Tomato leaf curl/bumps on tomato stem,such symptoms would always happen on tomatoes,how to deal with it?We would tell you in this article.
How to deal with bumps on tomato stem?
Sometimes you would find some bumps on tomato stem, what happened? This is one kind of tomato stem diseases:bacterial canker tomato.
Disease symptoms and cycle of Bacterial canker tomato
Bacterial canker tomato invades from the stem and expands from the phloem to the pith.
Initial symptoms of Bacterial canker tomato:
- The lower part withers or shrinks vertically.
- Appears to be dehydrated, with one or part of the leaflets withered.
- The inside of the stem turns brown, and the diseased spots extend up and down, up to one to several nodes in length.
Late symptoms of Bacterial canker tomato:
- The cavities of different lengths are produced, and finally sink or crack, the stems become slightly thicker, and many adventitious roots are born.
- The lower leaves of the tomato plant are yellow;
- When the rain is heavy or the humidity is high, fungal pus overflows from the diseased stem or petiole diseased part, and the fungal pus attaches to the diseased part to form a white dirt;.The stem turns brown and penetrates, the whole plant is dead, and the upper part of the dead plant is dead. The top leaves are withered.
The harm of Bacterial canker tomato
The fruit stalk is usually damaged by the expansion of the stem disease bacteria, causing the phloem and hip to appear brown and rot, which can extend into the fruit. It can cause diapause, shrinkage, and deformity of the young fruit, causing abnormal seeds and carrying bacteria.
Sometimes it is locally infected from the surface of the sepal, resulting in necrotic spots, which spread to the fruit surface. A bird’s eye spot is formed on the surface of the diseased fruit when it is wet. Bird’s eye spot is round with slightly raised white surroundings and brown cork-like protrusions in the center. A single spot is about 3 mm in diameter. Sometimes a lot of bird’s eye spots come together to form an indeterminate diseased area. Bird’s eye spot is a species-specific symptom of the diseased fruit of Bacterial canker tomato. It is caused by re-infection and does not necessarily occur in the same plant as the stem system infection.
Causes of Bacterial canker tomato
Infecting plants or fruits is mainly through wounds, but it can also invade directly from stomata or the surface of the fruit. During the tomato growing period, warm and humid, rainy weather, or long-term dew condensation is conducive to the disease. After the disease occurs, partial application of nitrogen fertilizer or flood irrigation will cause the disease to spread. The most suitable growth temperature for the bacteria is 25–27°C, and the growth temperature range is 1-33°C. The disease is prevalent because of high temperature and high humidity and continuous cropping and drainage.
How to deal with bumps on tomato stem(Bacterial canker tomato)?
- Appropriate application of nitrogen fertilizer, not too much, too much nitrogen fertilizer will cause soil compaction.
- Increase the application of organic fertilizer, biological bacterial fertilizer or biological organic fertilizer.
- Improve soil structure, fertility and soil fertility, and improve soil fertility and water retention performance.
- Promote the development of the root system and the strong plant.
- Pay attention to observation and found that a small number of diseased plants were immediately pulled out and buried, and then the diseased area was sprayed with Ralstonia solanacearum to kill the remaining pathogens.
What happen if tomato leaf curl?
There are many reasons for ‘Tomato leaf curl’, which are related to water, nutrients, soil and diseases. Tomatoes lack moisture, the branches and leaves lack moisture, and the leaves will gradually curl. During the growth period, there is insufficient nutrients, lack of nitrogen or potassium, and insufficient chlorophyll in the leaves, which will gradually turn yellow. After the soil is compacted, the root system will not grow well, which will also cause the tomato leaf to curl.
Tomato leaf curl cause 1. Insufficient moisture for
Tomatoes like humidity, and the soil and air are required to be humid enough, otherwise the tomatoes will grow badly. During the curing period, if the tomatoes are in a dry environment for a long time, the tomatoes lack water and the tomato leaf curls. If it is caused by insufficient water, the tomatoes need to be watered in time to add water to them, and the watering method needs to be adjusted in the later maintenance.
Tomato leaf curl cause 2. Lack of fertilizer
Tomatoes need fertilizer during the growth period, especially before the flowering and fruit period. Adequate fertilizer is conducive to the growth of flowers and fruits. During the curing period, tomatoes lack fertilizers, lack of nutrients, and the tomato leaf curls, becomes dry, or turns yellow. If the tomato lacks fertilizer, it should be supplemented. Nitrogen fertilizer can be added in the early stage of growth, and phosphorus and potassium fertilizer should be added before the flowering period and fruit period.
Tomato leaf curl cause 3. Soil compaction
Tomatoes like wetness, but they are not tolerant to waterlogging. They are suitable for growing in deep soil, well-ventilated and well-drained soil. During the curing period, if the soil is hardened, the roots of tomatoes cannot breathe and grow normally, which will cause their leaves to curl and turn yellow. If it is caused by soil compaction, loosen the soil or use soil conditioners for tomatoes.
Tomato leaf curl cause 4. Germ damage
Tomato leaf curl,how to fix it?
Tomato leaf curl in growth stage, it may be infected by germs and viral diseases. Viral diseases can cause the leaves of tomatoes to curl, turn yellow, dry out, or fall off. If the tomato has a viral disease, you can spray it with Kedubao medicine, and spray it once every 7 to 10 days. After spraying it continuously for 2 to 3 times, the disease can be suppressed.
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