My orchid leaves are yellow and black, are there any bugs, what should I do?

Updated on home 2024-07-26
7 answers
  1. Anonymous users2024-02-13

    There is too much water, and the roots are broken. It should be replanted in time.

  2. Anonymous users2024-02-12

    It is recommended to change the soil, which may be a problem with the soil quality.

  3. Anonymous users2024-02-11

    It may be due to the presence of pests and diseases, or because of not watering and fertilizing in time, or because the soil is not fertile enough, or because it is not kept in sufficient light.

  4. Anonymous users2024-02-10

    The main reason is that there is a lack of water, so this situation will occur, and secondly, it will be caused by the lack of nutrition, so you must pay attention when planting.

  5. Anonymous users2024-02-09

    It is likely to be caused by improper watering, or it may be caused by insufficient light exposure, so be sure to take good care of the plants.

  6. Anonymous users2024-02-08

    The blackening of orchid leaves may be caused by the air being too dry, the moisture imbalance of orchid leaves, which is common in winter, can be sprayed to increase air humidity and prevent orchid leaves from blackening, and at the same time pay attention to avoiding rain, in the high temperature and rainy season, the pot should be placed in semi-shade and will not be drenched by rain.

    It may also be the blackening of orchid leaves caused by improper water and fertilizer control, and the usual watering follows the principle of seeing dry and wet, so that the soil is in a slightly wear-resistant and moist state. If the potting soil is too little watered, it is necessary to soak the potting soil in time, and if the potting soil is seriously waterlogged, it is necessary to re-potting the plant. The fertilization method of thin fertilizer and frequent application is adopted, and the diluted fertilizer needs to be watered with water if the fertilizer is too much, and the top dressing should be applied when the nutrients are lacking.

    It may also be the blackening of orchid leaves caused by bacterial infection, such as brown spot, anthracnose, black spot, leaf blight and blight. The leaves that have been infected with the disease need to be cut off in time, if the leaves are partially cut, the normal leaf color part needs to be cut by 1 cm more to prevent re-lesions, which is called the source of disease.

    Growth habits of orchids

    Orchids prefer semi-shaded and warm and humid environments, and must be moved indoors for wintering in central China. Orchids are mostly wild in the valley under the sparse forest, containing humus-rich, well-aerated and water-permeable slightly acidic soils. The roots are 50-80 cm long and are distributed in the topsoil.

    It grows most luxuriantly in the semi-shade under the tree, but not as much as the plants in the dry place with more sunlight and slightly yellow leaves, and requires full sunlight in winter.

    The root system of the orchid needs to be symbiotic with the orchid fungus, otherwise the growth will be poor and the seeds will not germinate. Do not fertilize in early spring when the temperature is below 15 degrees, and when the temperature rises to 18 degrees Celsius and 25 degrees, you can apply fertilizer in an all-round way. Do not fertilize orchids when they are not potted, do not fertilize weak seedlings, and do not fertilize orchids if their roots are not strong.

  7. Anonymous users2024-02-07

    1. Adjust the temperature reason: the orchid is not cold-tolerant, if it is invaded by the low-temperature burning ruler, its roots and branches will stop working, and the tips of the leaves will turn black. Workaround:

    In winter, it should be moved to a warm leather stove to warm the sleepy place to avoid frostbite from low temperatures. Don't rush to move out in the spring, because the temperature is unstable in early spring, and there are often cold snaps, so when the temperature is completely stable, move it outside.

    2. Proper shading reason: it does not like strong light, if it is directly irradiated by a strong sun, there will be a phenomenon of blackening of the leaf tip. Workaround:

    It needs to be exposed to astigmatism, and it needs to be properly shaded at noon when the sun is heavy. In winter, the daylight is relatively short, and the sun is not strong, so there is no need for shade, so it can receive all-day sunshine.

    3. Reasonable watering reasons: orchids are not waterlogged, and too much watering is easy to make the potting soil waterlogged, which will affect its root respiration, and the leaf tips will be black. Solution: Watering should not be too much, once a day when the temperature is high, and once every two days when the temperature is low.

    4. Reasons for reducing fertilization: orchids do not like thick fertilizer, which is easy to burn roots, and if there are health problems, the leaf tips will turn black. Workaround:

    Fertilization should be applied with light fertilizer, and the fertilizer should be about ten centimeters away from the roots, so that the roots will not be burned. When watering, pour water on the fertilizer so that the water spreads out with the fertilizer so that it can absorb it.

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