CN113016763A - Planting method for preventing and controlling tobacco root-knot nematodes - Google Patents
Planting method for preventing and controlling tobacco root-knot nematodes Download PDFInfo
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- CN113016763A CN113016763A CN202110197243.9A CN202110197243A CN113016763A CN 113016763 A CN113016763 A CN 113016763A CN 202110197243 A CN202110197243 A CN 202110197243A CN 113016763 A CN113016763 A CN 113016763A
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
- A01M19/00—Apparatus for the destruction of noxious animals, other than insects, by hot water, steam, hot air, or electricity
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G13/00—Protecting plants
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
- A01G22/45—Tobacco
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G7/00—Botany in general
- A01G7/06—Treatment of growing trees or plants, e.g. for preventing decay of wood, for tingeing flowers or wood, for prolonging the life of plants
Abstract
The technical problem to be solved by the invention is to provide a planting method for preventing and treating tobacco root-knot nematodes, which has good effect of preventing and treating the root-knot nematodes, high efficiency, economy and environmental protection. The planting method comprises the steps of seed selection and seedling raising, plate sealing and shading, land turning treatment, transplanting, field management and harvesting; the planting method for preventing and treating the tobacco root-knot nematode can effectively kill the root-knot nematode by utilizing an electric shock method, can realize large-area pest killing, can greatly improve the prevention and treatment efficiency and the prevention and treatment effect of the root-knot nematode pest damage, can prevent mosaic diseases by electric shock treatment, can greatly promote the growth condition of tobacco leaves after electric shock treatment, is higher than the existing chemical treatment mode and biological treatment mode in terms of growth or leaf width, length, leaf number and plant height of the tobacco leaves, and cannot cause any pollution to the environment by the electric shock treatment mode, so that the planting method is economical and environment-friendly. Is suitable for being popularized in the field of tobacco planting.
Description
Technical Field
The invention relates to the field of tobacco planting, in particular to a planting method for preventing and controlling tobacco root-knot nematodes.
Background
The tobacco root knot nematode disease is caused by the invasion of root knot nematodes into the roots of tobacco plants. The genus nematoda, class nematoda, order basidioidea, superfamily, family xenodermaceae, genus Meloidogyne. The root-knot nematode overwinter in the tobacco stumps or stumps of other hosts in the soil. When the ground temperature reaches more than 10 ℃ in spring, the larvae are hatched into first instar larvae one by one, when the temperature is 12 ℃, the molting is second instar larvae, and the larvae begin to infect at the temperature of 13-15 ℃. The tumors of the field tobacco plant increase in the late 5 th month, and enter the prime stage of infection damage from the middle 6 th month to the early 7 th month. Generally, the disease is serious in drought years and is slight in rainy years. Mountain land is more serious than farmland. The traditional method for killing the tobacco root-knot nematodes by fumigating soil with a drop mixture has low efficiency, is not beneficial to large-area killing of the nematodes, has pollution to the environment, has certain toxicity to constructors and is not environment-friendly; at present, paecilomyces lilacinus biological agents can be used for preventing and treating, but drug resistance can be generated by using one method singly.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a planting method for preventing and treating tobacco root-knot nematodes, which has good effect of preventing and treating the root-knot nematodes, high efficiency, economy and environmental protection.
The technical scheme adopted by the invention for solving the technical problems is as follows: the planting method for preventing and treating tobacco root-knot nematodes comprises the following steps:
A. selecting seeds and raising seedlings; selecting a land block with a horizontal ground as a nursery, raking the nursery, building an arched shed on the nursery, building a seedling culture pond in the arched shed, containing water in the seedling culture pond, adding nutrient solution into the water, arranging a seedling culture tray in the seedling culture pond, floating the seedling culture tray in the seedling culture pond, containing a substrate in the seedling culture tray, and placing the selected tobacco seeds in the seedling culture tray for seedling culture treatment;
B. sealing disc shading; sealing the seedling tray by using a cover film after the tobacco seedlings grow out, carrying out tray sealing shading treatment, carrying out flat beating, leaf cutting and seedling adjusting, starting to gradually cut off water and fertilizer for hardening the seedlings 10-15 days before transplanting, and gradually removing the cover film until the cover film is completely removed during transplanting;
C. turning the soil; deeply ploughing the tobacco-planted land once, removing weeds and residual root systems of first-season crops, broadcasting 100 hundred million/g lilac paecilomyces lilacinus according to 2000 g/mu, ridging the tobacco-planted land, and performing electric shock treatment on each ridge after ridging, wherein the specific method for electric shock treatment comprises the following steps: inserting a positive electrode and a negative electrode into two ends of each ridge respectively, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for 10 seconds after power off, and then electrifying the positive electrode and the negative electrode for 30 seconds for the second time, wherein the current between the positive electrode and the negative electrode is 300mA during the two times of electrification;
D. transplanting: when tobacco seedlings in a nursery grow to 7-8 true leaves, the stem height is 10-15cm and the stem circumference is 1.8-2.5cm, covering a layer of black film on the surface of the tobacco-planted land, and then transplanting the seedlings into the tobacco-planted land covered with the black film, wherein the transplanting amount per mu is 1100 plants/mu;
E. field management: performing electric shock treatment on each ridge of tobacco 7 days after seedling transplantation, wherein the specific method of electric shock treatment comprises the following steps: respectively inserting a positive electrode and a negative electrode at two ends of each ridge of tobacco, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for the second time after powering off for 10 seconds, and during electrifying for the second time, the current between the positive electrode and the negative electrode is 300 mA;
when the plant height of the tobacco plant is more than 30cm and 12-16 tobacco leaves are planted, electric shock treatment is carried out on each ridge of tobacco, and the specific method of the electric shock treatment is as follows: respectively inserting a positive electrode and a negative electrode at two ends of each ridge of tobacco, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for the second time after powering off for 10 seconds, electrifying the positive electrode and the negative electrode for three times after powering off for 10 seconds, and lasting for 30 seconds, wherein the current between the positive electrode and the negative electrode is 300mA when electrifying for three times;
F. harvesting; and (5) harvesting after the tobacco leaves are mature.
Further, in the step A, before seedling culture, the selected tobacco seeds are dried in the sun at 15-20 ℃ for 2-3 days.
Further, in step a, the arched shed has a height of 1.8 m, a width of 3 m and a length of 11.2 m.
Further, in the step A, the seedling raising pond is built into a rectangle by adopting cement bricks, and a black film is laid at the bottom of the seedling raising pond.
Further, in the step A, the matrix contained in the seedling-raising tray and the matrix contained in the seedling-raising tray are disinfected before use.
Further, in the step C, after ridging, each ridge is humidified before each ridge is subjected to electric shock treatment, and the soil humidity of each ridge is 75-85%.
Further, in the step E, humidifying each ridge before performing electric shock treatment on tobacco of each ridge 7 days after seedling transplantation, wherein the soil humidity of each ridge is 75-85%; when the plant height of tobacco plants is more than 30cm and 12-16 tobacco leaves are planted, humidifying each ridge before electric shock treatment is carried out on each ridge of tobacco, and the soil humidity of each ridge is 75-85%.
The invention has the beneficial effects that: the planting method for preventing and treating the tobacco root-knot nematodes utilizes an electric shock method to prevent and treat the root-knot nematodes, can effectively kill the root-knot nematodes by utilizing the electric shock method, can also realize large-area deinsectization, can greatly improve the prevention and treatment efficiency and the prevention and treatment effect of the root-knot nematode pests, can prevent mosaic diseases by adopting the electric shock treatment, can greatly promote the growth condition of tobacco leaves after adopting the electric shock treatment, and has no pollution to the environment regardless of the growth condition or the width, the length, the number and the plant height of the leaves of the tobacco leaves higher than those of the conventional chemical treatment mode and the conventional biological treatment mode.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The planting method for preventing and treating tobacco root-knot nematodes comprises the following steps: firstly, selecting seeds and raising seedlings; selecting a land block with a horizontal ground as a nursery, harrowing the nursery, building an arched shed on the nursery, wherein the arched shed is 1.8 m high, 3 m wide and 11.2 m long, building a seedling culture pond in the arched shed, the seedling culture pond is built into a rectangle by cement bricks, a black film is laid at the bottom of the seedling culture pond, water is contained in the seedling culture pond, nutrient solution is added in the water, a seedling culture tray is arranged in the seedling culture pond, the seedling culture tray floats in the seedling culture pond, a substrate is contained in the seedling culture tray, the substrate contained in the seedling culture tray and the substrate contained in the seedling culture tray are sterilized before use, the selected tobacco seeds are placed in the seedling culture tray for seedling culture, and in order to improve the germination rate of the seeds, the selected tobacco seeds are dried in the sun at 15-20 ℃ for 2-3 days before seedling culture; sealing the seedling tray by using a cover film after the tobacco seedlings grow out, carrying out tray sealing shading treatment, carrying out flat beating, leaf cutting and seedling adjusting, starting to gradually cut off water and fertilizer for hardening the seedlings 10-15 days before transplanting, and gradually removing the cover film until the cover film is completely removed during transplanting; then, turning over the ground; deeply ploughing the tobacco-planted land once to remove weeds and residual root systems of first-season crops, broadcasting 100 hundred million/g lilac paecilomyces lilacinus according to 2000 g/mu, then ridging the tobacco-planted land, and performing electric shock treatment on each ridge after ridging, wherein in order to ensure that the electric shock treatment effect is optimal, humidification treatment is performed on each ridge before electric shock treatment is performed on each ridge after ridging, the soil humidity of each ridge is 75-85%, and the preferable soil humidity of each ridge is 80%; the specific method of shock treatment is as follows: inserting a positive electrode and a negative electrode into two ends of each ridge respectively, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for 10 seconds after power off, and then electrifying the positive electrode and the negative electrode for 30 seconds for the second time, wherein the current between the positive electrode and the negative electrode is 300mA during the two times of electrification; when tobacco seedlings in a nursery grow to 7-8 true leaves, the stem height is 10-15cm and the stem circumference is 1.8-2.5cm, covering a layer of black film on the surface of the tobacco-planted land, and then transplanting the seedlings into the tobacco-planted land covered with the black film, wherein the transplanting amount per mu is 1100 plants/mu; performing electric shock treatment on each ridge of tobacco 7 days after seedling transplantation, and in order to ensure that the electric shock treatment effect is optimal, humidifying each ridge before performing electric shock treatment on each ridge of tobacco 7 days after seedling transplantation, wherein the soil humidity of each ridge is 75-85%; the soil humidity of each ridge is preferably 80%; the specific method of shock treatment is as follows: respectively inserting a positive electrode and a negative electrode at two ends of each ridge of tobacco, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for the second time after powering off for 10 seconds, and during electrifying for the second time, the current between the positive electrode and the negative electrode is 300 mA; when the plant height of the tobacco plant is more than 30cm and 12-16 tobacco leaves are used, carrying out electric shock treatment on each ridge of tobacco, and when the plant height of the tobacco plant is more than 30cm and the tobacco leaves are 12-16, carrying out humidification treatment on each ridge before carrying out electric shock treatment on each ridge of tobacco, wherein the soil humidity of each ridge is 75-85%; the soil humidity of each ridge is preferably 80%; the specific method of shock treatment is as follows: respectively inserting a positive electrode and a negative electrode at two ends of each ridge of tobacco, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for the second time after powering off for 10 seconds, electrifying the positive electrode and the negative electrode for three times after powering off for 10 seconds, and lasting for 30 seconds, wherein the current between the positive electrode and the negative electrode is 300mA when electrifying for three times; the electric shock method can effectively kill the root-knot nematodes, can also realize large-area killing, can greatly improve the control efficiency and control effect of the root-knot nematode pests, can prevent mosaic diseases by electric shock treatment, can greatly promote the growth condition of the tobacco leaves after electric shock treatment, is higher than the existing chemical treatment mode and biological treatment mode in terms of growth or leaf width, length, leaf number and plant height of the tobacco leaves, does not cause any pollution to the environment, and is economical and environment-friendly; other conventional operations of field management are executed according to the scheme of tobacco field management standard of Liangshan mountain; and (5) harvesting after the tobacco leaves are mature.
Examples
A. Selecting seeds and raising seedlings; selecting a land block with a horizontal ground as a nursery, harrowing the nursery, building an arched shed on the nursery, wherein the arched shed is 1.8 m high, 3 m wide and 11.2 m long, building a seedling culture pond in the arched shed, the seedling culture pond is built into a rectangle by adopting cement bricks, a black film is laid at the bottom of the seedling culture pond, water is contained in the seedling culture pond, nutrient solution is added in the water, a seedling culture tray is arranged in the seedling culture pond, the seedling culture tray floats in the seedling culture pond, matrix is contained in the seedling culture tray, the matrix contained in the seedling culture tray and the matrix contained in the seedling culture tray are sterilized before use, and selected tobacco seeds are placed in the seedling culture tray for seedling culture;
B. sealing disc shading; sealing the seedling tray by using a cover film after the tobacco seedlings grow out, carrying out tray sealing shading treatment, carrying out flat beating, leaf cutting and seedling adjusting, starting to gradually cut off water and fertilizer for hardening the seedlings 10-15 days before transplanting, and gradually removing the cover film until the cover film is completely removed during transplanting;
C. turning the soil; deeply ploughing the tobacco-planted land once, removing weeds and residual root systems of first-season crops, broadcasting 100 hundred million/g lilac paecilomyces lilacinus according to 2000 g/mu, and ridging the tobacco-planted land;
D. transplanting: when tobacco seedlings in a nursery grow to 7-8 true leaves, the stem height is 10-15cm and the stem circumference is 1.8-2.5cm, covering a layer of black film on the surface of the tobacco-planted land, and then transplanting the seedlings into the tobacco-planted land covered with the black film, wherein the transplanting amount per mu is 1100 plants/mu;
E. field management: the method is implemented according to the scheme of tobacco field management standard of Liangshan mountain; root-knot nematode pest control;
F. harvesting; and (5) harvesting after the tobacco leaves are mature.
Setting four experimental groups, wherein the parameters of the other steps are the same except for different treatment modes of root-knot nematode pest control in the four experimental groups;
wherein the treatment mode of the experimental group T1 for preventing and treating the root-knot nematode pests is electric shock treatment, which is specifically as follows: every ridge all carries out electric shock treatment after the ridging, carries out humidification treatment to every ridge earlier before all carrying out electric shock treatment to every ridge after the ridging, and the soil moisture of every ridge is 80%, and the concrete method of electric shock treatment is as follows: inserting a positive electrode and a negative electrode into two ends of each ridge respectively, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for 10 seconds after power off, and then electrifying the positive electrode and the negative electrode for 30 seconds for the second time, wherein the current between the positive electrode and the negative electrode is 300mA during the two times of electrification; carrying out electric shock treatment on tobacco in each ridge 7 days after seedling transplantation, humidifying each ridge before carrying out electric shock treatment on tobacco in each ridge 7 days after seedling transplantation, wherein the soil humidity of each ridge is 80%, and the specific method of electric shock treatment comprises the following steps: respectively inserting a positive electrode and a negative electrode at two ends of each ridge of tobacco, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for the second time after powering off for 10 seconds, and during electrifying for the second time, the current between the positive electrode and the negative electrode is 300 mA; when the plant height of a tobacco plant is more than 30cm and 12-16 tobacco leaves are available, carrying out electric shock treatment on each ridge of tobacco, and when the plant height of the tobacco plant is more than 30cm and 12-16 tobacco leaves are available, carrying out humidification treatment on each ridge before carrying out electric shock treatment on each ridge of tobacco, wherein the soil humidity of each ridge is 80%, and the specific method of electric shock treatment comprises the following steps: respectively inserting a positive electrode and a negative electrode at two ends of each ridge of tobacco, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for the second time after powering off for 10 seconds, electrifying the positive electrode and the negative electrode for three times after powering off for 10 seconds, and lasting for 30 seconds, wherein the current between the positive electrode and the negative electrode is 300mA when electrifying for three times;
the root knot nematode pest control treatment of experimental group T2 was as follows: the existing chemical treatment mode is adopted to prevent and treat the root-knot nematode pests;
the root knot nematode pest control treatment of experimental group T3 was as follows: the existing biological treatment mode is adopted to prevent and treat the root-knot nematode pests;
the experimental group CK is used as a control group, and the root-knot nematode pest is not subjected to any control treatment;
after the experiment, the field growth potential (shown in table 1) was investigated, 10 tobacco plants were randomly selected from each experimental plot by a random sampling method, and the grade of root-knot nematode (shown in table 2), the number of leaves with mosaic disease (shown in table 3), the maximum leaf length (shown in table 4), the maximum leaf width (shown in table 5), the number of leaves (shown in table 6), and the plant height (shown in table 7) were investigated, respectively, and the data of the investigation are shown in the following table:
TABLE 1
| Serial number | Treatment method | Growth potential of field |
| T1 | Electric shock treatment | High strength |
| T2 | Chemical treatment | High strength |
| T3 | Biological treatment | In |
| CK | Blank control | Weak (weak) |
TABLE 2
TABLE 3
TABLE 4
TABLE 5
TABLE 6
TABLE 7
As can be seen from tables 1 to 7, the field growth potentials of the electric shock treatment mode and the chemical treatment mode are stronger, the grades of the root-knot nematodes of the electric shock treatment mode and the chemical treatment mode are lower and are about 1 grade, the leaf number of the mosaic disease, the maximum leaf length, the maximum leaf width, the maximum leaf number of the plant and the plant height of the plant are the lowest after the electric shock treatment method is adopted to carry out the electric shock treatment on the land planted with the tobacco, the severity of the root-knot nematodes is the lowest, the prevention and treatment effects are the best, meanwhile, the electric shock treatment can also prevent the mosaic disease, moreover, after the electric shock treatment is adopted, the growth condition of the tobacco leaves can be greatly promoted, and the leaf width, the length, the leaf number and the plant height of the tobacco leaves are all higher than those of the existing chemical treatment mode and biological treatment mode, and the electric shock treatment mode of the invention does not cause any pollution to the environment, and is economical and environment-friendly.
Claims (7)
1. A planting method for preventing and treating tobacco root-knot nematodes is characterized by comprising the following steps:
A. selecting seeds and raising seedlings; selecting a land block with a horizontal ground as a nursery, raking the nursery, building an arched shed on the nursery, building a seedling culture pond in the arched shed, containing water in the seedling culture pond, adding nutrient solution into the water, arranging a seedling culture tray in the seedling culture pond, floating the seedling culture tray in the seedling culture pond, containing a substrate in the seedling culture tray, and placing the selected tobacco seeds in the seedling culture tray for seedling culture treatment;
B. sealing disc shading; sealing the seedling tray by using a cover film after the tobacco seedlings grow out, carrying out tray sealing shading treatment, carrying out flat beating, leaf cutting and seedling adjusting, starting to gradually cut off water and fertilizer for hardening the seedlings 10-15 days before transplanting, and gradually removing the cover film until the cover film is completely removed during transplanting;
C. turning the soil; deeply ploughing the tobacco-planted land once, removing weeds and residual root systems of first-season crops, broadcasting 100 hundred million/g lilac paecilomyces lilacinus according to 2000 g/mu, ridging the tobacco-planted land, and performing electric shock treatment on each ridge after ridging, wherein the specific method for electric shock treatment comprises the following steps: inserting a positive electrode and a negative electrode into two ends of each ridge respectively, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for 10 seconds after power off, and then electrifying the positive electrode and the negative electrode for 30 seconds for the second time, wherein the current between the positive electrode and the negative electrode is 300mA during the two times of electrification;
D. transplanting: when tobacco seedlings in a nursery grow to 7-8 true leaves, the stem height is 10-15cm and the stem circumference is 1.8-2.5cm, covering a layer of black film on the surface of the tobacco-planted land, and then transplanting the seedlings into the tobacco-planted land covered with the black film, wherein the transplanting amount per mu is 1100 plants/mu;
E. field management: performing electric shock treatment on each ridge of tobacco 7 days after seedling transplantation, wherein the specific method of electric shock treatment comprises the following steps: respectively inserting a positive electrode and a negative electrode at two ends of each ridge of tobacco, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for the second time after powering off for 10 seconds, and during electrifying for the second time, the current between the positive electrode and the negative electrode is 300 mA;
when the plant height of the tobacco plant is more than 30cm and 12-16 tobacco leaves are planted, electric shock treatment is carried out on each ridge of tobacco, and the specific method of the electric shock treatment is as follows: respectively inserting a positive electrode and a negative electrode at two ends of each ridge of tobacco, wherein the depth of the positive electrode and the negative electrode inserted into the ground is 30cm, firstly electrifying the positive electrode and the negative electrode for 30 seconds for the first time, then electrifying the positive electrode and the negative electrode for the second time after powering off for 10 seconds, electrifying the positive electrode and the negative electrode for three times after powering off for 10 seconds, and lasting for 30 seconds, wherein the current between the positive electrode and the negative electrode is 300mA when electrifying for three times;
F. harvesting; and (5) harvesting after the tobacco leaves are mature.
2. The planting method for controlling tobacco root-knot nematodes according to claim 1, wherein the planting method comprises the following steps: in the step A, before seedling culture, the selected tobacco seeds are dried in the sun at 15-20 ℃ for 2-3 days.
3. The planting method for controlling tobacco root-knot nematodes according to claim 1, wherein the planting method comprises the following steps: in step A, the arched shed is 1.8 meters high, 3 meters wide and 11.2 meters long.
4. The planting method for controlling tobacco root-knot nematodes according to claim 1, wherein the planting method comprises the following steps: in the step A, the seedling raising pond is built into a rectangle by adopting cement bricks, and a black film is laid at the bottom of the seedling raising pond.
5. The planting method for controlling tobacco root-knot nematodes according to claim 1, wherein the planting method comprises the following steps: in the step A, the seedling-raising tray and the matrix contained in the seedling-raising tray are disinfected before use.
6. The planting method for controlling tobacco root-knot nematodes according to claim 1, wherein the planting method comprises the following steps: in the step C, after ridging, each ridge is humidified before being subjected to electric shock treatment, and the soil humidity of each ridge is 75-85%.
7. The planting method for controlling tobacco root-knot nematodes according to claim 1, wherein the planting method comprises the following steps: in the step E, humidifying each ridge before performing electric shock treatment on each ridge of tobacco 7 days after seedling transplantation, wherein the soil humidity of each ridge is 75-85%; when the plant height of tobacco plants is more than 30cm and 12-16 tobacco leaves are planted, humidifying each ridge before electric shock treatment is carried out on each ridge of tobacco, and the soil humidity of each ridge is 75-85%.
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