We've had a ficus tree for over 30 years in the home. It's more than 8 feet tall and has been repotted 3-4 times in its lifetime; the most recent repotting occurred about 7 months ago. Shortly after being repotted the ficus started getting large brownish white spots with tiny black dots and is frequently dropping leaves. What disease is this and how can we cure the plant? We really don't want to lose it after all these years! Thanks!
