In the photo below the SM is showing the symptoms of the disease. We can see that the new fronds is unaffected. That is a good omen. Hopefully this tree will recover.
These photographs show another palm with bended fronds symptom and a closeup at the bended point that eventually snapped. Also visible a Valanga nigricornis near the snapped point (this insect is not the culprit of this disease).
Another disease I notice is the rotting crown, where, in the following photo you can see the youngest shoot develop necrosis midway of young frond. I pretty sure it is caused by a fungus yet to identify (please help).
During the field visit, old Coleoptera attack was noticed. However there is no fresh damage on young leaves. This does not need to be controlled at the time but a surveillance team should be formed and do the census and determine the economic threshold.
Anyone who have the experience with these problem please advise. Thanks.
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