artificial grassland described in the present invention include annual broad-leaved weeds such as amaranth, Chenopodiaceae weeds, wild rape, chickweed, elsholtzia, mustelid, Polygonum multiflorum, blue violet, scutellaria, shepherd's purse, purslane, etc.; and perennial broad-leaved weeds such as cirsium, thistle, wormwood, dandelion, plantain, potentilla, geranium, wild carrot, etc.

[0016] The sulfonylurea herbicides described in the present invention are bensulfuron-methyl, thifensulfuron-methyl, etc., which can prevent and control broad-leaved weeds and have no harm to gramineous forage. The above-mentioned varieties of sulfonylurea herbicides have low cost, a wide weed control spectrum, outstanding effects, and are highly safe to gramineous forage; pyridinecarboxylic acid herbicides include clopyralid and amiloride.

[0017] The combination of the two has a good synergistic effect, expands the weed control spectrum, improves the control effect, and is highly safe for forage and will not cause toxic effects at any growth stage of the forage.

[0018] The sulfonylurea herbicide compounded with the pyridinic acid herbicide of the present invention is characterized in that the mass ratio of the sulfonylurea herbicide to the pyridinic acid herbicide is 10:1 to 1:10, and optimally 1:2 to 2:1.

[0019] The mass ratio of the sulfonylurea herbicide compounded with the pyridinic acid herbicide to water during specific application is water:herbicide=100-500:1, and the optimal ratio is 200-400:1. DETAILED DESCRIPTION

[0021] The present invention is described in detail below through examples. It is necessary to point out that the following examples are only used to further illustrate the present invention and cannot be understood as limiting the scope of protection of the present invention. Those skilled in the art in this field can make non-essential improvements and adjustments based on the present invention.

[0022] Field efficacy test of compound preparations.

[0023] Field efficacy trial of sulfonylurea and pyridinic acid combination preparations for controlling perennial broad-leaved weeds in artificial grass grassland.

[0024] Sampling and survey methods: Each plot has an area of ​​20m 2 Each treatment was repeated 4 times, and the experimental plots were arranged in random blocks. The survey was conducted 20 days after the application, with 3 points in each plot, and 0.25 m 2 , investigate the fresh weight of weeds, and calculate the fresh weight control effect compared with the control area without any treatment. At the same time, observe the greening, survival, growth and whether there is any pesticide damage of perennial forage grass from time to time after the application of the medicine. The survival rate of forage grass seedlings was investigated after wintering in the artificial grassland sown that year.

[0025] The calculation formulas for fresh weight protection effect and seedling survival rate are as follows: Fresh weight control effect (%) = (fresh weight of weeds in the control area - fresh weight of weeds in the treatment area) / fresh weight of weeds in the control area * 100%; seedling survival rate (%) = (number of plants per square meter before wintering - number of plants per square meter after wintering) / number of plants per square meter before wintering * 100%.

[0026] Embodiment 1: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. In the artificial sheepgrass field planted that year, the sheepgrass seedlings have just emerged from the ground, and there are a large number of broadleaf weeds such as wild rape, Polygonum aviculare, Elsholtzia ciliata, Fructus ferrugoides, Chenopodium album, Trichosanthis, and Echinochloa chinensis in the field; 2. When all the weeds in the artificial grassland emerge, spray the leaves with a mass ratio of 2:1 of bensulfuron-methyl and amlopyralid, and the multiple of 400 times of aqueous solution; 3. After 20 days, the control effect of broadleaf weeds is counted, and after the overwintering forage grass turns green, the survival rate of the sheepgrass seedlings is counted.

[0027] Implementation results: The control effect on broad-leaved weeds such as wild rape, Polygonum aviculare, Elsholtzia ciliata, Mustela, Chenopodium album, Tribolium vulgaris, and Sophora flavescens in the artificial sheepgrass fields sown that year was very good. There was no adverse effect on the sheepgrass seedlings after use, and the survival rate of the sheepgrass seedlings after wintering was greatly improved.

[0028] Embodiment 2: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. In the artificial timothy field planted that year, the timothy seedlings have just emerged from the soil, and there are a large number of broadleaf weeds such as wild rape, Polygonum aviculare, Elsholtzia ciliata, Fructus ferrugoides, Chenopodium album, Trichosanthis, and Echinochloa chinensis in the field; 2. When all the weeds in the artificial grassland emerge, spray the leaves with a mass ratio of 2:1 of bensulfuron-methyl and clopyralid, and the multiple of 400 times of aqueous solution; 3. After 20 days, the control effect of broadleaf weeds is counted, and after the overwintering forage turns green, the survival rate of the timothy seedlings is counted.

[0029] Implementation results: The control effect on broad-leaved weeds such as wild rape, knotweed, Elsholtzia, Mustela, Chenopodium album, Tribolium vulgaris, and Sophora flavescens in the artificial timothy fields sown that year was very good. There was no adverse effect on the timothy seedlings after use, and the survival rate of the seedlings after wintering was greatly improved. deal with Cattail grass seedlings wild rape Polygonum aviculare Elsholtzia Weasel Chenopodium glaucum Tribulus terrestris Amaranth Survival rate (%) Fresh weight protection effect (%) Fresh weight protection effect (%) Fresh weight protection effect (%) Fresh weight protection effect (%) Fresh weight protection effect (%) fresh Fresh weight protection effect (%) Example 2 70 93 90 97 96 92 90 86 Comparison 32 0 0 0 0 0 0 0

[0030] Implementation 3: A drug combination and application for chemical control of broadleaf weeds in artificial grassland. The details are as follows: 1. In the artificial Elymus chinensis field planted that year, Elymus chinensis had just emerged from the ground, and there were a large number of broadleaf weeds in the field, such as wild rape, plantain, Polygonum aviculare, Artemisia, Elsholtzia ciliata, Cirsium sibiricum, Cirsium sibiricum, Chenopodium album, and Endive, etc.; 2. When all the weeds in the artificial grassland emerged, spray the leaves with a mass ratio of 2:1 of thifensulfuron-methyl and amlopyralid, and a multiple of 400 times of aqueous solution; 3. After 20 days, the control effect of broadleaf weeds was counted, and after the overwintering forage grass turned green, the survival rate of Elymus chinensis seedlings was counted.

[0031] Implementation results: The control effect on broad-leaved weeds such as wild rape, Polygonum aviculare, Elsholtzia ciliata, Mustela, Chenopodium album, Tripterygium wilfordii, and Sophora flavescens in the artificial wheatgrass fields sown that year was very good. There was no adverse effect on the wheatgrass seedlings after use, and the survival rate of the seedlings after wintering was greatly improved.

[0032] Embodiment 4: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. In the artificial lycopodiella field planted that year, the lycopodiella seedlings have just emerged from the soil, and there are a large number of broadleaf weeds such as wild rape, Polygonum aviculare, Elsholtzia ciliata, Fructus ferrugoides, Chenopodium album, Trichosanthis, and Echinops oleraceus in the field; 2. When all the weeds in the artificial grassland emerge, spray the leaves with a mass ratio of 2:1 of thifensulfuron-methyl and clopyralid, and a multiple of 400 times of aqueous solution; 3. After 20 days, the control effect of broadleaf weeds is counted, and after the overwintering forage grass turns green, the survival rate of the lycopodiella seedlings is counted.

[0033] Implementation results: It has a good control effect on broad-leaved weeds such as wild rape, Polygonum aviculare, Elsholtzia ciliata, Mustela, Chenopodium album, Tribolium vulgaris, and Sophora flavescens in the artificial alkali grass fields sown that year. There is no adverse effect on cattail seedlings after use, and the survival rate of the seedlings after wintering is greatly improved.

[0034] Example 5: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. In the artificial sheepgrass field planted the previous year, the sheepgrass seedlings have turned green. At this time, there are a large number of perennial weeds such as plantain, mugwort, artemisia capillaris, wild carrot, dandelion, etc. mixed with sheepgrass in the grassland, which seriously affects the growth of the sheepgrass seedlings; 2. When the weeds grow vigorously, spray the leaves with a mass ratio of 1:1 of thifensulfuron-methyl and amlopyralid, and the multiple of the aqueous solution is 300 times; 3. After 20 days, the control effect of broadleaf weeds and the impact on the sheepgrass seedlings are counted.

[0035] Implementation results: It has a good preventive effect on perennial weeds such as plantain, mugwort, artemisia capillaris, wild carrot, dandelion, etc. in the artificial sheep fescue fields established in the second year, and has no adverse effects on the sheep fescue seedlings of the second year.

[0036] Example 6: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. In the artificial timothy grass field planted the previous year, the Elymus ovatus seedlings have turned green. At this time, there are a large number of perennial weeds such as plantain, mugwort, Artemisia capillaris, wild carrot, dandelion and timothy grass mixed with the grassland, which seriously affects the growth of timothy grass seedlings; 2. When the weeds grow vigorously, the mass ratio of bensulfuron-methyl and amlodipine is 1:1, and the multiple of the aqueous solution is 300 times. Spray the leaves; 3. After 10 days, the control effect of broadleaf weeds and the effect on timothy grass seedlings are counted.

[0037] deal with Plantago Mugwort Artemisia capillaris Wild carrot Dandelion Fresh weight protection effect (%) Fresh weight protection effect (%) Fresh weight protection effect (%) Fresh weight protection effect (%) Fresh weight protection effect (%) Example 6 80 83 77 92 75 Comparison 0 0 0 0 0

[0038] Example 7: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. In the artificial Elymus chinensis field planted the previous year, the Elymus chinensis seedlings have turned green. At this time, there are a large number of perennial weeds such as plantain, mugwort, Artemisia capillaris, wild carrot, dandelion, etc. mixed with Elymus chinensis in the grassland, which seriously affects the growth of Elymus chinensis seedlings; 2. When the weeds grow vigorously, spray the leaves with a mass ratio of 1:1 of thifensulfuron and clopyralid, and the multiple of 300 times of aqueous solution; 3. After 20 days, the control effect of broadleaf weeds and the effect on Elymus chinensis seedlings are counted.

[0039] Implementation results: It has a good preventive effect on perennial weeds such as plantain, mugwort, artemisia capillaris, wild carrot, dandelion, etc. in the artificial wheatgrass fields established in the second year, and has no adverse effects on the wheatgrass seedlings of the second year.

[0040] Example 8: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. In the artificial field of Elymus salsa planted the previous year, the seedlings of Elymus salsa have turned green. At this time, there are a large number of perennial weeds such as plantain, mugwort, Artemisia capillaris, wild carrot, dandelion, etc. mixed with Elymus salsa in the grassland, which seriously affects the growth of Elymus salsa seedlings; 2. When the weeds grow vigorously, the mass ratio of bensulfuron-methyl and clopyralid is 1:1, and the multiple of aqueous solution is 300 times. Spray the leaves; 3. After 10 days, the control effect of broadleaf weeds and the effect on Elymus salsa seedlings are counted.

[0041] Implementation results: It has a good preventive effect on perennial weeds such as plantain, mugwort, artemisia capillaris, wild carrot, dandelion, etc. in the artificial alkali grass fields established in the second year, and has no adverse effects on the alkali grass seedlings of the second year.

[0042] Example 9: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. The artificial sheepgrass field has been established for 5 years and faces a trend of degradation. There are a large number of perennial weeds such as plantain and dandelion mixed with sheepgrass in the grassland, which seriously affects the growth of sheepgrass; 2. When the weeds grow vigorously, spray the leaves with a mass ratio of 1:1 of thifensulfuron and clopyralid and a multiple of 300 times of aqueous solution; 3. After 10 days, the control effect of broadleaf weeds and the impact on sheepgrass are counted.

[0043] Implementation results: Broadleaf weed control in Leymus chinensis fields facing degradation can kill or severely inhibit the growth of Plantain and dandelion, have no adverse effects on Leymus chinensis, increase Leymus chinensis yield, and slow down the degradation of artificial grasslands.

[0044]

[0045] Example 10: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. The artificial timothy grass field, which has been planted for 4 years, faces a trend of degradation. There are a large number of perennial weeds such as plantain and dandelion mixed with timothy grass in the grassland, which seriously affects the growth of timothy grass; 2. When the weeds grow vigorously, thifensulfuron-methyl and amiloride are sprayed on the leaves with a mass ratio of 1:1 and an aqueous solution of 300 times; 3. After 10 days, the control effect of broadleaf weeds and the effect on sheepgrass are counted.

[0046] Implementation results: Broadleaf weed control in timothy fields facing degradation can kill or severely inhibit the growth of plantain and dandelion, have no adverse effects on timothy, and can effectively increase timothy yield and slow down the degradation of artificial grassland.

[0047]

[0048] Example 11: A drug combination and application for chemically controlling broadleaf weeds in artificial grassland. The details are as follows: 1. The artificial Elymus chinensis field has been established for 5 years. The Elymus chinensis field is facing a trend of degradation. There are a large number of perennial weeds such as plantain and dandelion mixed with Elymus chinensis in the grassland, which seriously affects the growth of Elymus chinensis; 2. When the weeds grow vigorously, the mass ratio of bensulfuron-methyl and clopyralid is 1:1, and the multiple of the aqueous solution is 300 times. Spray the leaves; 3. After 10 days, the control effect of broadleaf weeds and the effect on Elymus chinensis are counted.

[0049] Implementation results: This combination can control broad-leaved weeds in Elytium wilfordii fields facing degradation, seriously inhibit the growth of Plantain and Taraxacum, has no adverse effects on Elytium wilfordii, can effectively increase forage yields, and slow down the degradation of artificial grasslands.

[0050]

Claims

1. A drug combination and application for chemically controlling broadleaf weeds in artificial grassland, characterized in that: After establishing artificial grass grassland, during various growth periods of the grass, sulfonylurea herbicides that can prevent and control broad-leaved weeds and are harmless to grass are used in combination with pyridinecarboxylic acid herbicides to prevent or inhibit broad-leaved weeds in the field.

2. The artificial grass lawn according to claim 1, characterized in that: Artificially established perennial grass grasslands, including but not limited to perennial artificial grasslands such as Leymus chinensis, Agropyron lanceolata, Elymus ovata, and Cattail grass used for forage purposes.

3. The various growth periods of forage grass according to claim 2, characterized in that: It is necessary to control broadleaf weeds from the time perennial grasses emerge and are established to the following years.

4. The broadleaf weed according to claim 3, characterized in that: Annual and perennial broadleaf weeds growing in artificial grasslands.

5. The sulfonylurea herbicide combined with the pyridinic acid herbicide according to claim 4, which can control broadleaf weeds and has no harm to grasses, characterized in that: Sulfonylurea herbicides include bensulfuron-methyl and thifensulfuron-methyl; pyridinecarboxylic acid herbicides include clopyralid and amiloride.

6. The sulfonylurea herbicide combined with the pyridinic acid herbicide according to claim 5, characterized in that The mass ratio of the compound sulfonylurea herbicide to the pyridinic acid herbicide is 10:1 to 1:10, and the optimal ratio is 1:2 to 2:1.

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