What is the matter with the black spots on the leaves of Molan? How to deal with the black spots on the leaves of Molan?

As people's quality of life improves, more and more people are raising flowers and plants at home, and Molan is deeply loved by people because of its fragrant flowers. So what is the matter with the black spots on Molan leaves? How to deal with the black spots on Molan leaves? The following editor will explain them one by one, hoping to help everyone.

What's the matter with the black spots on the leaves of Mo Lan?

Anthracnose is a common disease of orchids, a fungal infection. The leaves infected with anthracnose start out as black dots, which gradually expand and become surrounded by yellow halos. If left unchecked, they will form patches of black spots, eventually causing the orchid leaves to dry up and die.

How to prevent black spots on Molan leaves

1. Improve the ventilation effect of the orchid growing environment. The best state is to maintain air flow in the orchid growing environment. If the wind is too strong, it will be detrimental to the growth of orchid seedlings, and it may easily cause the orchid to fall over or the water in the planting material to evaporate too quickly.

2. Enhance light: The best light is to let the orchid seedlings receive direct light. The ultraviolet rays from the sun that pass through the glass have been almost filtered out. It is the bactericidal effect of ultraviolet rays that can effectively inhibit fungi.

3. Reduce the humidity of the orchid-growing environment: Anthracnose bacteria prefer an environment with high humidity, and their best survival humidity is around 80%. Therefore, if orchids are infected with anthracnose, it is necessary to reduce the humidity of the environment and control it at around 60%.

4. Spray fungicides more often to inhibit the reproduction of latent anthrax hyphae.

How to deal with black spots on Molan leaves

1. Eliminate the source of disease

If the orchid leaves have been infected with anthracnose bacteria on a large area, it is recommended to cut off the diseased leaves directly to prevent them from spreading the mycelium to other healthy orchid leaves. If the infected area of ​​the leaves is small, drug treatment can be used.

2. Use of medication

Usually, fungicides are used to treat anthrax. I have used carbendazim, mancozeb, anthraxthron, and thiophanate-methyl. It is best to use them in rotation.

3. Treatment methods

After adding the fungicide solution, place the orchid upside down in the fungicide solution. Generally, the water should cover the pseudobulb. After soaking in water for 30 minutes, hang the orchid upside down to control the water for an hour. This process is very critical. After potting, mix the fungicide powder into a paste and apply it to the black spots of anthracnose patients. Then manage it normally.