What medicine should be used for stem rot in Phalaenopsis? Detailed explanation of causes and solutions

Growers of Phalaenopsis have probably all heard of "stem rot." Once a Phalaenopsis gets this disease, the leaves droop and the stem rots at the core, and if it is not treated in time, the whole plant may die. Today let's talk about how this disease comes about, what medicine to use, and how to save it.

How does stem rot find its way in? The main cause is too much moisture, especially water accumulating in the stem and leaf core. If you pour water forcefully into the leaf core when watering, or do not promptly drain the water in the saucer after rain, the stem stays soaked in water for a long time and is very likely to be targeted by fungi, and then slowly rots.

Then there is improper temperature. Phalaenopsis likes 20 to 28 degrees. If the temperature fluctuates and the environment is also humid, fungi multiply wildly, and the stem quickly becomes soft and black. Also, if the stem is accidentally injured when repotting and not treated in time, bacteria will take the opportunity to get in and do damage.

So what medicine should be used for stem rot? There are several commonly used ones: carbendazim, thiophanate-methyl, and hymexazol are all "good hands" at dealing with fungi. If you find that the stem is a bit soft and discolored, immediately dig out the diseased plant, use clean scissors to completely cut off the rotted part until healthy tissue is exposed, then sprinkle some carbendazim powder on the wound and put it in a ventilated place to dry for a day so the wound can scab over.

If the rot is not too severe, you can also drench the roots with a diluted hymexazol solution, following the instructions for the ratio. Do not make it too strong, or it will damage the roots. After drenching, put the flowerpot in a well-ventilated place so the potting soil dries quickly and is no longer stuffy.

Besides using medicine, the key is prevention from the source. First, do not water too forcefully. Water along the edge of the pot, not onto the leaf core and stem. It is like feeding a child, you have to be careful. Pour out the water in the saucer in time, and do not let the flowerpot sit in water.

Second, the environment should be ventilated. Even if it is placed indoors, open the windows every day to let in some air. When air circulates, fungi are less likely to breed. Do not let the temperature be too extreme. In winter, do not let it go below 15 degrees, and in summer, do not let it go above 30 degrees. Give it a comfortable little environment.

When repotting, be gentle and do not bruise the stem and root system. It is best to first expose the new pot and new soil to sunlight or disinfect them with carbendazim to eliminate hidden disease risks.

Actually, stem rot looks scary, but as long as it is discovered early and treated in time, most Phalaenopsis can be saved. Growing orchids is like caring for a patient; you have to observe carefully and not let a small problem drag on into a big one. Usually pay more attention to the condition of the stem, keep it dry and ventilated, and Phalaenopsis can grow steadily and bloom even better.