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Symptoms of Lethal Yellowing in
Cocunut
Palms
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Premature dropping of coconuts in various stages of development. |
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Darkening of the inflorescence. The flowers on
a healthy inflorescence should be clear, yellowish to a light
cream color. The flowers in lethal yellowing infected palms are
dark brown to blackish. |
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The fronds start to turn yellow, begining with
the older ones and advancing towards the younger ones near the
center of the crown. Sometimes a younger frond will turn yellow.
This is called a "flag frond" This is a significant
sign of lethal yellowing, but is not always present. |
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The final stage is the death of the bud causing
the youngest unfolded frond to collapse. Sometimes there may
even be some green fronds left on the palm but the death of the
bud is equivalent to the death of the palm. In a non-treated
palm, this entire process may take as little as three to six
months. |
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