Orchid fungus, specifically the Botrytis fungus, can cause some noticeable changes in the appearance of orchid flowers. When infected, you may observe small, brown necrotic spots on the petals or other parts of the flower. These spots can vary in size and number, and as the infection progresses, they may expand and become more numerous. Sometimes, you may notice a pale pink margin surrounding the brown spots, which adds another distinct element to the visual appearance.
In more severe cases of Botrytis infection, the individual spots may start to merge together, forming larger affected areas on the flower. This coalescing of spots can give the flower a more patchy or blotchy appearance. Another characteristic feature of advanced Botrytis infection is the presence of gray, webbed fungal growth, known as mycelium. This fungal growth may become visible on the flower, often appearing as a delicate, cobweb-like layer.
Personally, I have encountered orchid fungus on a few occasions in my gardening experiences. It is always disheartening to see the beautiful orchid flowers being affected by such a fungal infection. The brown necrotic spots, sometimes accompanied by the pale pink margin, can make the flowers look unhealthy and unattractive. When the infection progresses and the spots merge, it becomes even more noticeable and concerning.
The presence of the gray, webbed mycelium is particularly alarming, as it indicates an advanced stage of the infection. Seeing these delicate fungal threads on the flowers can be quite distressing, as it gives a clear visual representation of the damage being caused by the Botrytis fungus.
To summarize, orchid fungus, specifically the Botrytis fungus, can be identified by the presence of small brown necrotic spots on the flowers. These spots may increase in size and number, sometimes surrounded by a pale pink margin. In severe cases, the spots can merge, forming larger affected areas, and gray, webbed fungal growth may become visible. It is essential to identify and address orchid fungus promptly to prevent further damage to these beautiful flowers.
