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It is considered a pest of coconut palm trees, causing considerable damage to the trees, and reducing the plant's yield significantly and can be a major problem where coconuts contribute to the economy. The species exists on coconut palms through its life stages from larval to moth, and utilizes the tree fronds as a main source of nutrition.
Spots and discoloration areas can be smaller than 0.25 inches (6.4 mm) in size, but under optimal conditions can grow much larger eventually forming lesions. The spots will often turn a grayish color and will be outlined in black. Extreme wilting and a drying appearance on the leaves is also a major symptom of Pestalotiopsis palm. [1]
The reduction in leaf area on the damaged fronds results in a reduction of the number of nuts produced, and in newly planted palms the beetle can destroy the growing point of the palm resulting in its death. Mature palms may also die after extremely heavy attacks. [5] [3] [16] [17] Coconut palm in Hawaii, heavily damaged by Oryctes rhinoceros ...
Bardomiano Bautista-Perez, 39, became pinned by the fronds as he worked halfway up giant tree
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Image credits: Ross Burgener Meanwhile, for Dr. Brandon, the most beautiful natural phenomenon is the northern lights, whereas the most fascinating is the diel vertical migration.
Bayoud disease is an epiphytic fungal disease of date palm. [1] [2] The pathogen responsible for the disease is Fusarium oxysporum f.sp. albedinis. [3] [4] [5] The disease was first reported from Morocco in 1870. The word "bayoud" is derived from the Arabic abiadh ("white"), and is a reference to the whitish discoloration of diseased fronds. [1]
At any palm age, early infection will show discoloration of the foliage, starting at the tips of the oldest leaves. The leaf colors change from the normal green to different shades of reddish-brown, to dark brown. [2] Declining palm trees are characterized by a large number of discolored leaves in the lower and mid-crown region of the tree. [5]