Stem Rot of Lily of the Valley and Its Control

Stem rot of lily of the valley

When stem rot occurs in lily of the valley, it will harm the stems, leaves and inflorescences of the plant.

In the early stages of the disease, there will be light yellow or light gray spots on the stems and leaves infected with stem rot, which will then gradually expand into dark brown and sunken spots. When the humidity is very high, the inflorescence will be damaged and rot. After rot spots appear at the base of leaves or stems, they may spread upward or downward, which often causes the plant to fall over. In the later stages of the disease, a gray mold layer and rat-feces-like substances will appear on the lesions.

Stem rot is caused by a fungal infection, which can develop quickly when humidity is high and ventilation is poor. Cut flowers placed in a damp paper bag overnight are susceptible to stem rot.

Control of Lily of the Valley Stem Rot

First of all, we must reduce the possibility of fungal infection and pay attention to ventilation. When stem rot occurs, we must deal with seriously diseased plants as soon as possible. It is best to burn them. Diseased plants must not be used for division reproduction. If lily of the valley is infected with stem rot, you can spray 1:1:100 Bordeaux mixture or 500 times diluted 65% Mancozeb wettable powder at the early stage of the disease. In order to prevent lily of the valley from contracting stem rot, we must also strengthen management. Do not plant lily of the valley in places or near places where peonies, peonies and other flowers and trees have been planted. Do not use scissors that have been used to cut diseased peonies or peonies to prune lily of the valley. Do not prune when the plant is wet. This can prevent lily of the valley from contracting stem rot.