What to do if ivy leaves turn black

1. Disease

Blight is the most likely reason why its leaves turn black. If we don’t know whether this is the cause of this phenomenon, then we can take a look at what the disease looks like. Generally speaking, most of the leaves of plants infected with this disease will turn brown and begin to rot slowly, while the bottom of its stems will also turn dark green, gradually soften, then turn brown and finally turn black. In addition, leaves will wilt where the disease occurs, and some will have their tops rot and possibly die.

This disease usually occurs when humidity is high and spreads quickly. Therefore, once we determine that it has this disease, we must pull out the diseased plants in time and increase the watering interval. In addition, when we are taking cuttings, we must also pay attention to selecting branches that are free of diseases and insects, and the substrate must be made sure to be sterilized. The cuttings should not be too dense, and ventilation and light transmission must be ensured. When it rains, we must drain the water in time, otherwise this disease will easily occur. When the disease first occurs, we can consider using drugs such as metalaxyl or chlorpyrifos to control it.

2. Botrytis cinerea

The symptoms of this disease are water stains or black spots on the edges of the leaves. In more serious cases, this disease can invade the entire leaf. The way to treat it is to control watering and fertilization, remove the diseased leaves, and then treat it with chlorothalonil.