Yellow mottling or bronzing of the leaves. Significant distortion of flower and leaf buds. Fine webbing on flowers or between leaves can be seen on heavy infestations.
Small brown, white, pink or black raised bumps that can be seen on the trunk, stems and foliage. Black sooty mould fungus can also be present.
Some leaf loss is normal, however excessive loss of foliage can be caused by over or under watering, being placed in a spot with too little light, a dry atmosphere or drafts and being moved.
Adjust watering, humidity and where the plant is located.