New Palm Diseases and Cold Damage
New Palm Disease: Texas Phoenix Palm Decline or TPPD.
There is a new disease in Florida that is killing off Canary Island Date palms, edible date palms, Sylvester palms and Sabal/Cabbage palms. This disease has been identified in Central Florida and is expected to reach Southern Florida unknowingly through movement of palms that occur widely in Florida, by spreading the disease by moving its vector and infested hosts.
TPPD is a phytoplasma disease similar to that of lethal yellowing disease of palms observed in the past in Florida.TPDD is a fatal systemic disease that kills palms quickly and is spread by sap-feeding insects known as plant hoppers. Symptoms of TPPD are similar to lethal yellowing except that root decay has been observed with TPPD.
Symptoms include:
– Premature drop of all fruits at one time
– Discoloration of oldest leaves
– Death of the spear leaf
– Decay of the root system
Diagnosis of TPPD is based on the palms symptoms and is incurable. If the spear leaf is dead then the palm will not make it and removal of that palm is recommended. The most effective way to prevent this disease is by injecting the palms with the antibiotic oxytetracycline HCI also known as OTC. Treatments should occur every 4 months for the life of the palm.
New Disease of Queen Palms and Mexican Fan Palms: Fusarium Decline
There is another disease claiming the life of Queen Palms and Mexican Fan Palms in Florida.This disease quickly kills these palms with in a few months of the initial symptoms. There is no cure once a palm is infected, and no preventive fungicide treatments are recommended.
The disease is probably spread by wind into new sites. Once it has become established, it could also spread through pruning tools used to trim infected palms. Pruning tools are being recommended to be sterilized after each palm
is trimmed. Also if a palm dies from this disease have it removed and a palm of the same kind should not be replanted into that same site.
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