CN112655712B - Composition for preventing and treating mikania micrantha, preparation and preventing and treating method thereof - Google Patents
Composition for preventing and treating mikania micrantha, preparation and preventing and treating method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of herbicides, and particularly discloses a composition for preventing and treating mikania micrantha, a preparation of the composition and a prevention and treatment method of the composition. The composition for preventing and treating mikania micrantha provided by the invention selects picloram or its salt, methoxone or its salt and bentazon as main components, and the three can generate a synergistic effect, so that the prevention and control effect on mikania micrantha can be obviously enhanced. According to the method for preventing and treating mikania micrantha, chemical medicine prevention and ecological prevention are organically combined, on the premise that a soil seed bank is not damaged, the composition provided by the invention is used for preventing and treating mikania micrantha in a large area, the revival capability of the mikania micrantha is reduced, meanwhile, the effect of completely killing the mikania micrantha is achieved by planting the acanthus spinosus or the rangooncreeper local tree seedlings in the mikania micrantha prevention and treatment area, preferentially seizing up growing resources in the area, effectively preventing and controlling the mikania micrantha, and rebuilding the ecological area through the organic combination of the medicine prevention and ecological prevention, and the popularization value is high.
Description
Technical Field
The invention relates to the technical field of herbicides, and particularly relates to a composition for preventing and treating mikania micrantha, a preparation of the composition and a prevention and treatment method of the composition.
Background
Mikania micrantha is a perennial herb of pseudoeupatorium (Mikania Willd) of Asteraceae (Asteraceae), is native to tropical america, is widely spread to regions such as south asia, southeast asia and pacific, and is one of the most harmful tropical and subtropical weeds which cause serious damage to natural ecosystems and serious economic loss. The characteristics of mikania micrantha, such as strong sexual propagation and asexual propagation capacity, high growth speed, strong allelopathy capacity and clone integration capacity, high photosynthetic potential, strong positive and the like, are the main reasons for rapidly invading the ecological environment. Mikania micrantha was listed as one of the 100 most invasive foreign species in the world by the International Union of Natural preservation and Natural resource preservation (IUCN) in 2001. In recent years, mikania micrantha has spread rapidly in hong kong, guangdong, fujian, guangxi, Yunnan and other areas, causing serious harm to local agriculture, forestry, ecological environment and the like.
At present, the prevention and treatment technology of mikania micrantha mainly comprises manual removal, chemical agent prevention and control, ecological control and the like. The artificial removal is a method for artificially blocking the overground vine diameter of the mikania micrantha and removing the overground vine diameter from the original growth area, and has the defects of poor prevention and removal effect, large consumption of manpower and material resources and the like. The chemical agent prevention and elimination has the advantages of convenient operation, relatively low cost, quick response and the like, and is an important means for large-scale prevention and control of mikania micrantha. The currently commonly used chemical agents mainly comprise 70% of sulfosulfuron water-soluble powder, 70% of 2,4-D microemulsion, 24% of hydrochloric acid and dichloropyrazole water aqua and the like, and the herbicides have the defects of strong resistance to mikania micrantha, large influence on soil microorganisms or other plants, much soil residue and the like, can not thoroughly kill underground parts of the mikania micrantha, can still quickly recover roots after application, and are difficult to realize the effect of safe and lasting control. The technical means of ecological prevention and control mainly comprises community forest phase transformation prevention and control and shading control technology. The students utilize community forest facies to transform prevention and control mikania micrantha, plant trees such as macaranga tanarius, Heteropana maple and Yinxiang to control the mikania micrantha, the planting distance is large, the mikania micrantha can invade again before trees are planted into forest, the technology needs to spend 2-3 years for nurturing, and the effect is slow. The shading control technology is to shade mikania micrantha through an opaque plastic film (black plastic film is good at present), mainly utilizes the plastic film to absorb sunlight and can not transmit light, the mikania micrantha is covered by the plastic film, and the mikania micrantha can not complete photosynthesis, so that the mikania micrantha can not grow normally, thereby controlling the mikania micrantha. Therefore, the method for comprehensively preventing and treating the mikania micrantha is important for realizing efficient, safe and lasting control of the mikania micrantha.
Disclosure of Invention
Aiming at the problems of unsatisfactory prevention effect, poor durability and the like of a prevention method of mikania micrantha in the prior art, the invention provides a composition for preventing and treating mikania micrantha, a preparation and a prevention method thereof.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
the effective components of the composition for preventing and treating mikania micrantha comprise a component I, a component II and a component III, wherein the component I is picloram or a salt thereof, the component II is methoxone or a salt thereof, and the component III is bentazone.
In the prior art, the composition for preventing and treating mikania micrantha provided by the invention selects the picloram or the salt thereof, the methoxone or the salt thereof and the bentazon to be compounded as main components, the picloram or the salt thereof, the methoxone or the salt thereof and the bentazon can generate a synergistic effect, the prevention and removal effects on the mikania micrantha can be obviously enhanced, the action mechanisms of the three components are different, and the generation of resistance of the mikania micrantha is favorably reduced. The composition for preventing and treating mikania micrantha provided by the invention is prepared by selecting raw materials with different action mechanisms, so that the preventing and removing effect on mikania micrantha is remarkably improved, the preventing and treating effect is durable, the preventing and treating effect reaches over 95% in 30 days, the resistance is reduced, the toxic action on soil and other plants is small, and the composition has great popularization value.
Preferably, the mass ratio of the component I, the component II and the component III is 15-20:2-6:1-3, wherein the amount of the picloram is calculated by the picloram, and the amount of the dimethyltetrachloro salt is calculated by the dimethyltetrachloro.
Under the condition of the optimal mass ratio, the picloram, the methoxone and the bentazon have very obvious synergistic effect, have excellent control effect on the mikania micrantha, and can prolong the control period.
Preferably, the picloram salt is picloram sodium salt, picloram potassium salt, picloram ammonium salt or picloram isopropylamine salt.
Preferably, the dimethyltetrachloro salt is dimethyltetrachloropotassium salt, dimethyltetrachlorodimethylamine salt, dimethyltetrachloroisopropylamine salt or dimethyltetrachlorocholine salt.
The invention also provides a herbicide for preventing and treating mikania micrantha, which comprises the composition for preventing and treating mikania micrantha.
Preferably, the herbicide for preventing and treating mikania micrantha also comprises an auxiliary agent, and the total mass of the effective components in the herbicide accounts for 18-25 wt%.
The content of the preferred effective components is beneficial to reducing the dosage of the herbicide, and higher control effect can be obtained with less application amount.
Preferably, the auxiliary agent comprises at least one of a wetting agent, a dispersing agent, a thickening agent, an anti-freezing agent or a filler.
Preferably, the wetting agent comprises at least one of sodium dodecylbenzene sulfonate, sodium dodecylbenzene sulfate, calcium dodecylbenzene sulfonate or fatty alcohol sulfate.
Preferably, the dispersant comprises at least one of lignosulfonate, alkylbenzenesulfonate, alkylethylsulfonate, polycarboxylate or methylenedinaphthalene sulfonate.
Preferably, the thickener comprises at least one of reduced gum, sodium polyacrylate, sodium carboxymethyl cellulose, gum arabic, or polyvinyl alcohol.
Preferably, the filler comprises at least one of kaolin, diatomaceous earth, white carbon, corn starch, calcium carbonate or sodium sulfate.
Preferably, the antifreeze agent comprises at least one of glycerol, ethylene glycol or propylene glycol.
In order to prepare the composition into various formulations, a plurality of additives are required to be added, and the wetting agent, the dispersing agent, the thickening agent, the antifreezing agent or the filler are all commonly used in the field of herbicides, and different additives, specific components and dosage can be selected according to different formulations and determined by routine experiments according to formulation requirements.
Optionally, the herbicide is in the form of a suspension or wettable powder.
The dosage form can be prepared by selecting conventional additives in the field of herbicides according to a conventional preparation process. The composition is prepared into various dosage forms, is convenient to use, is suitable for various administration modes, meets different medication requirements, and has a wide application range.
The invention also provides a method for preventing and treating mikania micrantha, which comprises the following steps:
the composition or the herbicide is sprayed on the leaf surfaces and stems of the mikania micrantha, and when more than 80% of leaves on the ground of the mikania micrantha wither, spiny cardamon or quisqualis indica seedlings are planted in the area for preventing and treating the mikania micrantha, watering is carried out regularly, and the Mikania micrantha is nursed for 2-4 months.
According to the method for preventing and treating mikania micrantha, provided by the invention, under the premise of not damaging a soil seed bank, the composition provided by the invention is used for preventing and removing mikania micrantha in a large area, the regeneration capacity of the mikania micrantha is reduced, meanwhile, the combination of planting the cardamom vine or the rangooncreek local soil seedlings in the mikania micrantha prevention and treatment area is utilized, the characteristics of high growth speed, strong diffusion capacity and strong environmental adaptability after transplantation are utilized, the growth resources in the area are preferentially occupied, and the mikania micrantha is effectively prevented and controlled. The ecological area is reconstructed through the organic combination of the drug control and the ecological control, so that the effect of completely killing the mikania micrantha is achieved, meanwhile, the composition adopted by the invention has small toxic action on soil, cannot influence the growth of the acanthopanax spinosus or the rangooncreeper fruit local soil seedlings, has short control tending time and long effect duration on the mikania micrantha, effectively reduces the economic cost for controlling the mikania micrantha, and is a comprehensive mikania micrantha control method with great popularization value.
Preferably, the height of the seedlings of the spiny fruit vine or the quisqualis indica seedlings is more than 25cm, the planting distance is 0.2-0.4m, and the planting row distance is 0.2-0.4 m.
More preferably, the plant spacing is 0.3m and the row spacing is 0.3 m.
Preferably, the application amount of the effective ingredients in the composition or the herbicide is 54-150g/hm2And water is added for 600-800L.
When the composition or herbicide for preventing and treating mikania micrantha is applied, the composition or herbicide is generally applied by adopting a method of spraying after dilution, and the application amount and dilution factor of the composition or herbicide are changed along with the change of the growth environmental conditions of the mikania micrantha.
Preferably, when the growth environment of mikania micrantha is towards the sunny slope or flat land, the application amount of the effective ingredients is 54-75g/hm2Adding water for 600-; when the growth environment of mikania micranthaThe application amount of the effective component is 81-113g/hm when the effective component is applied to the back-yang sloping field, flat field or valley2Adding water for 600-; when the growth environment of the mikania micrantha is a wetland, the application amount of the effective components is 108-150g/hm2And water is added for 600-800L.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In order to better illustrate the invention, the following examples are given by way of further illustration.
Example 1
The embodiment provides a weeding suspending agent for preventing and treating mikania micrantha, which comprises the following raw material components in percentage by mass:
23.2% of picloram potassium salt (which is reduced to 20% of picloram), 2.4% of tetrachloro dimethyl potassium salt (which is reduced to 2% of tetrachloro dimethyl), 1% of bentazon, 1% of sodium dodecyl benzene sulfonate, 4% of polycarboxylate dispersant, 0.5% of xanthan gum, 5% of glycerol and 100% of deionized water.
The components are uniformly mixed and evenly mixed by a sand mill to obtain the 23 percent suspending agent of picloram, methoxone and bentazon.
Example 2
The embodiment provides a weeding wettable powder for preventing and treating mikania micrantha, which comprises the following raw material components in percentage by mass:
16% of picloram, 7.2% of tetrachloro-dimethylmethane potassium salt (converted into tetrachloro-dimethylmethane 6%), 3% of bentazon, 1% of calcium dodecyl benzene sulfonate, 1% of lignosulfonate dispersant, 10% of white carbon black and 100% of kaolin.
The components are uniformly mixed and crushed by a crusher to prepare 25 percent picloram-methoxone wettable powder.
Example 3
The embodiment provides a weeding suspending agent for preventing and treating mikania micrantha, which comprises the following raw material components in percentage by mass:
16.1% of picloram ammonium salt (which is converted into picloram 15%), 7.3% of dimethyldichlorodimethylamine salt (which is converted into dimethyltetrachloro 6%), 3% of bentazon, 5% of fatty alcohol sulfate, 2% of methylene dinaphthalene sulfonate dispersant, 0.2% of xanthan gum, 5% of ethylene glycol and 100% of deionized water.
The components are uniformly mixed and then are uniformly mixed by a sand mill to obtain the 24 percent suspending agent of picloram, methoxone and bentazon.
Example 4
The embodiment provides a weeding wettable powder for preventing and treating mikania micrantha, which comprises the following raw material components in percentage by mass:
15% of picloram, 1% of tetrachlor, 2% of bentazone, 1% of calcium dodecyl benzene sulfonate, 1% of lignosulfonate dispersant, 10% of white carbon black and 100% of kaolin.
The components are uniformly mixed and crushed by a crusher to prepare the 18 percent picloram-methoxone wettable powder.
Comparative example 1
This comparative example used the same raw materials and preparation method as those used in example 3, except that picloram in example 3 was replaced with clopyralid to prepare a 24% clopyralid-methoxone suspension.
Comparative example 2
This comparative example used the same starting materials and preparation method as in example 3, except that the same amount of 2,4-D was substituted for the methoxone salt in example 2 to prepare a 24% picloram.2, 4-D bentazon suspension.
In order to determine the mikania micrantha control effect of the product, the agents prepared in examples 1 to 4 are applied to prevention and control of the mikania micrantha in the forest land, each treatment is repeated for 3 times, and the mikania micrantha killing effect is calculated after 30 days of application, wherein the calculation formula is as follows:
P＝(B-A)/B×100
in the formula, P represents the killing rate (%) of mikania micrantha, A represents the coverage of mikania micrantha after spraying, and B represents the coverage of mikania micrantha before spraying. The coverage is the percentage of the vertical projection area of the overground part of mikania micrantha in the total area of the sample plot.
Selecting areas with severe harm to mikania micrantha on sunny sloping land or flat land, and respectively spraying 75g/hm2、150g/hm2、300g/hm2The pharmaceutical preparation of examples 1-4, prepared by mixing 700L of water; selecting areas with serious harm to mikania micrantha on back-sunny sloping fields, flat lands or furrows, and respectively spraying 225g/hm2、450g/hm2、900g/hm2The pharmaceutical preparation of examples 1-4, prepared by mixing 700L of water; respectively spraying 300g/hm in selected wetland area with serious harm to mikania micrantha2、600g/hm2、1200g/hm2The pharmaceutical preparations prepared in examples 1 to 4 were mixed with 700L of water. The coverage of mikania micrantha was recorded 30 days after application and the kill rate was calculated and the results are shown in table 1.
TABLE 1
The same control effect as that of 700L water can be achieved by changing the application amount in the above examples 1-4 to 600L or 800L water.
As can be seen from the above table, the agents prepared in examples 1-4 were sprayed on a sunny slope or flat ground at 300g/hm2The pesticide can prevent and treat mikania micrantha, and the killing rate is more than 95%; spraying 450g/hm on the slope of the back sun, flat ground or furrow2The pesticide can prevent and treat mikania micrantha, and the killing rate is more than 98%; spraying 600g/hm on wetland2The pesticide can prevent and treat mikania micrantha with a killing rate of 100%. The compounded medicament is proved to have excellent prevention and treatment effect on the mikania micrantha. Therefore, it is recommended to spray 300g/hm on a sunny slope or flat ground2The preparation for preventing and treating mikania micrantha is added with water for 600 plus 800L; spraying 450g/hm on the slope of the back sun, flat ground or furrow2The preparation for preventing and treating mikania micrantha is added with water for 600 plus 800L; spraying 600g/hm on wetland2The pesticide can be used for preventing and treating mikania micrantha, and is mixed with water for 600 plus 800L.
Next, the 24% suspension of Picloram-Dichlorotetrachloro-bentazone prepared in example 3 was applied at a dose of 300g/hm2、450g/hm2、600g/hm2Tests on the killing effect of the compound medicament and the single agent on mikania micrantha are carried out, and the synergistic effect of the three effective components is proved.
The test method comprises the following steps: adopt indoor potted plant to carry out the experiment, gather mikania micrantha stem section from the field, water planting mikania micrantha earlier, move into the plastic flowerpot that the diameter is 20cm after the mikania micrantha rooting, 6 plants mikania micrantha in each basin, after mikania micrantha normal growth, adopt stem leaf spraying method spraying liquid medicine, the drug effect test of the medicament of embodiment 3 and single dose sets up different processing, and every is handled 3 and is repeated. And (5) investigating the growth condition of the mikania micrantha 30 days after the application, measuring the fresh weight of the mikania micrantha, and calculating the fresh weight inhibition rate. Evaluating the combined action of the three medicines after mixing by adopting a Growing method, and calculating the theoretical fresh weight inhibition rate (E) through the actually measured fresh weight inhibition rate (E) of the medicine0) And E is calculated by the following formula0:
E0＝X+[Y×(100-X)/100]
In the formula: x represents the fresh weight inhibition rate of picloram on mikania micrantha; y represents the sum of the fresh weight inhibition rates of the 2 single agents (methoxone and bentazon) except picloram on mikania micrantha.
Evaluation criteria: when E-Eo > 10%, indicating a synergistic effect; when the E-Eo is more than or equal to 10 percent and less than or equal to 10 percent, a synergistic and additive effect is shown; when E-Eo < -10%, antagonism is indicated. The results are shown in Table 2.
TABLE 2
| Medicament | Dosage (g/hm)2) | 30d actual inhibition ratio E (%) | Theoretical inhibition rate E0(％) | E-E0(％) |
| Aminopyridic acid-1 | 225 | 79.2 | ||
| Aminopyridic acid-2 | 338 | 84.6 | ||
| Aminopyridic acid-3 | 450 | 88.0 | ||
| Dichloro-1 | 50 | 4.5 | ||
| Dichloro-2 | 75 | 7.8 | ||
| Dichloro-3 | 100 | 9.6 | ||
| Bendalong-1 | 25 | 3.5 | ||
| Bendalong-2 | 37 | 5.6 | ||
| Bendalong-3 | 50 | 6.5 | ||
| Example 3-1 | 225+50+25＝300 | 98.8 | 80.9 | 17.9 |
| Examples 3 to 2 | 338+75+37＝450 | 100.0 | 86.7 | 13.3 |
| Examples 3 to 3 | 450+100+50＝600 | 100.0 | 89.9 | 10.1 |
Note: example 3-1, example 3-2, and example 3-3 dose portions, the first amount being the amount of picloram (225 g/hm, respectively)2、338g/hm2、450g/hm2) The second amount is the amount of methoxone (50 g/hm each)2、75g/hm2、100g/hm2) The third dosage is the dosage of bentazon (25 g/hm respectively)2、37g/hm2、50g/hm2). All are sprayed after being mixed with 700L of water.
As can be seen from the table above, the synergistic effect of the compound of picloram, methoxone and bentazon on mikania micrantha is obvious.
In addition, the mikania micrantha prepared in example 3 and comparative examples 1-2 were selected for the sunny slope and subjected to field mikania micrantha control effect test comparison. The test results are shown in table 3.
TABLE 3
As can be seen from the above table, the prevention and treatment effect is significantly reduced by replacing any active ingredient in the agent of the present invention with another substance.
Test of field drug effect
The experiment is carried out on Shenzhen greenhouse new region mikania micrantha sunny sloping field, 3 sample plots with the size of 10m and 10m are arranged, the chemical agent control is carried out firstly, and the agent prepared in the example 3 is carried out according to the proportion of 300g/hm2The application dosage (water is added by 700L) is sprayed on the leaf surfaces and stems of the mikania micrantha, when the leaves of the mikania micrantha show that more than 80% of overground parts of plants die, the spiny vine seedlings are planted according to the row spacing of 0.3m multiplied by 0.3m, and the seedlings are watered regularly and nursed for 4 months.
Setting a control sample plot, using 24% clopyralid 2,4-D suspending agent as chemical control agent, the application rate is 300mg/hm2(700L of water is added), the fertilizer is sprayed on leaf surfaces and stems of mikania micrantha, when the leaves of the mikania micrantha show that more than 80% of overground parts of plants are withered, macaranga tanarius is planted according to the row spacing of 1m multiplied by 2m, and the seeds are nursed for 4 months. The monitoring was continued for 12 months with a frequency of monitoring every 3 months.
The test result shows that after the liquid medicine prepared in the example 3 is sprayed for 30 days, the killing rate of the mikania micrantha in the area reaches 98%, and the mikania micrantha is basically not in the sample area. Half a year after the seedlings of the acanthus spinosus are planted, the acanthus spinosus in the area gradually grows, seedlings such as kalopanax septemlobus, wild taro, ramie and the like exist in the sample plot, and mikania micrantha completely exits the habitat.
After the 24% clopyralid 2,4-D suspending agent is sprayed on a control sample plot, the killing rate of mikania micrantha reaches 92%, a little mikania micrantha exists in the sample plot, and after macaranga tanarius is planted, the mikania micrantha grows up again, and the mikania micrantha adheres to the trunk or leaves of the macaranga tanarius.
The same effect of preventing and killing mikania micrantha as the roxburgh anoectochilus terminal bud can be achieved by replacing the sapling in the example with rangooncreeper fruit and keeping other conditions unchanged.
The effect equivalent to that of example 3 can be achieved by replacing the ammonium piclorate salt and the methoxone dimethylamine salt in example 3 with other piclorate salts or other methoxone salts defined in the present invention.
In conclusion, the method for preventing and treating mikania micrantha provided by the invention organically combines chemical medicine prevention and ecological prevention, the chemical medicine prevention and ecological prevention and control are coordinated and promoted, the regional ecology is rebuilt on the premise of not damaging a soil seed bank, the effect of completely killing mikania micrantha is achieved, the adopted chemical medicine has small toxic action on soil and plants, the prevention and treatment tending time is short, the duration is long, meanwhile, the economic cost for preventing and treating mikania micrantha is effectively reduced, and the popularization value is high.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. The composition for preventing and treating mikania micrantha is characterized in that the effective components of the composition comprise a component I, a component II and a component III, wherein the component I is picloram or salts thereof, the component II is methoxone or salts thereof, and the component III is bentazone; the mass ratio of the component I, the component II and the component III is 15-20:2-6:1-3, wherein the amount of the picloram is calculated by the amount of picloram, and the amount of the ditetrachlor is calculated by the amount of methoxone.
2. The composition for controlling mikania micrantha according to claim 1, wherein the picloram salt is selected from the group consisting of picloram sodium salt, picloram potassium salt, picloram ammonium salt and picloram isopropylamine salt; and/or
The dimethyl tetrachloro salt is dimethyl tetrachloro potassium salt, dimethyl tetrachloro dimethylamine salt, dimethyl tetrachloro isopropyl amine salt or dimethyl tetrachloro choline salt.
3. The composition for controlling mikania micrantha according to claim 1, further comprising an auxiliary agent, wherein the total mass of the active ingredients in the composition is 18-25 wt%.
4. A composition for controlling mikania micrantha according to claim 3, where the adjuvant comprises at least one of a wetting agent, a dispersing agent, a thickening agent, an anti-freeze agent or a filler.
5. The mikania micrantha-controlling composition according to claim 4, wherein the wetting agent comprises at least one of sodium dodecylbenzene sulfonate, sodium dodecylbenzene sulfate, calcium dodecylbenzene sulfonate or fatty alcohol sulfate; and/or
The dispersant comprises at least one of lignosulfonate, alkylbenzene sulfonate, alkyl ethyl sulfonate, polycarboxylate or methylene dinaphthalene sulfonate; and/or
The thickening agent comprises at least one of reducing gum, sodium polyacrylate, sodium carboxymethylcellulose, Arabic gum or polyvinyl alcohol; and/or
The filler comprises at least one of kaolin, diatomite, white carbon black, corn starch, calcium carbonate or sodium sulfate; and/or
The antifreeze comprises at least one of glycerol, ethylene glycol or propylene glycol.
6. The composition for controlling mikania micrantha according to any one of claims 1 to 5, wherein the composition is formulated as a suspension or a wettable powder.
7. A method for preventing and treating mikania micrantha is characterized by comprising the following steps:
spraying the composition of any one of claims 1-6 on the leaf surfaces and stems of mikania micrantha, planting the acanthus or quisqualis indica seedlings in the area for preventing and treating mikania micrantha when more than 80% of the leaves on the ground of the mikania micrantha wither, watering regularly, and tending for 2-4 months.
8. The method for controlling mikania micrantha according to claim 7, wherein the height of the seedlings of the spiny cardamon or quisqualis indica seedlings is more than 25cm, the plant spacing is 0.2-0.4m, and the planting row spacing is 0.2-0.4 m; and/or
The application amount of the effective components in the composition or the herbicide is 54-150g/hm2And water is added for 600-800L.
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