CN116158449A - Radix linderae extract herbicide and application thereof - Google Patents

Radix linderae extract herbicide and application thereof Download PDF

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CN116158449A
CN116158449A CN202211272581.5A CN202211272581A CN116158449A CN 116158449 A CN116158449 A CN 116158449A CN 202211272581 A CN202211272581 A CN 202211272581A CN 116158449 A CN116158449 A CN 116158449A
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extract
herbicide
root extract
lindera
radix linderae
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CN116158449B (en
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吴华
李佳
任梦楠
王勇
周一万
冯俊涛
马志卿
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Northwest A&F University
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
    • A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
    • A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
    • A01N65/08—Magnoliopsida [dicotyledons]
    • A01N65/24—Lauraceae [Laurel family], e.g. laurel, avocado, sassafras, cinnamon or camphor
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01P—BIOCIDAL, PEST REPELLANT, PEST ATTRACTANT OR PLANT GROWTH REGULATORY ACTIVITY OF CHEMICAL COMPOUNDS OR PREPARATIONS
    • A01P13/00—Herbicides; Algicides
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/30—Against vector-borne diseases, e.g. mosquito-borne, fly-borne, tick-borne or waterborne diseases whose impact is exacerbated by climate change

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  • General Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
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  • Environmental Sciences (AREA)
  • Plant Pathology (AREA)
  • Dentistry (AREA)
  • Agronomy & Crop Science (AREA)
  • Pest Control & Pesticides (AREA)
  • Natural Medicines & Medicinal Plants (AREA)
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  • Chemical Kinetics & Catalysis (AREA)
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  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention provides a combined spicebush root extract herbicide and application thereof, and application of the combined spicebush root extract in preparing the herbicide. The radix Linderae extract is ethanol extract of radix Linderae. The preparation method of the lindera root extract comprises the following steps: reflux-extracting radix Linderae stem powder with ethanol to obtain radix Linderae ethanol crude extract, and concentrating under reduced pressure to obtain radix Linderae extract; the leaching temperature is 50-80 ℃ and the leaching time is 6-12 h. The mass percentage of the lindera root extract in the herbicide is 10-50%. The combined spicebush root extract herbicide disclosed by the invention has an obvious control effect on barnyard grass, crushed cyperus rotundus, common weeds such as water peanut, purslane and green bristlegrass, and has potential application and popularization values.

Description

Radix linderae extract herbicide and application thereof
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to a pesticide and a preparation method thereof, in particular to a combined spicebush root extract herbicide and application thereof.
Background
The weeds and crops contend for fertilizer, light and space, and the yield and quality of the crops are seriously affected. And some weeds are intermediate hosts of crop diseases and insect pests or overwintering places, so that the spread and spread of the diseases and insect pests are promoted. Thus, to ensure a good harvest of the crop, weeding runs through the whole process from sowing to harvesting. Weeds in ornamental lawns not only affect aesthetics but also prevent growth of turf grass, and thus weeding is also required.
With the continuous development of lawn industry in China, the requirement of environment beautification is increasingly increased, and weed control becomes an important link in the lawn maintenance management process. In the early years, the prevention and removal of weeds are generally mainly performed manually, and manual weeding is time-consuming and labor-consuming and has low efficiency. With the popularization of technology, herbicide pesticides have become increasingly popular. Herbicide pesticides are synthetic chemicals used to kill or control weed growth, protect crops and ornamental lawns. The herbicide has the characteristics of rapidness, high efficiency and economy, can greatly improve the labor productivity, is an indispensable advanced technology for realizing the modernization of agriculture, becomes an important guarantee for stable and high yield of agriculture, and has very important significance for improving the existing cultivation system.
At present, the method for preventing and controlling weeds mainly depends on a chemical prevention and control method. The chemical control method uses chemical pesticides and adopts the chemical machinery to apply the pesticides, so that the effect is quick, the efficiency is high, the use method is simple and convenient, and the application advantages are unique. However, the use of chemical pesticides in large quantities causes damage to the ecological environment, and pesticide residues often cause harm to non-target organisms. The biological control method has the characteristics of environmental friendliness, safety to beneficial organisms in nature and the like, and is a new idea for solving the problems in the prevention and control of weeds.
The dry root tuber of lindera root (Linderaaggregata (Sims) Kosterm.) is the root tuber of lindera root of lindera genus of Lauraceae family, and its chemical components include furan sesquiterpene and lactone, volatile oil, flavone, isoquinoline alkaloid, etc., mainly has broad pharmacological activities such as antibacterial, antiviral, antiinflammatory, analgesic, antitumor, antioxidant, etc., and has remarkable regulating and protecting effects on digestive system, cardiovascular system, diabetic nephropathy, liver and central nervous system. The combined spicebush root is mainly produced in Zhejiang, jiangxi, hunan provinces and the like, and is distributed in a plurality of domestic areas, wherein the combined spicebush root is called as the "Tai combined spicebush root" which is the area of the combined spicebush root where the combined spicebush root is produced in the sky of Zhejiang. In recent years, although the pharmacological effect research of the lindera root extract is mainly focused on the aspects of antibiosis and antivirus, the research on secretion of digestive juice, myocardial excitation and hemagglutination is more reported, the research on the aspect of weed control of the lindera root extract is not reported at present.
Disclosure of Invention
The invention aims to provide a combined spicebush root extract herbicide and application thereof, and experiments show that the combined spicebush root extract has herbicidal activity and is prepared by preparing specific medicaments in field experiments.
In order to achieve the above task, the technical scheme adopted by the invention is as follows:
the application of radix Linderae extract in preparing herbicide is provided.
Optionally, the lindera root extract is an alcohol extract of lindera root.
Optionally, the preparation method of the lindera root extract comprises the following steps:
reflux-extracting radix Linderae stem powder with ethanol to obtain radix Linderae ethanol crude extract, and concentrating under reduced pressure to obtain radix Linderae extract;
the leaching temperature is 50-80 ℃ and the leaching time is 6-12 h.
Alternatively, the leaching temperature is 75 ℃.
Optionally, the mass percentage of the lindera root extract in the herbicide is 10% -50%.
The active ingredient of the herbicide is the lindera root extract, and the content of the lindera root extract in the herbicide is 10-50% by mass percent.
Optionally, the herbicide is prepared from the following raw materials in percentage by mass:
lindera root extract: 10% -50% of organic solvent: 30% -60%, surfactant: 5% -20%, antifreezing agent: 4-10%, wherein the sum of the weight percentages of the raw materials is 100%.
Optionally, the herbicide is prepared from the following raw materials in percentage by mass:
lindera root extract: 10% -20%, organic solvent: 30% -650%, surfactant: 10% -30%, antifreezing agent: 4% -10% and the balance of water, wherein the sum of the weight percentages of the raw materials is 100%.
Optionally, the herbicide is prepared from the following raw materials in percentage by mass:
weighing and dissolving 18kg of lindera root extract, 15kg of ethyl acetate and 55kg of sec-butyl acetate, adding 15kg of sodium dodecyl benzene sulfonate and 5kg of ethylene glycol under stirring, and uniformly stirring to obtain 100kg of 18% lindera root extract soluble liquid P1.
Optionally, the herbicide is prepared from the following raw materials in percentage by mass:
weighing 10kg of lindera root extract, dissolving in 40kg of ethyl acetate, adding 15kg of calcium dodecyl benzene sulfonate and 5kg of agricultural emulsion 500 under stirring, adding 4kg of glycol, heating the above solution to 40 ℃, and adding 26kg of deionized water under high-speed stirring; and after the dripping is finished, stirring for 45min, and cooling to obtain 10% lindera root extract microemulsion.
The invention has the following advantages:
the lindera root extract provided by the invention has good prevention and removal effects on weeds, has the advantages of environment friendliness, high safety, low toxicity, low residue, difficulty in generating drug resistance and the like, and can be used as a potential medicament for preventing and treating diseases caused by plant pathogenic bacteria.
Detailed Description
For a better understanding of the technical content of the present invention, specific examples are provided below to further explain the present invention.
The application of radix Linderae extract in preparing herbicide is provided.
The radix Linderae extract is ethanol extract of radix Linderae. Specifically, the lindera root extract is obtained by drying and pulverizing lindera root stems, sieving with a 40-mesh sieve to obtain powder, leaching the powder with 95% ethanol at 75 ℃ by a reflux method, repeatedly extracting for 3 times, each time for 6 hours to obtain a lindera root crude ethanol extract, and concentrating under reduced pressure to obtain lindera root extract.
The preparation method of the lindera root extract comprises the following steps: reflux-extracting radix Linderae stem powder with ethanol to obtain radix Linderae ethanol crude extract, and concentrating under reduced pressure to obtain radix Linderae extract; the leaching temperature is 50-80 ℃ and the leaching time is 6-12 h. The preferred leaching temperature is 75 ℃.
The mass percentage of the lindera root extract in the herbicide is 10-50%.
The active ingredient of the herbicide is the lindera root extract, and the content of the lindera root extract in the herbicide is 10-50% by mass percent. Specifically, the lindera root extract is obtained by pulverizing lindera root stems, extracting with alcohol, and concentrating. More specifically, the temperature of the alcohol extraction is 50-80 ℃, and the time of the alcohol extraction is 6-12 h.
The herbicide is prepared from the following raw materials in percentage by mass: lindera root extract: 10% -20%, organic solvent: 30% -60%, surfactant: 10% -30%, antifreezing agent: 4% -10% and the balance of water, wherein the sum of the weight percentages of the raw materials is 100%.
The herbicide is prepared from the following raw materials in percentage by weight: lindera root extract: 10% -50% of organic solvent: 30% -60%, surfactant: 5% -20%, antifreezing agent: 4-10%, wherein the sum of the weight percentages of the raw materials is 100%.
The organic solvent is one or more of solvent oil 120#, solvent oil 150#, solvent oil 200#, ethyl acetate, sec-butyl acetate, cyclohexanone, methyl oleate and ethanol; the surfactant is one or more of alkyl benzene sulfonate, alkylphenol polyoxyethylene ether, phenethyl phenol polyoxyethylene ether and the like, an adduct of castor oil and ethylene oxide and an aralkyl phenol polyoxyethylene ether formaldehyde condensate; the antifreezing agent is glycol or glycerol.
Further comprises: (1) Adding the auxiliary agent into the obtained lindera root extract according to the formula amount, and uniformly mixing in a mixing kettle to obtain the lindera root soluble liquid; (2) And (3) placing the obtained lindera root extract and the auxiliary agent in a mixing kettle according to the formula amount, wherein the temperature of the mixing kettle is 35-60 ℃, the stirring time is 30 minutes, and cooling after uniformly stirring to obtain the lindera root microemulsion.
The experimental methods used in the invention are all conventional methods unless otherwise specified.
The equipment and reagents used in the experiments of the invention can be obtained by purchasing unless otherwise specified.
Example 1 preparation of Linderae radix extract
Drying and pulverizing lindera root stems, sieving with a 40-mesh sieve to obtain 100kg of lindera root powder, adding 500kg of 95% ethanol into the powder, heating to 75 ℃, extracting for 6h, filtering, repeating for 3 times, mixing the filtrates to obtain crude lindera root rhizome extract, and concentrating the crude extract under reduced pressure to obtain 10kg of lindera root extract.
Example 2 test of inhibitory Activity of Linderae radix extract on root growth and bud growth of weeds
Seed germination experiments were performed using the cuvette method (petri dish). Washing with pure water for 3 times, and soaking for 1h. 2 layers of filter paper are paved in a 9cm culture dish, 3mL of test solution is accurately added respectively, 3mL of 95% ethanol is added in a control mode, 5mL of distilled water is added after the solvent volatilizes, target plant seeds with full seeds and uniform size are selected to be placed in the culture dish paved with 2 layers of filter paper, and 10 seeds are placed in each culture dish. 3 replicates were set for each set of treatments. The root and shoot lengths of the seeds in each dish were counted after 7d, and the inhibition rate was calculated. During primary screening, the aquilaria sinensis extract is dissolved by using 95% ethanol to prepare a solution with the concentration of 500 mug/mL, 3mL of the solution is absorbed and dripped into a culture dish for spreading the seeds, the result is shown in table 1 after 7d, and a concentration gradient of 600-37.5 mug/mL is prepared in the same way, and the result is shown in table 2.
Table 1 Primary screening inhibitory Activity of Linderae radix extract on barnyard grass and purslane root length and bud length
Figure BDA0003895295750000041
Note that: table 1 is preliminary screening experimental data. The concentration of the lindera root extract is 500 mug/mL. Control agent: the water dispersible granule bensulfuron-methyl (purslane) is 115.4 mug/mL; the high-efficiency haloxyfop-R-methyl (barnyard grass) of the emulsifiable concentrate is 10.8 mug/mL.
Table 2 inhibitory Activity of Linderae radix extract on barnyard grass and purslane root growth and bud growth
Figure BDA0003895295750000042
Figure BDA0003895295750000051
Note that: table 2 shows the data of the indoor concentration gradient experiment. The concentration gradient of the lindera root extract is 600 mug/mL, 300 mug/mL, 150 mug/mL, 75 mug/mL and 37.5 mug/mL. Control agent: the water dispersible granule bensulfuron-methyl (purslane) is 115.4 mug/mL; the high-efficiency haloxyfop-R-methyl (barnyard grass) of the emulsifiable concentrate is 10.8 mug/mL.
EXAMPLE 3 preparation of 18% Linderae radix extract soluble liquor
Weighing and dissolving 18kg of lindera root extract, 15kg of ethyl acetate and 55kg of sec-butyl acetate, adding 15kg of sodium dodecyl benzene sulfonate and 5kg of ethylene glycol under stirring, and uniformly stirring to obtain 100kg of 18% lindera root extract soluble liquid P1.
EXAMPLE 4 preparation of 10% Linderae radix extract microemulsion
Weighing 10kg of lindera root extract, dissolving in 40kg of ethyl acetate, adding 15kg of calcium dodecyl benzene sulfonate and 5kg of agricultural emulsion 500 under stirring, adding 4kg of ethylene glycol, heating the above solution to 40 ℃ in a homogenizer, and adding 26kg of deionized water under high-speed stirring; and after the dripping is finished, stirring for 45min, and cooling to obtain 10% lindera root extract microemulsion P2.
EXAMPLE 5 preparation of 50% Linderae radix extract soluble liquor
50kg of lindera root extract and 35 kg of ethyl acetate are weighed, 10kg of sodium dodecyl benzene sulfonate and 5kg of ethylene glycol are added under stirring, and 100kg of 50% lindera root extract soluble liquid P3 is obtained under stirring.
Example 6P1 field test for weed control in greenhouse vegetables
Selecting three perennial vegetable planting fields in greenhouse vegetable field of Dali test base, wherein each field is 667m 2 . The P1 produced in the example 3 is directly used, the mu consumption is 100g, the dilution is 500 times, the contrast agent 20% of the dichlormid missible oil is diluted 1000 times, and the water spray is added, and the result shows that the prevention effect of the P1 agent on the pond, the green bristlegrass, the herba Xanthii and the purslane reaches about 73.08-80.00%, and the prevention effect is slightly higher than that of the contrast agent 20% of the dichlormid missible oil treatment group, and the specific is shown in the figure 3.
Table 3P1 field test results for weed control in greenhouse vegetables
Figure BDA0003895295750000052
Figure BDA0003895295750000061
Example 7P2 field test for controlling weeds in paddy field
In Shanxi Han, a large amount of aquatic weeds such as barnyard grass, peanut, nutgrass galingale and the like exist in a paddy field in a certain town, so that the paddy rice production is endangered. The P2 formulated as in example 4 was sprayed, and the control formulation was 10% bentazone aqueous formulation and the random cell test was performed with the following results. Each cell 25m 2 5 points are investigated per cell, and the investigation area is 1m 2 . The pesticide spraying is carried out in the 4-6 leaf stage of the rice, so that the pesticide can not cause phytotoxicity to the rice. The effect of the administration was investigated 30d after the drug administration (Table 4). The number of residues is an average of 3 replicates per agent concentration treatment survey cell, and the calculation formula is shown below. When 100 g/mu of P2 is used, the control effect reaches 70.19-78.15 percent, and the content of the bentazone water agent is slightly higher than 10 percent.
Figure BDA0003895295750000062
Table 4P2 results of field test for controlling weeds in farmlands
Figure BDA0003895295750000063
Example 8P2 field test for weed control in Water flowers
On a farm of Sichuan, a large number of water flowers are bred, a field with uniform growth is selected and divided into 1m 2 Each treatment was repeated four times for a random block trial. P2 produced according to example 4 was sprayed at a dose of 120g per mu and diluted 1000-fold. The control agent adopts 20% fluoxastrobin emulsifiable concentrate preparation, the blank control is clear water control, and the statistical result after 30 days of administration is as follows. The number of residues is the average of 3 replicates per agent concentration treatment survey cell.
Figure BDA0003895295750000064
Table 5P2 field test results of water-repellent peanuts
Treatment of Average number of stumps per cell Average control effect (%) Average fresh weight per cell (g) Average control effect (%)
P240 g/mu 6.43 46.42 79.20 43.43
P280 g/mu 5.56 53.67 63.21 54.86
P2120 g/mu 3.20 73.33 42.82 69.43
8% fluoxastrobin 120 g/mu 5.43 54.75 48.92 65.06
CK 12.21 - 140.02 -
The results in Table 5 show that the effect of P2 is obviously better than that of 20% fluoxastrobin 120 g/mu when 120 g/mu is used.
Example 9P3 field trials for controlling corn weeds
The weeds are clustered in spring from the week of Shaanxi to the corn field of county. P3 preparation (3 different concentrations) is sprayed, and a control medicament adopts 30% glyphosate aqueous solutionDividing each cell by 4m by adopting a random cell test 2 4 points were investigated per cell, the investigation area was 0.25m 2 . The number of residues is the average of 3 replicates per agent concentration treatment survey cell. ,
Figure BDA0003895295750000071
table 6 results of field trials for M1, M2 and M3 control of corn weeds
Figure BDA0003895295750000072
The results are shown in Table 6, with P3 in 60mg/m extract 2 The dosage is equivalent to that of the control medicament of 30% glyphosate aqua treatment, and the control effect is more than 80% on the green bristlegrass and purslane weeds.
While the invention has been described in detail in the foregoing general description and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Accordingly, such modifications or improvements may be made without departing from the spirit of the invention and are intended to be within the scope of the invention as claimed.

Claims (10)

1. The application of radix Linderae extract in preparing herbicide is provided.
2. The use according to claim 1, wherein the lindera extract is an alcoholic extract of lindera.
3. The use according to claim 1 or 2, wherein the lindera root extract is prepared by the following method:
reflux-extracting radix Linderae stem powder with ethanol to obtain radix Linderae ethanol crude extract, and concentrating under reduced pressure to obtain radix Linderae extract;
the leaching temperature is 50-80 ℃ and the leaching time is 6-12 h.
4. The use according to claim 3, wherein the leaching temperature is 75 ℃.
5. The use according to claim 1 or 2, wherein the combined spicebush root extract in the herbicide is 10-50% by mass.
6. The radix linderae extract herbicide is characterized in that the active ingredient of the herbicide is radix linderae extract, and the content of the radix linderae extract in the herbicide is 10-50% by mass percent.
7. The combined spicebush root extract herbicide according to claim 6, wherein the herbicide is in the form of a soluble liquid, and the soluble liquid is prepared from the following raw materials in percentage by mass:
lindera root extract: 10% -50% of organic solvent: 30% -60%, surfactant: 5% -20%, antifreezing agent: 4-10%, wherein the sum of the weight percentages of the raw materials is 100%.
8. The combined spicebush root extract herbicide according to claim 6, wherein the herbicide is prepared from the following raw materials in percentage by mass:
lindera root extract: 10% -20%, organic solvent: 30% -650%, surfactant: 10% -30%, antifreezing agent: 4% -10% and the balance of water, wherein the sum of the weight percentages of the raw materials is 100%.
9. The combined spicebush root extract herbicide according to claim 6, wherein the herbicide is in the form of a soluble liquid, and the soluble liquid is prepared from the following raw materials in percentage by mass:
weighing and dissolving 18kg of lindera root extract, 15kg of ethyl acetate and 55kg of sec-butyl acetate, adding 15kg of sodium dodecyl benzene sulfonate and 5kg of ethylene glycol under stirring, and uniformly stirring to obtain 100kg of 18% lindera root extract soluble liquid P1.
10. The combined spicebush root extract herbicide according to claim 6, wherein the herbicide is prepared from the following raw materials in percentage by mass:
weighing 10kg of lindera root extract, dissolving in 40kg of ethyl acetate, adding 15kg of calcium dodecyl benzene sulfonate and 5kg of agricultural emulsion 500 under stirring, adding 4kg of glycol, heating the above solution to 40 ℃, and adding 26kg of deionized water under high-speed stirring; and after the dripping is finished, stirring for 45min, and cooling to obtain 10% lindera root extract microemulsion.
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