How to distinguish tomato tomato wilt from bacterial wilt?

Tomato plant I think many people like to eat it, but tomato and tomato fruit in the actual planting process, is very difficult to control because they get too many diseases, among which there are two diseases that are particularly difficult to distinguish, they are blight and bacterial wilt, these two are often mixed together, it is very difficult to identify, today I will identify the difference between tomato or tomato wilt and wilt, and tell you how to prevent it.

The first thing to tell you is that the basic symptoms of the disease are that the lower leaves begin to yellow to die, and then begin to spread upwards little by little, at first it is one side of the leaf begins to turn yellow, and the other looks a little green, and when the disease is serious, the entire tomato leaves will die, but it will not fall off, and the color of the leaves is mostly that yellow color, and it is also accompanied by a particularly strong red mold, If at this time you want to peel it off to see what it is like, what you get is disappointment because there is nothing in the rhizome, not even a little nutrient solution can be found, this is the direct characteristic of blight, if it is not well treated, it must be uprooted as necessary, and the soil must be disinfected at a deep level, at least three to four times, once a week!

And bacterial wilt and wilt have a clear difference, that is, bacterial wilt will not cause tomatoes and tomatoes to die, at most will lead to poor development of tomatoes or stop growing, or even directly reduce yield, the main feature of bacterial wilt is that it is easy to appear in the tomato flowering stage, at the beginning there is no special performance, that is, the leaves at the top of the tomato begin to wilt and have no vitality, but it is a little wilted during the day, and it will naturally recover after the evening, If it's not serious, it's basically no problem, but if it's serious, it will affect the life and death of the tomato, and eventually it will die alive, and if it encounters rainy weather, the disease will become faster, and then it will be easier to spread! Therefore, for these two diseases, tomato growers must pay serious attention to it, and everyone must deal with it carefully!

Of course, don't panic when you really encounter something, as long as it is in accordance with the normal preventive measures to prevent it, some drugs will generally be used for prevention, in fact, the best prevention is that the growers are diligent, go to their own homes to walk around, so that after encountering the situation, you can also deal with it decisively in the first time, I hope you can like it!

Tomato wilt is a fungal disease of tomato caused by Fusarium acumensis, while tomato bacterial wilt is a bacterial disease of tomato caused by Pseudomonas solanacum solanacium.

Tomato wilt disease is mostly the occurrence of tomato flowering and fruiting, this disease usually starts to yellow from the bottom of the leaves, and then the disease is slowly serious, the whole leaf except the top will turn yellow until necrotic tomato wilt The symptoms of the disease are mainly manifested in the seedling stage is not obvious, and the leaves will wilt when the flowers and fruits, generally will occur at noon when the sun is big and will wilt, and return to normal in the morning and evening, and so on, there will be death after many times, Withered.

Wilt disease of tomato occurs on plants, while bacterial wilt is produced on tomato fruit and is very easy to distinguish. Once pests and diseases are found, plant-specific insecticides should be used in a timely manner.

What to do if tomato has wilt? Tell you 1 "secret" that is easier to solve.

Tomato bacterial wilt, the top leaves at noon in the early stage of the disease are wilted, recover in the morning and evening, break the vascular bundle at the base of the stem, squeeze it by hand to see the overflow of fungal liquid (bacteria), repeat 3 5 days after the plant wilt dies, can be treated with copper hydroxide, thiamethox, thiamethone, copper pinesinate, chunleimycin, mesomycin, allicin, chlorobromon, isocyanuric acid, and other agents for spray irrigation control.

It is recommended to apply Bacillus multiviscosis or beneficial bacteria bioliquid fertilizer, which can inhibit pathogens and improve the disease resistance of tomatoes.

These two diseases can wilt and even cause death in tomato plants. The easiest way to identify the stem is to cut the stem longitudinally and place it in a clear glass filled with water. If there is a mucus overflow, it is bacterial wilt, and if there is no mucus overflow, it is wilt.

Rosotanacy is originally a bacterial disease with varying degrees of dryness in the leaves, adventitious roots at the base of the plant, hollow stems, and wilted tomatoes. If you cut the base of the stem, you can clearly see that the color of the vascular bundles has changed to brown. It is because these vascular bundles are destroyed that nutrients and water cannot be transported upwards properly, causing tomatoes to wilt.

Experts from the vegetable medicine network remind everyone that if tomato bacterial wilt is not timed, it will wilt and die many times, bringing great losses to vegetable farmers.

Fusarium wilt usually begins to appear after planting. At the beginning of the disease, the leaves near the ground turn yellow, and finally turn brown and die, and the dead leaves remain on the stem without falling off; Some stems have yellow leaves on one side and normal colors on the other. There are also some shoots that have half yellow leaves and half normal leaves.

When the disease is severe, the diseased leaves are from the bottom up, and finally only the parietal lobes remain, and the rest die. The condition is mild, only the yellow leaves near the ground, the rest are normal. The roots of the diseased plants are brown rot or local necrosis, and the vascular bundles are yellow-brown when the stem base is dissected.

Experts from the Vegetable Medicine Network believe that the main symptom of this disease is different from bacterial wilt is that the leaves of the plant turn yellow after getting this disease, and pink mold tends to grow at the base of the stem when wet. Moreover, bacterial wilt is less harmful to the root system.

An effective way to control both of these diseases is to water the roots with chemicals, but to take precautions. When choosing drugs, it is best to choose drugs with strong systemic properties, such as chlorobromoisocyanuric acid, copper rosinic acid, etc. For disease-free tomatoes, a protective spray with streptomycin, mesobiomycin and androcides can be used to prevent bacterial wilt.

For the prevention and control of Fusarium wilt, carbendazim + formecil + oxazine can be used as root irrigation with remarkable effect. Tomato plants that have died from the disease should not be discarded in the greenhouse, but buried deep outside the greenhouse while the soil is disinfected. R. solanacearum and Fusarium wilt can be transmitted by running water, and flooding can cause rapid spread of pathogens.

Therefore, experts remind everyone that it is strictly forbidden to flood irrigation in greenhouses with symptoms of dead trees. And pay attention to irrigating the roots before watering.

In fertilization, it is necessary to pay attention to the rational use of nitrogen fertilizer, and apply more organic fertilizer and phosphorus and potassium fertilizer to enhance the disease resistance of plants. At the same time, pay attention to cultivating strong roots. Fusarium wilt and bacterial wilt are diseases that infect vascular bundles, block vascular transport, and affect water and nutrient transport.

If the stem of the diseased tomato plant has a rough stem skin with aerial roots, it is bacterial wilt. Fusarium wilt has no aerial roots. In addition, the stems can also be cut and squeezed in clean water.

If bacterial pus is present, tomato bacterial wilt can also be diagnosed. Bacterial pus is a unique symptom of bacterial disease, and the time from onset to death of bacterial wilt is short, with death in 2-3 days under high temperature and dry soil, and about 7 days under low temperature and high soil moisture. Fusarium wilt has a longer course of disease, from onset to death, which can be as long as 20 days to 1 month.

This can also be used as a reference for diagnosis.

Tomato bacterial wilt is a bacterial disease, mainly affecting stems and leaves, generally in the adult stage, first the parietal leaf wilts and droops, then the lower leaves wilt, and finally the middle leaf wilts, and there is also one side of the leaf wilts first or the whole plant leaf wilts at the same time. At the beginning of the disease, the diseased plants wilt during the day and recover in the evening, and the diseased leaves are light green. If the soil is dry and the temperature is high after the onset of the disease, the whole plant withers in 2 3 days, if the temperature is low, continuous rain or the soil moisture content is high, the diseased plant can last for 5 7 days and then die, but the leaves still remain green or light green, so it is called bacterial wilt.

Diseased stems may be found to be water-soaked and then brown patches. Transverse section of the diseased stem shows that the vascular bundles are brown, and the tender stems are pressed by hand, and white bacterial fluid can be seen overflowing from the vascular bundles on the section, which is a typical symptom of bacterial wilt.

Fusarium wilt, also known as wilting disease, is a soil-borne bacterial disease, mainly affecting rhizomes. Generally, the onset of the flowering and fruiting period, the middle and lower leaves of the initial plant wilt and droop around noon, and return to normal in the morning and evening, the leaf color is slightly light, like the symptoms of lack of water, and finally die, but the leaves do not fall off. Sometimes only one side of the plant is affected, and the other side grows normally.

The base of the stem is water-soaked near the ground, and when wet, it produces pink mold, i.e., molecular sporozoite and conidia. Transsection of the diseased stem shows that the vascular bundles are brown, and the sterile fluid exudes by hand squeezing, which is the main difference from bacterial wilt.

Bacterial wilt and wilt are both important diseases of nightshades. On the surface, these two diseases are similar: they are both soil-borne diseases, and the disease of continuous cropping is severe; After the onset of the disease, the plants showed aboveground wilting. Leaves that begin to wilt at the beginning of the disease can recover sooner or later; Severe occurrence of low-lying land and sunny weather after rain; The vascular bundles of the diseased plants all turned brown.

However, there is a big difference between the two diseases, with bacterial wilt being a bacterial disease and wilt being a fungal disease. In addition, from the perspective of pathogenesis, there are also great differences between the two diseases:

At the beginning of the disease, the cortex at the base of the stem of the blighted plant was water-soaked and gradually turned brown, and the plant gradually turned yellow and wilted from bottom to top. However, bacterial wilt does not have this kind of flooding, and the upper part of the plant wilts first, followed by the lower part, and finally wilts in the middle.

Fusarium wilt plants often wilt on one side and normal on the other, or at least some plants in the field, but bacterial wilt is almost absent.

Tomato bacterial wilt is a bacterial disease caused by infection with Pseudomonas solanacear. Generally, when the tomato plant is about 30 cm tall, the bacterial wilt plant begins to show symptoms. First, the top leaves wilt and droop, then the lower leaves wither and do not turn yellow, the middle leaves finally wilt, and there are also one side of the leaf wilting first or the whole leaf wilting at the same time.

Tomato wilt meaning:

Tomato wilt socks celery disease is also known as bacterial wilting disease. Symptoms are not present at the seedling stage. The disease begins at the beginning of tomato fruit set.

First, the top leaf wilts and droops, then the lower leaf wilts, and the middle leaf wilts the latest. The diseased plants wilted significantly at noon during the day at the beginning of the day, and returned to normal at night. At this time, if the soil is dry and the temperature is high, the whole plant will wither after 2 or 3 days of celebration until it dies.

If the temperature is low, continuous rain or the soil moisture content is high, the diseased plant can last for about a week before dying, and the plant will remain green after death. The epidermis at the base of the stem of the diseased plant is rough, and a large number of roots of different lengths are often produced. When the weather is wet, 1 2 cm patches may appear on the diseased stems that are water-stained and then brownish.

Bacterial wilt is a bacterial disease caused by infection with the bacterium Pseudomonas solanacium. The disease mainly lives with the remains of diseased plants in the soil for 1 6 years.

Tomato wilt control methods:

1. Crop rotation. The pathogen overwinters in the soil with mycelium or thick-walled spores with the diseased residues, and invades the host from the young tomato roots or wounds in the second year, causing the disease to occur. Therefore, crop rotation with non-solanaceae crops should be implemented for more than 3 years.

2. Disinfection of bed soil. Using new soil, 8 10 grams of 50% carbendazim wettable powder and 4 5 kg of fine soil are mixed with 4 5 kg of fine soil per square meter of bed surface, and the medicinal soil is used to pad the bed and cover the seeds when sowing.

3. Seed disinfection. Soak seeds in warm water at 52 degrees for 30 minutes, or soak seeds in 500 times of 500 times of carbendazim wettable powder for 1 hour, wash and then germinate and sow seeds.

4. Pharmaceutical prevention and control. At the beginning of the disease, spray 500 times of 50% carbendazim wettable powder, or 500 times of 50% methyl tobuzin wettable powder, or irrigate roots with 10% double-effect liquid 200 times, once every 7 10 days, and irrigate 2 3 times continuously.

Causes of bacterial wilt:

Bacterial wilt is a bacterial disease and is a soil-borne disease. For many years, the disease is serious in the continuous cropping plots, such as the Honghe area of Yunnan, many greenhouses are planted for 10 years, and the incidence of bacterial wilt is serious. Pathogens that have been around for many years often lurk in the soil and multiply in large numbers.

The plant grows weakly, has poor disease resistance, is easy to die, and is easy to die.

Pathogenesis:

Bacteria invade from the wounds and stomata of roots or stems, and spread in the vascular tissues, causing duct blockage, vascular bundle damage, and when the light is strong at noon, more water is needed but less water is actually transported, and the leaves naturally wilt in short supply.

R. wilt control measures:

1.Uproot the diseased tomato plants and sprinkle an appropriate amount of quicklime or plant ash or 20% lime water in the diseased hole to prevent the spread of the disease.

2.Pay attention to water and fertilizer management, and achieve a reasonable combination of nitrogen, phosphorus and potassium; Drain water in time after rain to avoid flooding, which can lead to expansion.

3.For plants that are not infected with the disease, foliar spraying or root irrigation microbial agents can be applied to enhance the disease resistance of tomato plants, so as to prevent tomato bacterial wilt.

4.Wounds at the base of the roots or stems of bacterial wilt plants invade, and adult pests can cause plant wounds, so insecticides should be applied in plots where adult damage is serious.

pest control.

5.When the first symptoms of tomato bacterial wilt appeared, irrigate the roots with 600 times of 4% pyrimidine nucleoside antibiotics, or 4000 times of 72% agricultural streptomycin sulfate soluble powder, or 4000 times of new phytomycin, and irrigate each plant once, 8 10 days, 2 3 times. or azoxystrobin-difenoconazole suspension 1500 times + 40% carbendazim-pentachloronitrobenzene 800 times + 2% chunleimycin wettable powder root irrigation treatment.

When the onset of bacterial wilt is severe, you can try to apply octylamine acetate for root irrigation, each plant is irrigated with a liter of pesticide solution, irrigated once every 7 10 days, and used 2 or 3 times in a row, which can achieve a better control effect.