Rhizoctonia root rot, also known as English ivy root rot, can be easily identified by the appearance of wilted, matted leaves of English ivy on the soil surface. When affected by this fungal disease, the leaves of the ivy plant tend to lose their vitality and become limp, giving them a wilted appearance.
One distinctive characteristic of Rhizoctonia root rot is the presence of fungal hyphae that can be observed on the affected leaves. These hyphae often form a dense network, resembling spider webs, which can hold the wilted leaves together in mats. This web-like structure is created by the fungal mycelium, which is the vegetative part of the fungus.
It is important to note that the severity of symptoms may vary depending on the stage of infection and the overall health of the affected plants. In some cases, the wilted leaves may be scattered across the soil surface, while in others, they may form concentrated mats. The mats of leaves can sometimes appear discolored, turning brown or black due to the presence of the fungal pathogen.
When examining the affected plant, it is advisable to gently lift the wilted leaves and inspect the root system. Rhizoctonia root rot can cause the roots to become discolored, turning brown or black. In severe cases, the roots may also become soft and mushy, indicating advanced decay.
In addition to the visual symptoms, the presence of a musty or earthy odor around the affected plant can also be an indication of Rhizoctonia root rot. This odor is caused by the metabolic activities of the fungus as it breaks down the plant tissues.
In my personal experience, I have encountered instances of English ivy root rot in both landscape settings and greenhouse production containers. In one particular situation, I noticed a patch of English ivy with wilted leaves and a dense mat of fungal hyphae on the soil surface. Upon further examination, I discovered discolored and decayed roots, confirming the presence of Rhizoctonia root rot. This experience highlighted the characteristic symptoms of the disease and the importance of early detection to prevent further spread.
To summarize, English ivy root rot, or Rhizoctonia root rot, can be identified by the presence of wilted, matted leaves on the soil surface. These leaves are often held together by fungal hyphae, resembling spider webs. The roots of affected plants may also show signs of discoloration and decay. Additionally, a musty or earthy odor may be present around the affected plant. It is crucial to monitor and address these symptoms promptly to prevent the spread of the disease.