Dtps. Yu Pin Burgundy
My Dtps. Yu Pin Burgundy is a big healthy phalaenopsis hybrid, with two nicely growing spikes, and an extensive root system. That is why I was particularly troubled to spot a rotting root with what looks like a fungal growth through the clear plastic pot. Normally, I'd take that as a sign to immediately repot, and cut off the affected root. But I would hate to jeopardize the blooms.
A diseased root
The picture above shows the affected root. The rest of the pot is dried out, so what looks like moisture is all coming from the root rotting.
I soaked the orchid in physan-treated water today. But I am really questioning whether that is sufficient to keep this infection from progressing.