The black spot of orchids is mostly caused by anthracnose, which is caused by two main deep-seated reasons.

Recently, many orchid friends ask about orchid black spot disease, orchid leaf black spot is a manifestation of orchid infection virus, indicating that the virus invades orchid body, if flower friends do not pay attention to control spread, will affect orchid growth. Black spots mostly appear in summer and autumn when the weather is hot, rainy and windy.

There are many reasons for black spots, such as insufficient watering for a long time, too dry air, which will make the roots dry and wrinkle, absorb water and nutrients, and cause nutrient shortage, resulting in yellow or sharp leaves. There are orchids placed density should be appropriate, so that air circulation. Orchids are prone to black spots if there is no air circulation.

Secondly, orchids should be light fertilizer, not thick fertilizer or raw fertilizer. Such as a fertilizer too thick, especially excessive application of chemical fertilizer, often cause root injury, and then cause black spots.

Orchids grow black spots, most of which are anthrax, and there are two main reasons for their deep layers:

(1) The orchid seedlings are not strong enough, and the resistance of the orchid seedlings is weak. Its root or plant material is not ideal, orchid root grows not well, still want to work hard from plant material. Bad roots cause dark spots on leaves.

(2) Orchids are exposed to higher temperatures or the environment is sultry. After the temperature exceeds 28℃, orchids should be shaded;

At the same time, in high temperature season, the environment should be ventilated, avoid sultry situation, the key is to improve cultivation conditions,

If necessary, spray 800 times solution Shi Baogong (amidine) or Shigao.

Thank you for reading the article. If you feel helpful, welcome to pay attention to and forward it. This article comes from the original submission of Fish Milan Flower. Please contact Fish Milan Flower Public Number for reprinting!