CN118696758A - Black shank disease prevention and control method for tobacco planting using integrated water, fertilizer and pesticide - Google Patents

Abstract

The application discloses a method for preventing and controlling a water-fertilizer-pesticide integrated black shank for tobacco planting, which comprises the following steps: 1) After 3 days of tobacco seedling transplanting, each plant is firstly dripped with 300-500 ml of clear water, when 95-105 kg of clear water is left in a liquid storage tank, the tobacco seedling is weighed according to 95-105 g/mu of 68% of refined methyl-zinc-manganese-zinc and 495-505 g/mu of urea, and the tobacco seedling is diluted with water after mixing; 2) After 15 days of transplanting, use N: the mass ratio of P ₂O₅：K₂ O is 15:16:25, wherein the concentration of the diluted water-soluble fertilizer is 0.5-1.0% to prepare nutrient solution; 3) After transplanting for 30-35 days, firstly, a nutrient solution of 10-20 times liquid is prepared by using 95-105 g of 0.1% medium trace element fertilizer and 5000 g of potassium sulfate per mu for drip irrigation, and when 95-105 kg of nutrient solution in a liquid storage tank is remained, 80% dimethomorph is diluted with water according to 15-20 g per mu and then drip irrigation is carried out. The method can improve the root system activity, promote the medicine absorption, reduce the operation, facilitate the administration and reduce the labor cost, has obvious prevention effect after being used in a field environment, and is particularly suitable for continuous cropping soil.

Description

Black shank disease prevention and control method for tobacco planting using integrated water, fertilizer and pesticide

Technical Field

The present application relates to the technical field of tobacco planting, and in particular to a method for preventing and controlling black shank disease in tobacco planting using integrated water, fertilizer and pesticide.

Background Art

The drip irrigation and fertilizer integration technology uses the drip irrigation system to dissolve fertilizer in the irrigation water, completes fertilization while watering, and adjusts the irrigation system to control the timing of fertilization and watering, so as to meet the crop's demand for water and nutrients in a timely and appropriate manner, and realizes water-saving and fertilizer-saving production technology that realizes synchronous management of water and fertilizer and efficient use of water and nutrients. Compared with traditional fertilization and irrigation measures, it has significant advantages such as saving water, fertilizer, and time, reducing agricultural costs, reducing environmental pollution, improving soil microenvironment, and improving fertilizer use efficiency.

However, the drip irrigation and fertilizer integration system used in the existing flue-cured tobacco planting requires additional devices and spraying systems to achieve the prevention and control of diseases and insect pests.

Tobacco black shank is a soil-borne disease that is common and causes serious damage to tobacco. It has the characteristics of rapid spread and difficulty in control. With the influence of global climate change, changes in cultivation methods and continuous cropping, the proportion of black shank damage has increased year by year, and it often occurs in combination with soil-borne diseases such as root black rot, bacterial wilt, and rhizosphere nematode disease, aggravating the damage and making prevention and control difficult, which seriously threatens the sustainable development of tobacco. The root black rot pathogen mainly lives in the environment at a depth of 0 to 5 cm on the soil surface.

At present, the prevention and control of black shank in tobacco production mainly relies on root irrigation of chemical pesticides 3 to 4 times. The main drugs used are metalaxyl mancozeb, oxadiazine wettable powder, and oxadiazine mancozeb wettable powder. Most of these drugs are applied to the roots, which is cumbersome to operate. A large amount of drugs are applied through root irrigation, which not only has high labor costs, but also applies drugs to the soil through root irrigation. However, after root irrigation, the liquid infiltrates to a great depth, stays on the soil surface for a short time, and has a short effect time. Therefore, it is mainly used to apply drugs to deep roots, and cannot perform long-term drug infiltration on the surface soil with a high content of black shank, affecting the prevention and control effect of root rot. It will also destroy the balance of bacterial flora in the deep soil, increase soil compaction, and affect the planting effect of continuous cropping soil.

For example, the method for preventing and controlling tobacco black shank disclosed in CN201310123169.1 transplants grade 1 to 2 diseased plants to an area with better soil conditions, first applies fertilizer, then irrigates the roots with dimethomorph wettable powder, sprays potassium dihydrogen phosphate solution on the leaves again, and then irrigates the roots with oxazolidinone manganese zinc wettable powder. However, this method is cumbersome, time-consuming and labor-intensive, and only treats a single grade 1 to 2 diseased plant. In addition, the planting soil needs to be replaced, which cannot be achieved in a large-scale planting environment. Therefore, this method cannot be applied to the effective prevention and control of black shank in a field environment.

As the damage caused by black shank disease becomes more serious, the use of chemical agents is also increasing year by year, and the risk of excessive pesticide residues in tobacco leaves and the resistance of pathogens to commonly used pesticides are both on the rise.

At the same time, black shank disease is more likely to live in tobacco-planted soil. The incidence rate of black shank disease in tobacco plants planted on this type of soil is much higher than that in other rotation soils. Moreover, after an outbreak, prevention and control is difficult and the prevention and control effect is poor. Currently, prevention and control is mostly achieved by increasing the number of spraying times. Increasing the number of spraying chemical pesticides will cause excessive pesticide residues in tobacco leaves, affecting the harvest and tobacco leaf quality.

The information disclosed in the background technology section is only intended to enhance the understanding of the overall background of the invention and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

Summary of the invention

In response to the above technical problems, the present application provides a method for the prevention and control of black shank disease in tobacco planting using an integrated water, fertilizer and pesticide combination. The method applies pesticides while drip irrigation and watering. The method can improve root activity, promote drug absorption, reduce operations, facilitate drug administration and reduce labor costs. The method has significant prevention effects after use in a field environment and is particularly suitable for continuously cropped soils.

The present application provides a method for preventing and controlling black shank disease in tobacco planting using integrated water, fertilizer and pesticide, comprising the following steps:

1) Three days after transplanting tobacco seedlings, drip 300-500 ml of clean water on each plant. When there is 95-105 kg of clean water left in the liquid storage tank, weigh 95-105 g/mu of fine carbendazim·manganese zinc and 495-505 g/mu of urea, mix and dilute with water to obtain a dilution. Add the dilution to the liquid storage tank, stir evenly, and drip irrigate at 95-105 ml per plant.

2) 15 days after transplanting, dilute the water-soluble fertilizer with water to obtain a nutrient solution with a water-soluble fertilizer concentration of 0.5-1.0%, and add mineral potassium humate to the nutrient solution at 1000 g/mu. Use the nutrient solution for drip irrigation, dripping 500ml-1000ml per plant;

After that, when there is 95-105kg of nutrient solution left in the storage tank, add fully dissolved live Bacillus subtilis inoculant at 55-65g/mu, and drip irrigate 95-105ml per plant;

3) 30 to 35 days after transplanting, first apply 95 to 105 g of 0.1% trace element fertilizer and 5000 g of potassium sulfate per mu to prepare a 10 to 20 times diluted nutrient solution for drip irrigation. When there are 95 to 105 kg of nutrient solution left in the storage tank, dilute 15 to 20 g of oxadiazine per mu with water, add the diluted solution into the storage tank, stir evenly, and drip irrigate at 95 to 105 ml per plant.

The method firstly applies protective preventive medicine to the transplanted seedlings in the field 3 days after transplanting, according to the fertilizer made of fine carbuncle, manganese zinc and urea per mu, to protect the young roots of the tobacco seedlings from being infected, and applies the pesticides while the tobacco plants are growing, so as to better promote the growth of the roots and improve the activity of the roots. The method can reduce the amount of pesticides used and obtain better prevention effect, thereby avoiding pesticide residues, reducing labor and improving production efficiency.

Preferably, the live Bacillus subtilis inoculant contains more than 100 billion live spores/g.

Preferably, fertilize 5 days after transplanting: dilute water-soluble fertilizer with water to a mass concentration of 0.2-0.5%, and drip irrigate with 500ml-1000ml of the dilution per plant. This period is to supply sufficient nitrogen, phosphorus and potassium fertilizers to promote root growth and plant development.

Preferably, fertilization is performed 10 days after transplanting: water-soluble fertilizer is diluted with water to a dilution with a mass concentration of 0.2-0.5%, and the obtained dilution is drip-irrigated at 500ml-1000ml per plant.

Preferably, fertilization is performed 20 days after transplanting: water-soluble fertilizer is diluted with water to a dilution with a mass concentration of 0.5-1.0%, and the obtained dilution is drip-irrigated at 500ml-1000ml per plant.

Preferably, the spacing between transplanted tobacco plants is 45 to 55 cm.

Preferably, a drip irrigation tape is laid between the tobacco plants; the liquid storage tank is connected to the drip irrigation tape pipeline, and a drip irrigation delivery pump is arranged on the pipeline connecting the liquid storage tank and the drip irrigation tape; the drip irrigation tape is laid between the tobacco plants, and a plurality of drippers are arranged on the drip irrigation tape at intervals of 25 to 35 cm.

Preferably, the mancozeb is a mancozeb with a concentration of 68%; and the dimethoate is a mancozeb with a concentration of 80%.

Preferably, the tobacco plants are transplanted into a field where tobacco has been grown continuously for 6 to 7 years.

Preferably, 5 days after transplanting, 10 days after transplanting, or 20 days after transplanting, the water-soluble fertilizer used is a water-soluble fertilizer having a mass ratio of N:P ₂ O ₅ :K ₂ O of 15:16:25.

Preferably, the mass ratio of N:P ₂ O ₅ :K ₂ O in the water-soluble fertilizer in step 2) is 15:16:25.

The beneficial effects of this application include:

1) The application provides a method for controlling black shank disease in tobacco planting using an integrated water, fertilizer and pesticide system. The method makes full use of the characteristics of the onset of black shank disease: tobacco black shank pathogens mainly grow in the soil layer at a depth of 0 to 5 cm; they mainly infect the roots and stem bases of tobacco plants, and the disease-susceptible stage is from seedling to bud formation. The flue-cured tobacco drip irrigation system is used to provide the nutrients required for flue-cured tobacco growth while accurately delivering the drug for controlling black shank disease to the main activity area and infection area of the black shank pathogens, effectively protecting the soil environment around the diseased part of the tobacco plant, reducing the amount of bacteria in the soil in this area, and increasing the duration of drug efficacy.

2) The present application provides a method for the prevention and control of black shank disease in tobacco planting using an integrated water, fertilizer and pesticide combination. In this method, water and fertilizer management is performed on tobacco plants during a specific period to effectively improve the root development of the plants before pesticide application and increase root activity. Preventive root protection with urea is performed using a combination of armor frost and manganese zinc. This protects the roots of transplanted young tobacco seedlings from bacterial infection while promoting the absorption and utilization of nutrients and drugs by the roots, which is beneficial for the subsequent drip irrigation of the tobacco plants as a whole to improve the prevention effect.

3) The application provides a method for the prevention and control of black shank disease in tobacco planting using integrated water, fertilizer and pesticide. This method uses a nutrient solution to simultaneously apply a live Bacillus subtilis inoculant 15 days after transplanting to improve the microbial flora in the soil environment around the plant, strengthen the effect of early protective medication, avoid re-infection of black shank disease pathogens in the continuous cropping soil, and consolidate the prevention and control effect. The live Bacillus subtilis inoculant is a biological inoculant, and although its prevention effect is not as good as that of a chemical pesticide inoculant, this method is used in combination with other chemical pesticides to achieve a better prevention effect.

4) The application provides a method for controlling black shank disease in tobacco planting using integrated water, fertilizer and medicine. This method drips dimethoate together with the nutrient solution 30 to 35 days after transplanting to further consolidate the prevention effect and increase the duration of the tobacco drug efficacy. At the same time, this method can reduce the use of chemical pesticides and synergistically produce better results.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of a method for controlling black shank disease in tobacco planting using integrated water, fertilizer and pesticide in at least one embodiment provided by the present application;

FIG2 is a schematic diagram of a field photo of Comparative Example 1 provided in the present application;

DETAILED DESCRIPTION

The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention fall within the protection scope of the present invention.

Example

Unless otherwise specified, the materials and instruments used in the following examples were obtained from commercial channels; the detection methods used were all existing methods unless otherwise specified.

Example 1

1. Transplant tobacco seedlings in the field at a spacing of 50 cm between tobacco plants, lay drip irrigation tapes between tobacco plants, install multiple drippers on the drip irrigation tapes, and the dripper spacing is 30 cm; before transplanting, take 20% of the total fertilization amount of base fertilizer for ring application in the pond, and the fertilizer is tobacco-specific fertilizer, and the nitrogen, phosphorus and potassium ratio in the fertilizer is N: P ₂ O ₅ : K ₂ O mass ratio is 15:15:18. In this embodiment, Yunyan 78 is planted, and the total fertilizer amount is 6 kg;

2. On the third day after transplanting tobacco seedlings, drip 400 ml of clean water on each plant. When there is 95-105 kg of clean water left in the storage tank, take medicine and fertilizer according to the dosage of 68% carbendazim·mancozeb 100 g/mu + urea 500 g/mu, mix and dilute with water to fully dissolve, and get the diluted solution. Add the diluted solution into the storage tank, stir evenly, and drip irrigation at 100 ml per plant.

3. On the 5th day after transplanting, use water-soluble fertilizer with _a mass ratio of N: _P2O5 : _K2O of 15:16:25 per acre. The concentration of the water-soluble fertilizer after dilution is 0.5%. Add 600 ml per plant into the storage tank for drip irrigation.

4. On the 10th day after transplanting, use water-soluble fertilizer with a mass ratio of N: _P2O5 : _K2O of 15:16:25 per mu. The concentration of the water-soluble fertilizer after dilution is 0.5%. Add 700 _ml per plant into the storage tank for drip irrigation.

5. On the 15th day after transplanting, use water-soluble fertilizer with a mass ratio of N: _P2O5 : _K2O of 15:16:25 _. The concentration of the diluted water-soluble fertilizer is 0.5-1.0%. At the same time, add mineral potassium humate at 1000 g/mu, and drop 800 ml for each plant.

When there are 95-105kg of nutrient solution left in the storage tank, add fully dissolved live Bacillus subtilis inoculant (containing 100 billion live spores/g) at 60g/mu, and drop 100ml for each plant.

6. On the 20th day after transplanting, tobacco plants begin to enter a period of vigorous growth and require a large amount of nutrients. Use water-soluble fertilizer with a mass ratio of N: _P2O5 : _K2O of 15:16:25 per acre. The concentration of the diluted water-soluble fertilizer is 0.5-1.0% _, and 800 ml is dropped on each plant.

7. On the 32nd day after transplanting, prepare a 17-fold diluted nutrient solution with 100g of 0.1% trace element fertilizer + 5000g of potassium sulfate per mu, and then drip irrigate. When there are 95-105kg of nutrient solution left in the storage tank, dilute 80% methacrylate with 1kg of water at a dosage of 20g per mu and fully dissolve it. Then add the diluted solution into the storage tank, stir evenly, and then drip irrigate, 100ml per plant.

Comparative Example 1

The difference from Example 1 is that: the root irrigation method is adopted to prepare 4000 dilutions of 100 g/mu of Jinjiashuang·Mancozeb 3 days after transplanting, 10000 dilutions of 60 g/mu of live Bacillus subtilis inoculant 15 days after transplanting, and 20000 dilutions of 30 g/mu of oxadiazine 35 days after transplanting for root irrigation control.

Blank comparison ratio:

The difference from Example 1 is that no pesticide is used for prevention and control, and only water and fertilizer management operations are performed.

Implementation effect:

In Xinluo Village Committee, Donghua Town, Chuxiong City, Yunnan Province, tobacco fields with tobacco plants continuously planted for 6 years were selected for planting. Tobacco planting was carried out according to the methods of Example 1, Comparative Example 1 and the blank example, and the number of diseased plants, the cost of prevention and control, and the number of times chemical pesticides were used were counted. The results of Example 1, Comparative Examples 1 to 3 and the blank control example are listed in Table 1.

100 tobacco leaves in each of the embodiments, comparative examples and blank examples were selected, and the pesticide residue contents of carbendazim, mancozeb and dimethomorph in each sample were measured, and the average values were taken. The results are listed in Table 1. The pesticide residue detection was carried out according to the standard of LC-MS/MS method (YQ/T47.2-2015 Determination of multiple pesticide residues in tobacco and tobacco products Part 2: Liquid chromatography-tandem mass spectrometry).

Table 1

After implementing the method disclosed in Example 1, a good control effect was achieved, with a control effect of 81.04%, which was 20.15% higher than the existing foliar spraying control effect disclosed in the comparative example. The risk of pesticide residues in tobacco leaves was reduced, the labor cost of using drugs was saved, and the economic benefits of tobacco farmers were significantly improved. At the same time, the method can effectively reduce pesticide residues in tobacco leaves. After testing, the pesticide residue amount of tobacco leaves planted by this method is lower than the national standard, and is also lower than the existing root irrigation control method.

The dosage of the drug used in the method provided by the present application is not effective in preventing and treating black shank disease by using the existing root irrigation method.

The tobacco plants planted in Example 1 are shown in FIG1 . The tobacco plants grow well without obvious disease spots, and the control effect is good.

As shown in FIG. 2 , the tobacco plants sprayed with the foliar spray in Comparative Example 1 had poor growth, obvious leaf spots, and a high mortality rate of transplanted tobacco seedlings.

Example 2

The difference from Example 1 is:

1) The spacing between transplanted tobacco plants is 45 cm, and the spacing between drippers on the drip irrigation belt is 25 cm;

Three days after transplanting tobacco seedlings, drip 300ml of clean water on each plant. When there is 105kg of clean water left in the liquid storage tank, weigh 105g/mu of fine carbendazim·manganese zinc and 505g/mu of urea, mix and dilute with water to obtain a dilution. Add the dilution to the liquid storage tank, stir evenly, and drip 95ml per plant.

Fertilize 5 days after transplanting: dilute the water-soluble fertilizer with water to a mass concentration of 0.2%, and drip irrigate with 500 ml of the diluted solution per plant.

Fertilize 10 days after transplanting: dilute the water-soluble fertilizer with water to a mass concentration of 0.2%, and drip irrigate with 500 ml of the diluted solution per plant.

2) 15 days after transplanting, dilute the water-soluble fertilizer with water to obtain a nutrient solution with a water-soluble fertilizer concentration of 0.5%, and add mineral potassium humate to the nutrient solution at 1000 g/mu. Use the nutrient solution for drip irrigation, dripping 1000 ml per plant;

After that, when there is 105kg of nutrient solution left in the storage tank, add fully dissolved live Bacillus subtilis inoculant at 55g/mu, and drip 105ml per plant;

Fertilize 20 days after transplanting: dilute the water-soluble fertilizer with water to a mass concentration of 1.0%, and drip irrigate with 1000 ml of the diluted solution per plant.

3) On the 30th day after transplanting, first apply 105g of 0.1% trace element fertilizer and 5000g of potassium sulfate per mu to prepare a 20-fold diluted nutrient solution for drip irrigation. When there is 95kg of nutrient solution left in the storage tank, dilute 15g of methacryloylmorph with water per mu, add the diluted solution into the storage tank, stir evenly, and drip irrigate at 95ml per plant.

Example 3

The difference from Example 1 is:

1) The spacing between transplanted tobacco plants is 55 cm, and the spacing between drippers on the drip irrigation belt is 35 cm;

On the fourth day after transplanting tobacco seedlings, drip 500 ml of clean water on each plant. When there is 95 kg of clean water left in the liquid storage tank, weigh 95 g/mu of fine carbendazim·manganese zinc and 495 g/mu of urea, mix and dilute with water to obtain a dilution. Add the dilution to the liquid storage tank, stir evenly, and drip 105 ml per plant.

Fertilize 5 days after transplanting: dilute the water-soluble fertilizer with water to a mass concentration of 0.5%, and drip irrigate with 1000 ml of the diluted solution per plant.

Fertilize 10 days after transplanting: dilute the water-soluble fertilizer with water to a mass concentration of 0.5%, and drip irrigate with 1000 ml of the diluted solution per plant.

2) 15 days after transplanting, dilute the water-soluble fertilizer with water to obtain a nutrient solution with a water-soluble fertilizer concentration of 1.0%, and add mineral potassium humate to the nutrient solution at 1000 g/mu. Use the nutrient solution for drip irrigation, dripping 500 ml per plant;

After that, when there is 95kg of nutrient solution left in the storage tank, add 65g/mu of fully dissolved Bacillus subtilis live bacteria agent, and drip 95ml per plant;

Fertilize 20 days after transplanting: dilute the water-soluble fertilizer with water to a mass concentration of 0.5%, and drip irrigate with 500 ml of the diluted solution per plant.

3) On the 35th day after transplanting, first apply 95g of 0.1% trace element fertilizer and 5000g of potassium sulfate per mu to prepare a 10-fold diluted nutrient solution for drip irrigation. When there is 105kg of nutrient solution left in the storage tank, dilute 20g of methacryloylmorph with water per mu, add the diluted solution into the storage tank, stir evenly, and drip irrigate at 105ml per plant.

Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A method for preventing and controlling the black shank by integrating water, fertilizer and medicine for tobacco planting is characterized by comprising the following steps:

1) 3 days after tobacco seedling transplanting, each plant is firstly dripped with 300-500 ml of clear water, when 95-105 kg of clear water is left in the liquid storage tank, the pure methyl frost, the manganese zinc and the urea are weighed according to 95-105 g/mu and 495-505 g/mu, the pure methyl frost, the manganese zinc, the urea and the urea are diluted with water after mixing to obtain a diluent, the diluent is added into the liquid storage tank, and the diluent is uniformly stirred and is drip-irrigated according to 95-105 ml of each plant;

2) After 15 days of transplanting, diluting the water-soluble fertilizer with water to obtain a nutrient solution with the concentration of 0.5-1.0% of the water-soluble fertilizer, adding mineral source potassium fulvate into the nutrient solution according to 1000 g/mu, and performing drip irrigation by adopting the nutrient solution, wherein each plant is drip-irrigated by 500-1000 ml;

Then when 95-105 kg of nutrient solution in the liquid storage tank is left, adding fully dissolved bacillus subtilis viable bacteria agent according to 55-65 g/mu, and drip irrigation for each strain by 95-105 ml;

3) And (3) at 30-35 days after transplanting, firstly, using 95-105 g of 0.1% medium trace element fertilizer and 5000 g of potassium sulfate to prepare 10-20 times of nutrient solution for drip irrigation, when 95-105 kg of nutrient solution in the liquid storage tank is remained, diluting dimethomorph with 15-20 g of water per mu, adding the diluted solution into the liquid storage tank, uniformly stirring, and drip irrigation according to 95-105 ml of each plant.

2. The method for controlling water, fertilizer and pesticide integrated black shank for tobacco planting according to claim 1, wherein the bacillus subtilis viable bacteria agent contains more than 1000 hundred million viable spores/g.

3. The method for controlling water, fertilizer and pesticide integrated black shank for tobacco planting according to claim 1, wherein the fertilizer is applied after 5 days of transplanting: diluting the water-soluble fertilizer with water to a diluent with the mass concentration of 0.2-0.5%, and performing drip irrigation on the obtained diluent according to 500-1000 ml of each plant.

4. The method for controlling water, fertilizer and pesticide integrated black shank for tobacco planting according to claim 1, wherein the fertilizer is applied after 10 days of transplanting: diluting the water-soluble fertilizer with water to a diluent with the mass concentration of 0.2-0.5%, and performing drip irrigation on the obtained diluent according to 500-1000 ml of each plant.

5. The method for controlling water, fertilizer and pesticide integrated black shank for tobacco planting according to claim 1, wherein the fertilizer is applied after 20 days of transplanting: diluting the water-soluble fertilizer with water to a diluent with the mass concentration of 0.5-1.0%, and performing drip irrigation on the obtained diluent according to 500-1000 ml of each plant.

6. The method for controlling the water, fertilizer and pesticide integrated black shank for tobacco planting according to claim 1, wherein the distance between transplanted tobacco plants is 45-55 cm; laying drip irrigation belts among tobacco plants; the liquid storage tank is communicated with a drip irrigation belt pipeline, and a drip irrigation conveying pump is arranged on the pipeline connecting the liquid storage tank with the drip irrigation belt; the drip irrigation belts are paved between tobacco plants, and a plurality of drippers are arranged on the drip irrigation belts at intervals of 25-35 cm.

7. The method for controlling water, fertilizer and pesticide integrated black shank for tobacco planting according to claim 1, wherein the refined metalaxyl-manganese-zinc is refined metalaxyl-manganese-zinc with concentration of 68%; dimethomorph is dimethomorph with concentration of 80%.

8. The method for controlling water, fertilizer and pesticide integrated black shank for tobacco planting according to claim 1, wherein the tobacco plants are transplanted in a field where tobacco continuous cropping is carried out for 6-7 years.

9. The method for controlling water, fertilizer and pesticide integrated black shank for tobacco planting according to claim 1, wherein the water-soluble fertilizer used is N: the mass ratio of P ₂O₅：K₂ O is 15:16: 25.

10. The method for controlling water-fertilizer-pesticide integrated black shank for tobacco planting according to claim 1, wherein in the water-soluble fertilizer in step 2), N: the mass ratio of P ₂O₅：K₂ O is 15:16:25.