Method for preventing and treating tomato canker of tomato planted in greenhouse

Abstract

The invention relates to a method for preventing and treating tomato canker by planting tomatoes in a greenhouse. The method is characterized by comprising the following steps: 1, breeding a seedling bed soil living bacteria bactericide; 2, sterilizing and disinfecting in the greenhouse; 3, fertilizer, water and pesticide combined prevention and control; 4, repairing, preventing and treating after traumatic farming operation; the method provided by the invention is a systematic and comprehensive method for killing the activity of the tomato canker pathogenic bacteria in the facility greenhouse, does not leave a survival space and an infection opportunity for the pathogenic bacteria, and can effectively prevent and treat the tomato canker in the facility greenhouse; the method has the advantages of improving the tomato quality, increasing the tomato yield, improving the soil environment, saving labor and saving cost, and is an effective method for preventing and treating the tomato canker, which is safe to the environment and low in cost.

Description

Technical Field

[0001] The invention relates to the field of plantation agricultural pest control, and in particular to a method for controlling tomato canker in planted tomatoes in a greenhouse. Background Art

[0002] Tomato canker spreads quickly, and the disease is severe in warm and humid weather. It is easy to get sick when nitrogen fertilizer is applied excessively or flooding is carried out, especially in greenhouses where the loss is greater. It is a devastating disease of tomatoes. At present, one method is to use antibiotic pesticides of the streptomycin sulfate type for prevention and control. However, according to the "Minutes of the Ninth Plenary Session of the Eighth National Pesticide Registration and Review Committee" in the 5th issue of the "World Pesticide" magazine in 2011, page 56, Article 5, "Regarding the safety management of streptomycin sulfate: streptomycin sulfate is a medical antibiotic. In order to reduce the safety risks that may be caused by the use of medical antibiotics in agriculture, the committee members suggested: stop accepting and approving new field trials and pesticide registrations of streptomycin sulfate, and stop renewing the registration of products containing streptomycin sulfate when their registration certificates expire." Therefore, there are no antibiotic pesticides of the streptomycin sulfate type on the market, so the method of controlling tomato canker with streptomycin sulfate, including agricultural streptomycin and streptomycin, is no longer feasible. Another method is to sterilize or coat the seeds with seed coating agents, but the tomato canker pathogen can overwinter inside and outside the seeds and on diseased remains, and can survive in the soil with diseased remains for 2 to 3 years. It can invade through wounds, including damaged leaves and young roots, and can also invade and spread from the stems or pedicels of the plants and re-infect multiple times, causing the disease to rapidly worsen and spread, and in severe cases, the harvest may be completely lost. It is inevitable that tomatoes will be injured in the field due to insect pests and traumatic farming operations, so only treating the seeds cannot effectively prevent and control tomato canker. At present, the harm of tomato canker has seriously restricted the development of greenhouse tomato cultivation. Summary of the invention

[0003] In view of the above situation and to solve the existing technical problems, we have researched and invented a method for preventing and controlling tomato canker in greenhouse tomatoes, which can effectively prevent and control tomato canker in greenhouse tomatoes.

[0004] The method for preventing and controlling tomato canker in greenhouse tomato cultivation according to claim 1 is characterized in that it includes the following steps: 1. breeding of living bacterial fungicides in seedbed soil; 2. sterilization and disinfection in the greenhouse; 3. combined prevention and control of fertilizer, water and medicine; 4. repair and prevention after traumatic agricultural operations.

[0005] The seedbed soil living bacterial fungicide breeding according to claim 2 is characterized in that it specifically comprises the following steps:

[0006] (1) Use 100L of non-compressed seedling medium per acre;

[0007] (2) per mu, use the following content: 20g of Bacillus subtilis wettable powder with 100 billion live spores / gram, 100g of root vine spray, and 10kg of water, and then prepare Bacillus subtilis, root vine spray and water into a fertilizer solution;

[0008] Spray the prepared fertilizer solution evenly in 100L of seedling medium and stir evenly, cover with film and let stand for 8 hours. At this time, the Bacillus subtilis in the seedbed soil has reproduced the living bacterial fungicide. Transfer the seedbed soil with the living bacterial fungicide into the seedling tray;

[0009] Sow 2,000 tomato seeds per mu in the seedling tray filled with the above-mentioned seedbed soil, cover the seeds with 3 mm thick seedbed soil, and cover with seedbed film after watering.

[0010] The indoor sterilization and disinfection according to claim 3 is characterized in that it specifically comprises the following steps:

[0011] (1) Sterilization and disinfection in the greenhouse: dilute 2-4 kg of 50% chlorobromoisocyanuric acid with 1000-2000 kg of water per mu to 500 times to obtain a disinfectant solution. Irrigate the disinfectant solution evenly on the soil surface in the greenhouse, and flood and soak it to 5-10 cm below the soil surface;

[0012] (2) After irrigation, disinfection and sterilization in the greenhouse, cover the greenhouse film and seal it tightly around the greenhouse. Wait for the fungicide solution on the soil surface to dry naturally until the soil becomes loose and no longer muddy before proceeding to the next farming operation.

[0013] The combined control of fertilizer, water and pesticide according to claim 4 is characterized in that it specifically comprises the following steps:

[0014] 1. Prepare sterile nutrient soil to replace chemical fertilizer ridge bottom application:

[0015] (1) The ingredients and weights of the nutrient soil per mu: 70% organic matter 30kg, phosphate rock 50kg, 10% magnesium fertilizer 15kg, 21% boron fertilizer 2kg, potassium dihydrogen phosphate 3kg;

[0016] (2) Put the above nutrient soil ingredients into a heating mixer, heat it to 300°C and stir it for half an hour to obtain sterile nutrient soil;

[0017] (3) After the trenches are dug in the greenhouse, the sterile nutrient soil is spread to the bottom of the trenches, and then covered with soil to form ridges;

[0018] 2. Sterilization and disinfection of ridge surface:

[0019] (4) Dilute 70g of 50% chlorobromoisocyanuric acid wettable powder with 35kg of water per mu, stir evenly, spray evenly on the ridge surface, and then cover with mulch film;

[0020] 3. Prepare root water treatment after planting tomato seedlings:

[0021] (1) Add 250 ml of 40% zinc thiazole suspension and 1000 ml of root vine spray to 500 kg of water and stir evenly to prepare a fertilizer solution to obtain rooting water;

[0022] (2) After the tomato seedlings are planted, use the above-mentioned rooting water to irrigate the roots. The dosage is: 50 ml / plant;

[0023] 4. Foliar pesticide and fertilizer control:

[0024] (1) From the flowering stage to the fruiting stage, 65 ml of 6% kasugamycin soluble solution and 200 g of Fanhua Yixiao aqueous solution are diluted with 70 kg of water and stirred evenly to obtain a fertilizer solution for the flower bud differentiation stage. Spray the leaves once every 5-7 days, and spray 2-3 times;

[0025] (2) From the fruit swelling stage to the coloring stage, select 50% chlorobromoisocyanuric acid wettable powder 100g / mu, dilute 500 times and stir evenly to obtain a fungicide solution, spray on the leaves once every 5-7 days, and spray 2-3 times;

[0026] 5. Root medicine, fertilizer and water prevention and control:

[0027] (1) After the third ear has set fruit, select 250ml of 40% zinc thiazole suspension and 2000ml of root vine spray per mu, dilute with 500kg of water, stir evenly, and then apply once with a dropper. Repeat the operation after the fifth ear has set fruit;

[0028] (2) After the seventh ear has set fruit, select 250ml of 40% zinc thiazole suspension, 2000ml of root vine spray, and 57% (19-19-19) Dilute 5kg of balanced water-soluble fertilizer with 500kg of water, stir evenly, and apply once with a drip tube after it is fully dissolved;

[0029] (3) After the first bunch of fruits begins to change color, select 500ml of 40% zinc thiazole suspension, 2000ml of root vine spray, and 5kg of 57% (12-5-40) high-potassium water-soluble fertilizer per mu, dilute with 1000kg of water, stir evenly, and apply once with a dropper after fully dissolved;

[0030] (4) After the second bunch of fruits begins to change color, select 500 ml of 6% kasugamycin soluble solution, 2000 ml of root vine liquid, and 5 kg of 57% (12-5-40) high-potassium water-soluble fertilizer per mu, add 1000 kg of water, dilute and stir evenly, and apply once with a dropper after it is fully dissolved. Repeat once after the fourth bunch of fruits changes color.

[0031] The repair and prevention after traumatic agricultural operations according to claim 5 is characterized in that:

[0032] (1) After each traumatic farming operation such as budding, flower thinning, fruit thinning, topping, and picking, the remaining branches and leaves should be cleaned up and taken out of the greenhouse in a timely manner;

[0033] (2) After each traumatic agricultural operation such as budding, flower thinning, fruit thinning, topping, and fruit picking, dilute 70 ml of 0.3% tetramycin 1000 times per mu, stir evenly, and spray the leaves once;

[0034] (3) Temperature control and ventilation management: When the temperature is below 24℃, lower the greenhouse skirt film to keep warm. When the temperature is above 37℃, cover it with a shade net to provide shade, and then roll up the skirt film for ventilation.

[0035] Further details on the implementation steps and basic principles

[0036] By implementing claim 1 of the present invention, a method for preventing and controlling tomato canker in greenhouse-grown tomatoes is characterized in that it includes the following steps: 1. breeding of living bacterial fungicides in seedbed soil; 2. sterilization and disinfection in the greenhouse; 3. combined prevention and control of fertilizer, water and medicine; 4. repair and prevention after traumatic agricultural operations.

[0037] By implementing claim 2 of the present invention, it is characterized in that the living bacterial fungicide in the seedbed soil is propagated;

[0038] By implementing claim 2.(1) of the present invention, it is characterized in that: the non-compressed seedling medium has good water absorption and water retention, contains 35% organic matter, 50 mg / kg hydrolyzable nitrogen, 100 mg / kg soluble phosphorus, and 100 mg / kg available potassium, and can provide water and nutrition for the growth and reproduction of Bacillus subtilis, allowing the growth and reproduction of the bacteria to be faster;

[0039] By implementing claim 2.(2) of the present invention, it is characterized in that: the content of the Bacillus subtilis is: 100 billion live spores / gram. Bacillus subtilis is a living bacterial fungicide. During the growth and reproduction of the bacteria, a large amount of active substances such as subtilisin, polymyxin, nystatin, and gramicidin can be produced. These active substances can effectively prevent the reproduction of pathogenic microorganisms, interfere with the infection of plant pathogenic microorganisms to plants, and destroy the colonization of pathogenic microorganisms on plants, so as to achieve the ideal antibacterial and disease prevention effect. The root vine fleabane water agent contains 80g / L of humic acid and 15g / L of potassium oxide. The root vine fleabane has an affinity with the soil, can activate soil compaction, improve soil aggregate structure, decompose residual nitrogen, phosphorus and potassium in the soil, and improve fertilizer utilization. The root vine fleabane has the function of regulating plant growth and promoting rooting. It can play the role of increasing roots and seedlings, resisting diseases, resisting adversity, resisting continuous cropping, and improving crop quality;

[0040] By implementing the method described in claim 2.(3) of the present invention, the prepared fertilizer solution is uniformly sprayed on 100L of seedling medium and stirred evenly to obtain seedling bed soil for use, and then covered with a film and allowed to stand for 8 hours before being loaded into a seedling tray. The method is characterized in that: after the fertilizer solution is sprayed on the seedling bed soil, it is covered with a film and allowed to stand for 8 hours. After standing for 8 hours in an environment with both humidity and nutrition, the living bacteria of Bacillus subtilis have multiplied in large quantities and are in an active state. At this time, loading the seedling tray is conducive to further reproduction and expansion of the living bacteria of Bacillus subtilis. When the seeds are sown, germinated and rooted, the bacterial community of the living bacteria of Bacillus subtilis has formed a protective group at the root of the tomato seedlings, which can effectively block the invasion of harmful pathogens from the outside.

[0041] By implementing claim 3.(1) of the present invention, sterilization and disinfection in greenhouses is characterized by: 1. The 50% chlorobromoisocyanuric acid sprayed on the soil surface can slowly release hypobromous acid (HOBr) and hypochlorous acid (HOCL), which have a strong effect of killing bacteria and fungi. Sprayed on the surface of crops, the matrix of hypobromous acid can release through plant internal absorption conduction to form triazinedione (DHT) and triazine (ADHL), which have a strong virus-killing effect; the starting raw material of chlorobromoisocyanuric acid contains trace elements and potassium salts, and spraying it on the surface of crops can not only kill bacteria, fungi and viruses, but also promote crop nutrition growth. 2. The disinfectant solution is evenly irrigated on the soil surface in the greenhouse, and the soil is flooded and soaked to 5-10 cm below the soil surface, which is characterized by: deep killing of fungi, bacteria and viruses in the soil;

[0042] By implementing the greenhouse film after the greenhouse irrigation, disinfection and sterilization described in claim 3. (2) of the present invention, the surrounding area is tightly sealed, and the fungicide solution on the soil surface is naturally dried until the soil becomes loose and no longer muddy before the next agricultural operation is carried out. It is characterized by: 1. After the greenhouse irrigation, disinfection and sterilization, the greenhouse film is covered and the surrounding area is tightly sealed to reduce the volatilization of hypobromous acid (HOBr) and hypochlorous acid (HOCL) to the outside of the greenhouse, making the sterilization in the greenhouse more thorough. 2. The fungicide solution on the soil surface is naturally dried until the soil becomes loose and no longer muddy before the next agricultural operation is carried out, which is characterized in that the loose soil is conducive to agricultural operations such as ditching and ridge formation.

[0043] By implementing the fertilizer, water and medicine combination prevention and control described in claim 4 of the present invention, it is characterized by: 1. (1) preparing sterile nutrient soil to replace chemical fertilizer ridge bottom base application, the sterile nutrient soil is characterized by: replacing chemical fertilizers and reducing chemical fertilizer pollution to the soil. The organic matter, phosphorus, magnesium, boron and potassium contained in the sterile nutrient soil can make the tomato seedlings have well-developed fibrous roots and strong growth. The sterile nutrient soil does not contain nitrogen fertilizer, because nitrogen fertilizer can easily increase the water content of tomato seedlings, make them grow too long, reduce disease resistance and thus cause ulcers. The preparation of sterile nutrient soil to replace chemical fertilizer ridge bottom base application is characterized by reducing the source of pathogen infection, reducing the amount of nitrogen fertilizer applied, and reducing the possibility of disease susceptibility;

[0044] By implementing the method of claim 4.1 (2) of the present invention, the above-mentioned nutrient soil ingredients are put into a heating mixer, heated to 300°C and stirred for half an hour to obtain sterile nutrient soil. The method is characterized in that: by stirring at high temperature for half an hour, harmful bacteria in the nutrient soil can be completely killed, and the nutrient soil can be fully and evenly stirred;

[0045] By implementing the sterile nutrient soil described in claim 4.1 (3) of the present invention, the sterile nutrient soil is spread to the bottom of the ditch, and then covered with soil to form ridges. The characteristics are: 1. The sterile nutrient soil can provide basic nutrition for the vegetative growth and reproductive growth of tomatoes. 2. The tomato root system is not easily infected by pathogens when it contacts the sterile nutrient soil, and the sterile nutrient soil is beneficial to the development of the tomato root system;

[0046] By implementing claim 4 of the present invention, ridge surface sterilization and disinfection: (1) 70g of 50% chlorobromoisocyanuric acid wettable powder per mu is diluted with 35kg of water and stirred evenly, then sprayed evenly on the ridge surface, and then covered with mulch film. The characteristics are: sterile nutrient soil is spread on the bottom of the ridge, chlorobromoisocyanuric acid is sprayed on the ridge surface for sterilization and disinfection, and then covered with mulch film, the bottom and the surface of the ridge can form a closed sterile environment, which can effectively prevent and control tomato infection from the root;

[0047] By implementing claim 4.3 of the present invention, the tomato seedlings are treated with rooting water after being planted: (1) 250 ml of 40% zinc thiazole suspension and 1000 ml of root vine water are mixed with 500 kg of water and stirred evenly to prepare a fertilizer solution to obtain rooting water; (2) After the tomato seedlings are planted, the above-mentioned rooting water is used for root irrigation, and the dosage is 50 ml / plant; the characteristic is that the fertilizer solution rooting water can kill bacteria and promote rooting, shortening the seedling acclimatization period. The zinc thiazole is a systemic bactericide, characterized in that the zinc thiazole is composed of two groups, wherein the thiazole group is a highly effective therapeutic agent in the plant body, which can make the cell wall thinner and cause death. In addition, zinc ions have both fungicidal and bactericidal effects. Zinc thiazole has a systemic upward conduction effect. The combination of zinc thiazole and root vine fleabane to make a medicated fertilizer solution as rooting water is an unprecedented combination. Zinc thiazole has a highly effective therapeutic effect in plants through root absorption and transportation. When mixed with root vine fleabane as rooting water, it can sterilize and regulate growth, thus enhancing the disease resistance and stress resistance of tomato seedlings.

[0048] By implementing claim 4 of the present invention, foliar pesticide and fertilizer control: (1) from the flowering period to the fruiting period, 65 ml of 6% kasugamycin soluble solution and 200 g of safflower yogurt solution are selected per mu, diluted with 70 kg of water and stirred evenly to obtain a fertilizer solution for the flower bud differentiation period, which is sprayed on the leaves once every 5-7 days, and sprayed 2-3 times; the characteristics are as follows: first, kasugamycin has strong systemicity, which is active against fungi and has a preventive and therapeutic effect on bacterial diseases; second, safflower yogurt contains 20% potassium, 30% phosphorus, and 2% magnesium. Foliar spraying can provide nutrients for tomatoes, phosphorus can promote flower bud differentiation and increase fruit setting rate, potassium and magnesium can promote chloroplast formation, increase chlorophyll and enhance photosynthesis; third, kasugamycin and safflower yogurt are diluted and stirred evenly and then sprayed on the leaves. While ensuring the nutrient supply of tomatoes from the flowering period to the fruiting period, it also prevents and controls bacterial infection, and pesticide and fertilizer are carried out simultaneously, saving time and effort;

[0049] By implementing claim 4.4 of the present invention, (2) 50% chlorobromoisocyanuric acid wettable powder 100g / mu is selected from the fruit swelling stage to the coloring stage, diluted 500 times and stirred evenly to obtain a fungicide solution, and sprayed on the leaves once every 5-7 days, and sprayed 2-3 times; the characteristic is that: the research and development personnel use chlorobromoisocyanuric acid to spray on the surface of crops to not only kill bacteria, fungi and viruses, but also promote the nutritional growth of crops. These characteristics prevent tomato canker while taking into account the prevention and control of other diseases and the nutritional growth of crops;

[0050] By implementing claim 4 of the present invention, root medicine, fertilizer and water control: It is characterized by limited supply of water and fertilizer, limiting the amount of water and fertilizer can reduce the incidence, save resources, and the medicine, fertilizer and water are implemented simultaneously, which can improve the control effect and save labor costs. The specific implementation plan is the following steps:

[0051] (1) After the third ear has set fruit, select 250ml of 40% zinc thiazole suspension and 2000ml of root vine spray per mu, dilute with 500kg of water, stir evenly, and then apply once with a dropper. Repeat the operation after the fifth ear has set fruit;

[0052] (2) After the seventh ear has set fruit, 500 ml of 40% zinc thiazole suspension, 2000 ml of root vine spray, and 5 kg of 57% (19-19-19) balanced water-soluble fertilizer are diluted with 1000 kg of water per mu, stirred evenly, and applied once with a dropper after fully dissolved;

[0053] (3) After the first bunch of fruits changes color, select 500 ml of 40% zinc thiazole suspension, 2000 ml of root vine spray, and 5 kg of 57% (12-5-40) balanced water-soluble fertilizer per mu, dilute with 1000 kg of water, stir evenly, and then apply once with a dropper.

[0054] (4) After the second bunch of fruits changes color, select 500 ml of 6% kasugamycin soluble solution, 2000 ml of root vine liquid, and 5 kg of 57% (12-5-40) balanced water-soluble fertilizer per mu, add 1000 kg of water, dilute and stir evenly, and apply once with a dropper after it is fully dissolved; repeat once after the fourth bunch of fruits changes color.

[0055] By implementing the repair and prevention after traumatic agricultural operations as described in claim 5 of the present invention, it is characterized in that (1) after each agricultural operation such as budding, flower thinning, fruit thinning, topping, and picking, the dead branches and leaves produced are cleaned up and taken out of the greenhouse in a timely manner; the dead branches and leaves can be prevented from rotting and breeding pathogens in the greenhouse;

[0056] By implementing the method of claim 5.(2) of the present invention, after each traumatic agricultural operation such as bud beating, flower thinning, fruit thinning, topping, and fruit picking, 70 ml of 0.3% tetramycin is diluted 1000 times per mu and stirred evenly, and then sprayed on the leaves once; the characteristic is that repeated trauma to tomatoes is inevitable after each agricultural operation such as bud beating, flower thinning, fruit thinning, topping, and fruit picking. The researchers use tetramycin to contain multiple antibiotics, which can prevent and control bacterial diseases, improve crop immunity, promote healing and regeneration of crop tissue after injury, and enhance plant photosynthesis. Spraying tetramycin on the leaves after traumatic agricultural operations can reduce the risk of pathogens infecting from the wound, shorten the wound healing time, and improve the bactericidal effect, thereby achieving the purpose of preventing tomato canker disease;

[0057] By implementing the temperature control and ventilation management described in claim 5.(3) of the present invention, when the temperature is below 24°C, the greenhouse skirt film is lowered for heat preservation, when the temperature is above 37°C, a sunshade net is added for sunshade, and then the skirt film is rolled up for ventilation. It is characterized in that the temperature in the greenhouse can be adjusted by retracting the greenhouse skirt film and covering the sunshade net, and enhanced ventilation can limit the conditions for the onset of tomato canker.

[0058] The present invention can further illustrate the control effect of the present invention on controlling canker virus in tomato cultivation in greenhouses through the following two test examples:

[0059] Test Example 1

[0060] The test plan is to select the same field in an area with an altitude of 1,300 meters where the incidence of greenhouse tomato ulcer disease in previous years was more than 40%, design two adjacent greenhouses of one mu of land, sow 2,000 seeds in each greenhouse at the same time, and one of the greenhouses is planted according to the method of the present invention.

[0061] Planting management: Another greenhouse was planted and managed according to the conventional methods of previous years. The occurrence of tomato canker was investigated 15 days after the tomato seedlings were transplanted and planted. The investigation was conducted every 15 days for a total of six investigations. The statistical records are shown in Table 1.

[0062] Table 1 The transplanting date of tomato seedlings is May 20, 2022

[0063] Test Example 2

[0064] The test plan is to select the same field in an area with an altitude of 1550 meters where the incidence of greenhouse tomato canker disease in previous years was more than 40%, design a one-acre greenhouse, separate it with a film in the middle, sow 1000 seeds on each side, plant and manage the east greenhouse according to the method of the present invention, and plant and manage the west greenhouse according to the conventional method of previous years. 15 days after the tomato seedlings are transplanted and planted, investigate the occurrence of tomato canker disease at the same time, investigate and count once every 15 days, and investigate six times in total. The statistical records are shown in Table 2

[0065] Table 2 Tomato seedlings transplanting date is May 23, 2022

[0066] According to the test examples in Table 1 and Table 2 above, tomatoes were planted in greenhouses at different altitudes. The incidence of tomato canker in the planting management method of the present invention was compared with that in the conventional planting management method. The present invention has a significant effect in preventing and controlling tomato canker in greenhouses.

[0067] The present invention has the following advantages:

[0068] The method for preventing and controlling tomato canker in greenhouse-grown tomatoes of the present invention is characterized in that: from tomato sowing, seedling raising, fertilization, planting, budding, flower and fruit thinning, fertilizer, water and medicine application, and fruit picking, etc., each production link has a scientific, systematic, comprehensive and effective prevention and control method, and different prevention and control schemes are provided for the roots, stems, leaves, flowers and fruits of tomatoes during the entire growth period, which has significant effects, simple operation, resource saving, labor saving and low cost.

[0069] The above description has explained the basic principles, significant features and advantages of the present invention. The above implementation steps are only preferred schemes of the present invention and do not limit the present invention. Although the present invention has been described in detail through the above-mentioned inventive principles and implementation steps, the dosage form and dosage implementation steps can still be adjusted to a certain extent. If there is no special creative invention, any improvement, modification, equivalent substitution, etc. made within the basic principles and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for preventing and controlling tomato canker in greenhouse-grown tomatoes, characterized in that: The method comprises the following steps:

1. breeding of living bacteria fungicides in seedbed soil; 2. sterilization and disinfection in greenhouse; 3. combined prevention and treatment of fertilizer, water and medicine; 4. repair and prevention after traumatic agricultural operations.

2. The method for preventing and controlling tomato canker in greenhouse-grown tomatoes according to claim 1, characterized in that: The seedbed soil living bacterial fungicide breeding specifically includes the following steps: (1) Use 100L of non-compressed seedling medium per acre; (2) per mu, use the following content: 20g of Bacillus subtilis wettable powder with 100 billion live spores / gram, 100g of root vine spray, and 10kg of water, and then prepare Bacillus subtilis, root vine spray and water into a fertilizer solution; (3) Spray the prepared fertilizer solution evenly on 100L of seedling medium and stir evenly, cover with a film and let stand for 8 hours. At this time, the Bacillus subtilis in the seedbed soil has reproduced the living bacterial fungicide, and the seedbed soil with the living bacterial fungicide is placed in the seedling tray; (4) Sow 2,000 tomato seeds per mu in the seedling tray filled with the above-mentioned seedbed soil, cover the seeds with 3 mm thick seedbed soil, and cover with seedbed film after watering.

3. The method for preventing and controlling tomato canker in greenhouse-grown tomatoes according to claim 1, characterized in that: Sterilization and disinfection in the greenhouse includes the following steps: (1) Sterilization and disinfection in greenhouses: dilute 2-4 kg of 50% chlorobromoisocyanuric acid with 1000-2000 kg of water per mu to 500 times to obtain a disinfectant solution. Evenly irrigate the disinfectant solution on the soil surface in the greenhouse, and flood and soak it to 5-10 cm below the soil surface; (2) After irrigation, disinfection and sterilization in the greenhouse, cover the greenhouse film and seal it tightly. Wait for the fungicide solution on the soil surface to dry naturally until the soil becomes loose and no longer muddy before proceeding to the next farming operation.

4. The method for preventing and controlling tomato canker in greenhouse-grown tomatoes according to claim 1, characterized in that: Fertilizer, water and pesticide combined prevention and control, specifically including the following steps:

1. Prepare sterile nutrient soil to replace chemical fertilizer ridge bottom application: (1) The ingredients and weights of the nutrient soil per mu: 70% organic matter 30kg, phosphate rock 50kg, 10% magnesium fertilizer 15kg, 21% boron fertilizer 2kg, potassium dihydrogen phosphate 3kg; (2) Put the above nutrient soil ingredients into a heating mixer, heat it to 300°C and stir it for half an hour to obtain sterile nutrient soil; (3) After the trenches are opened in the greenhouse, the sterile nutrient soil is spread to the bottom of the trenches, and then covered with soil to form ridges; 2. Sterilization and disinfection of ridge surface: (4) Dilute 70g of 50% chlorobromoisocyanuric acid wettable powder with 35kg of water per mu, stir evenly, spray evenly on the ridge surface, and then cover with mulch film; 3. Prepare root water treatment after planting tomato seedlings: (1) Add 250 ml of 40% zinc thiazole suspension and 1000 ml of root vine spray to 500 kg of water and stir evenly to prepare a fertilizer solution to obtain rooting water; (2) After the tomato seedlings are planted, use the above-mentioned rooting water to irrigate the roots. The dosage is: 50 ml / plant; 4. Foliar pesticide and fertilizer control: (1) From the flowering stage to the fruiting stage, 65 ml of 6% kasugamycin soluble solution and 200 g of Fanhua Yixiao aqueous solution are diluted with 70 kg of water and stirred evenly to obtain a fertilizer solution for the flower bud differentiation stage. Spray the leaves once every 5-7 days, and spray 2-3 times; (2) From the fruit swelling stage to the coloring stage, select 50% chlorobromoisocyanuric acid wettable powder 100g / mu, dilute 500 times and stir evenly to obtain a fungicide solution, spray on the leaves once every 5-7 days, and spray 2-3 times; 5. Root medicine, fertilizer and water prevention and control: (1) After the third ear has set fruit, select 250ml of 40% zinc thiazole suspension and 2000ml of root vine spray per mu, dilute with 500kg of water, stir evenly, and then apply once with a dropper. Repeat the operation after the fifth ear has set fruit; (2) After the seventh ear has set fruit, 250 ml of 40% zinc thiazole suspension, 2000 ml of root vine spray, and 5 kg of 57% (19-19-19) balanced water-soluble fertilizer are diluted with 500 kg of water per mu, stirred evenly, and applied once with a dropper after fully dissolved; (3) After the first bunch of fruits begins to change color, select 500ml of 40% zinc thiazole suspension, 2000ml of root vine spray, and 5kg of 57% (12-5-40) high-potassium water-soluble fertilizer per mu, dilute with 1000kg of water, stir evenly, and apply once with a dropper after fully dissolved; (4) After the second bunch of fruits begins to change color, select 500 ml of 6% kasugamycin soluble solution, 2000 ml of root vine liquid, and 5 kg of 57% (12-5-40) high-potassium water-soluble fertilizer per mu, add 1000 kg of water, dilute and stir evenly, and apply once with a dropper after it is fully dissolved. Repeat once after the fourth bunch of fruits changes color.

5. The method for preventing and controlling tomato canker in greenhouse-grown tomatoes according to claim 1, characterized in that: Restoration and prevention after traumatic agricultural operations (1) After each operation such as budding, flower thinning, fruit thinning, topping, and picking, the remaining branches and leaves should be cleaned up and taken out of the greenhouse in a timely manner; (2) After each traumatic agricultural operation such as budding, flower thinning, fruit thinning, topping, and fruit picking, dilute 70 ml of 0.3% tetramycin 1000 times per mu, stir evenly, and spray the leaves once; (3) Temperature control and ventilation management: when the temperature is below 24℃, lower the greenhouse skirt film to keep warm; when the temperature is above 37℃, add a shade net to provide shade, and then roll up the side film for ventilation.

Images