Wanting a second opinion if there are any tree professionals out there .
I have a white oak Tree about 25 ft tall that has a dozen borer holes in it.
I'm sure it needs to be cut down as the holes have penetrated the centre of the trunk. I have sprayed the borers but they have done too much damage i think.
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Thanks for the reply Jason.
I have has two people look at it now ( not professional tree workers ) and their opinions are the same as mine. The centre of the trunk has been bored through and in high win tree could come down on the house.
So a desperate last attempt to save the tree as its quite nice and provides shade, so hopefully i can get a pro opinion.
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Hey @swanny & welcome.
Seriously disappointing to see the damage done. Loosing a semi-mature tree is always sad.
Okay, the issue with borers and the damage they do is multi-layered. Their damage often runs deep so what you see may just be the tip of the iceberg. The damaged areas become very prone to damage from secondary problems such as fungal diseases further decaying the heartwood.
Simple fact is that an attack this severe damages the supporting tissue of the tree and it becomes unacceptably weak and therefore dangerous so I’s agree with what others have said - it has to be removed, especially as it’s so close to the house.
Unfortunately you can’t do much about future attack beyond keeping other trees healthy and watching for the early stages.
The first sign is what’s often called ‘frass’, this is the sawdust like material that the borers poo out as they eat their way into the tree. When I find the frass and holes early enough I flood the hole with some pyrethrum spray and generally the grub will drop out dead in seconds.
Borers are in-fact the larvae of beetles, most often longicorn (longhorn) beetles, and they are active at particular times of the year. Spraying will achieve little as the ones that did the damage are gone and you have no idea whether others are present. Spraying will likely just kill good bugs while achieving little or nothing in the way of pest control.