Causes of Phalaenopsis soft rot and treatment methods for leaf rot

Today let's talk about the most common "leaf rot" in Phalaenopsis in summer, which some people also call "soft rot" or "water rot". This disease is mainly caused by excessively high humidity, insufficient light, and excessively high summer temperatures.

Typical leaf rot mostly occurs on the leaves; if it occurs on the neck, it is called stem rot, and they are all caused by the same factors. Specifically, after infection the leaves turn yellow, and when pinched with the hand they show a mark; in very severe cases, the entire leaf can be squeezed until water comes out. All of these conditions are called abnormal metabolism.

If any leaf is infected even slightly, it must be pulled off immediately, and the whole leaf must be removed. Never cut off only part of it, because only removing the whole leaf can truly stop the infection. In addition, note that after using scissors to remove it, the tools must be disinfected, or the scissors can be directly sterilized by burning them over a flame, and the cut leaves must be thrown away immediately.

Generally speaking, leaf rot is a common bacterial disease in summer, and not only Phalaenopsis can be infected; orchids such as Oncidium and Cattleya are also easily infected by this bacterium. For daily prevention, ventilation must be strengthened in summer. If it is really too hot, an air conditioner should be turned on for it, but not everyone can do this, so it is also relatively difficult to prevent. Therefore, it is recommended to detect it in time and deal with it in time, because leaf rot cannot wait; for example, if it is discovered in the morning, it may all be infected by the afternoon.
If the situation becomes severe, the sphagnum moss must be opened up again immediately and the roots trimmed again. The specific procedure is to first find hollow roots and rotten roots, and prune them all off. Then disinfect the roots with alcohol for about 10 minutes, place the roots in a cool place to dry for a day, and after drying, replace with new sphagnum moss for care.

Overall, vigilance against Phalaenopsis leaf rot must be raised, because for Phalaenopsis, summer is quite hard to endure. Methods to prevent and treat Phalaenopsis leaf rot include controlling appropriate humidity and light, maintaining good ventilation conditions, avoiding extreme temperature changes, regularly inspecting and removing diseased leaves, and using suitable fertilizer to keep the plant healthy. If necessary, a specialized fungicide can be used for control, but it must be used carefully according to the instructions.