Early symptoms are a stippled and silvery appearance on the lower surface of mid-canopy and older leaves (Fig. 1). The black speckles on the silvery surface are the excrement from feeding juvenile thrips. Affected tissue eventually becomes necrotic (Fig. 2).
Sucking of juices in the leaves by juvenile thrips result in the observed symptoms.
There are few reports of thrips feeding on palms, but they occasionally cause significant damage on several species of palms in Florida.