Leaf and root rot

A dark brown, dried up spot (oval in shape, 3 by 5 cm across) was found one on one of the leaves. The spot is believed to be the dried-up remains of an unnoticed leaf rot due to water droplet(s) staying too long on the leaf and lack of air circulation. The rotted tissues had dried up and the edge of the dried-up region was firm and incapable of spreading by the time it was discovered . Hence, the spot was left on the plant untouched and untreated as it did not look threatening. A few days after the rot was discovered, the leaf was abundant by the plant probably as the plant's natural survival instinct. The whole leaf turned uniformly bright yellow at a pretty fast rate, and it was dropped when the whole leaf had turned orange.

Root rot was also found on one of the visible roots near the surface of medium. The roots were able to withstand perpetual moisture without any problems for the first six months of watering regime whereby the medium remained moist between waterings. I cannot recall the watering regime or the weather conditions when the root rot occurred. Hence, the cause of root rot is unknown. The root appeared dark brown in color and was soft to the touch. The accessible part of the rotted root was removed by hand, while the rest of the rotted root were left in the pot. Neither was chemical treatment given nor was there any change in watering regime after rot was discovered.