1、 What is it

Orchids have black spots on their leaves, usually caused by anthrax. The disease will produce black spots on the leaves in the early stage. At first, it is very small, then it will expand slowly, and eventually lead to the drying of the whole leaves. As one of the common diseases, in addition to treatment, it also needs certain prevention and treatment methods

2、 How to treat

1. Pruning diseased leaves: cut all the leaves with black spots of orchids. As anthrax is very easy to spread, it is important to avoid the presence of diseased leaves. Do not discard the diseased leaves after cutting them. It is best to burn them collectively, which can also be effectively sterilized

2. Drug Sterilization: in addition to bacteria on the leaves, there may be residues of bacteria in the pot soil of cultivated orchids. It needs to be sprayed with chlorothalonil. If the situation is serious, the plants need to be taken out and soaked in tobuzin solution for disinfection

3. Replanting and maintenance: sterilized orchids can be replanted into new pots and soil to avoid further infection with bacteria. After replanting, pour water and put it in a cool and ventilated place. Do not spray water for a short time, which is not conducive to wound healing. After that, spray disinfectant every few days. Generally, it can be completely cured in about 20 days

4. Follow up prevention: most of the reasons for orchid anthrax are poor environment. It is necessary to strengthen the ventilation of the environment to avoid the lack of air circulation, and appropriately reduce the humidity. Air humidity is the key to breeding bacteria. You can put some desiccant indoors to reduce the humidity