How to prevent and treat black spots on orchid leaves?

Black spots on orchid leaves are a very frustrating problem. Today I will share with you how to prevent and treat black spots on orchid leaves.

How to prevent and treat black spots on orchid leaves:

Caring for orchids is fairly demanding, and the slightest carelessness can cause black spots on the leaves. For example, when watering from overhead, soil from the pot is easily splashed onto the leaves, scorching them. When fertilizing, if the fertilizer solution gets on the leaves and is not immediately rinsed off with clean water, black spots and scorching will appear on the leaves. In spring and summer, if shade is not provided, the orchid leaves will turn yellow and scorch under the blazing sun. Placed in an environment with a lot of coal smoke, orchids develop black spots from the smoke damage. In addition, when orchids are affected by anthracnose, black spots often appear on the leaves.

Orchid anthracnose is especially likely to occur, and sometimes even becomes quite serious, in the high-temperature plum rain season with poor ventilation or in seasons of continuous autumn rain. Its symptoms are as follows: at first only semicircular or round brown spots appear on the leaves, which gradually develop into dark brown; many lesions expand into strip-shaped dark brown spots, and later the center of the lesion turns grayish white, covered with many small black dots. The disease is most often seen in the middle and upper parts of the leaves. When this disease is found, the diseased leaves should be cut off. When it is first discovered, in addition to improving ventilation, you can spray New High Lipid Film together with targeted fungicides, once a week for 3 to 4 consecutive sprays, which can achieve fairly good results. To prevent infection by pests and diseases, orchids should not be placed too crowded or too densely together, and the leaves should be kept from crossing over one another; a well-ventilated environment with good light penetration should be maintained.