Although plants can be damaged by noxious insects, such as mites and scale and the lack of fresh air, poor growing conditions and proper gardening hygiene can cause diseases to set in. One must take safeguards against insect and disease by a careful inspection of plants at least once a week. Brown spot is caused by high humidity and low temperatures, which shows up usually on the older leaves as brown spots. This can spread quite rapidly to other plants especially if grouped too close together. Leaves should be treated with a fungicide such as Banrot or Captan at monthly intervals and be sure to treat all other plants as well.
Root rot is caused by poor drainage or by excessive watering and fertilizing.
Symptoms of root rot include drooping leaves, change in the color of leaves, as tips turn a reddish brown and the loss of the plants vitality. Immediate action must be taken, by removing plant from pot, wash the roots thoroughly with fresh clean water, remove rooting roots, and re-plant in a well draining potting medium. Keep plant out of full sun light, provide good air ventilation and do not fertilize until plant shows signs of recovery. Click Here for even more information on the Genus, Rhapis and their Species. One of the best Palms for the home or office.