Causes and solutions of root rot of rieger begonia 1, watering problems
Rieger begonia is very serious about watering. The soil can't be dry, Toya can't be wet, and the amount of watering should be controlled. Too much watering and too wet soil will lead to water accumulation in the basin, which will soak the roots in water and eventually lead to root rot. Too little watering, the roots can't get enough water, and it can also lead to root rot.
Solution: If the root rot of Rieger Begonia is caused by watering, first cut off all the rotten roots, replant new soil and change the correct watering method. Generally, Rieger Begonia is watered every 4-6 days in spring and autumn, and it is hot and dry in summer, once every morning and evening, and once every 8- 10 days in winter, and the soil should be thoroughly watered every time.
2. Overfertilization
Rieger begonia needs to be given enough nutrients when it is cultured, so it needs to be fertilized regularly to help it grow better and let it bloom beautiful flowers. But you can't excessive fertilization, otherwise the roots of Rieger Begonia will fester, which will affect the normal growth of Rieger Begonia. If the amount of fertilization is small, it will lead to poor growth of Rieger Begonia, so we must pay attention to fertilization.
Solution: You need to dig Rieger Begonia out of the pot, cut off the rotten roots and plant it in new soil. There is no need to blindly fertilize, and the correct fertilization method needs to be changed. Generally, the compound fertilizer mixed with nitrogen, phosphorus and potassium is applied once every 10 ~ 15 days in spring and autumn, and it will be in a semi-dormant state in summer, and can be applied once every other month, but not in winter.
3. The temperature is too low
Rieger Begonia is not cold-tolerant, and is suitable for growth at 18 ~ 22℃. Generally, there is no problem in breeding in spring, summer and autumn, but it can't survive below 15℃, otherwise it will lead to frozen roots of Rieger Begonia, and finally the roots will fester, which will affect the growth. If the temperature is too low, it may directly lead to the withering and death of Rieger Begonia.
Prevention and control methods: What if the temperature is too low? First, I need to cut off its rotten roots and then move it indoors for cultivation. I can use air conditioners, heaters and other heating supplies to control the temperature above 15 ~ 20℃ to promote its slow recovery and help it survive the winter safely.
4. Poor ventilation
Every plant has different requirements for the environment. Rieger begonia is particularly demanding on the environment. It needs to live in a well-ventilated environment, because Rieger Begonia needs to breathe. If it is not cultivated in a well-ventilated environment, it will make Rieger Begonia grow poorly, inhibit its natural growth, and finally cause root rot, which has a great impact on Rieger Begonia.
Prevention and control methods: cut off the rotten roots and move them to a ventilated environment, which can be placed on balconies, gardens and other places. These places are well ventilated and sunny, and then carefully cared for, waiting for Rieger Begonia to slowly return to normal.
Second, pay attention to rieger begonia breeding 1, sunshine demand
Photosynthesis of Rieger Begonia in the sun can help Rieger Begonia absorb nutrients, promote its better growth and produce beautiful flowers. However, shading should be done well every summer, otherwise it is easy to wither and die, and there is no sun in the flowering area, otherwise it will affect the flowering yield.
2, plastic pruning
Every autumn, that is, the most vigorous growth season, Rieger Begonia can be pruned once, and all useless old branches, lateral branches, branches and leaves that cannot bloom and affect the appearance can be cut off, which can not only increase the ornamental value of Rieger Begonia, but also reduce the consumption of nutrients and promote the beautiful flowers of Rieger Begonia.
III. Pest Control of Rieger Begonia 1, Botrytis cinerea
The most common disease of Rieger Begonia is Botrytis cinerea. In the early stage of the disease, there will be small grayish brown spots on the leaves of Rieger Begonia. For a period of time, botrytis cinerea will spread rapidly to every branch of Rieger Begonia, which will not only affect the growth and beauty, but also affect the yield of flowers, and eventually make Rieger Begonia wither and die.
Prevention and control methods: Rieger begonia should be moved to a ventilated and sunny environment to ensure the humidity in the air. Cut off all the diseased branches of Rieger Begonia, and spray 50% iprodione diluted by 1000 ~ 1500 times, or spray 40% pyrimethanil suspension for prevention and control, once every five days and twice in a row.
2. Nematodes
Nematodes do not pose a threat to the branches and leaves of Rieger Begonia. Nematodes will have a great impact on the roots of Rieger Begonia, which will become food, affect the absorption of nutrients by Rieger Begonia, lead to malnutrition of Rieger Begonia, the leaves lose color, wither gradually for a long time, and finally lead to the death of Rieger Begonia.
Prevention and control methods: If it is found that Rieger Begonia encounters nematodes, it needs to be dug out of the potted plant, and then all the rotten parts of the roots are cut off and replanted in new soil. You can use 10% aniline phosphorus or 3% Mi Le for root irrigation, every other week 1 time, three times in a row.
Conclusion: Through the above introduction, I believe everyone knows the causes and solutions of root rot of Rieger Begonia, as well as the matters needing attention in cultivation and pest control of Rieger Begonia. I hope everyone can cultivate beautiful Rieger Begonia in their lives.