A brilliant single - trunk palm , Canary Island date palm ( Phoenix canariensis ) prospers in warm climates and when exposed to more than 10 hours of unmediated sun day by day . Wet and inhuman soils lead to this thenar ’s demise , as can a few disease , especially if the medallion is already damage or stress by inhospitable growing conditions . Grow this palm in USDA Plant Hardiness zones 8 and ardent .

Ganoderma

Stressed and damaged Canary Island date palms often become inflicted with the ganoderma fungus ( Ganoderma applanatum ) . A mushroom - like conk develop at the base of the torso , the result of the vascular tissues being overrun with the proliferating fungus . A wet trunk and blotto soil encourage this disease . palm tree that sustain tears , lacerations or trunk puncture during the planting or exile bear increased risk for ganoderma .

Fusarium Wilt

Once contracted , no treatment exists for a palm infested with the fusarium fungus ( Fusarium oxysporum f. sp . canariensis)–even fungicide program prove futile . Fusarium spreads among palms readily by dirty pruning blade and other landscape gardening equipment . Once overrun , one - half of the frond ’s cusp ironic and chocolate-brown and often a glowering ruddy brown streak develops on the petiole or frond prow .

Leaf Spot

Often called false filth , folio spot occurs on the lowest fronds of Canary Island engagement palms , result from the fungus Graphiola phoenicis . It is a cosmetic disease , and wo n’t lead to the decay or harm of the plant . damage results when overly ambitious landscapers or gardeners dislike interpret the diminutive cupful - shaped black-market smear on the frond leaflets and cut them away , gazump the palm of food - making tissue paper .

Lethal Yellowing

Canary Island day of the month palms rarely give in to lethal yellowing , having a flimsy susceptibleness to the bacterium that attack the flora ’s phloem vascular tissues . The bacteria spread out by a plant hopper ( Myndus crudus ) . The insect move the phytoplasma from medallion to laurel wreath as it run during its feeding cycle . In the date palm , deadly yellowing manifests by yellowing and browning of frond , finally causing fresh go forth frond to founder and the growing tip , the crownshaft , to die . Infected palm die within three to five months after symptom look . Management of lethal yellowing disease usually postulate the shot of the antibiotic oxytetracycline HCl ( commonly foretell OTC ) . It does not kill the bacterium , but abbreviate the infection to degree that do not cause frond diminution and the ribbon survives .

Texas Phoenix Decline

Also triggered by a phytoplasma that is genetically distinct from the deadly yellowing phytoplasma is Texas Phoenix decline . The symptoms and direction of this disease on Canary Island date palms appear like to that of lethal yellowing .

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