I have a 70 foot white oak tree that is dripping sap all over my deck. Does this mean the tree is dying? Is there something wrong with it? I have never had this happen from this oak before. When will it stop?
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Something has attacked your tree and is drilling or eating (possibly very tiny) holes in it. If you care a lot about this tree you might want to think about consulting an arborist as soon as possible. It may need to be sprayed with something.
Yeah, you've probably got some type of beetle, or perhaps birds like sapsuckers or woodpeckers.
I think you should first check if the liquid falling from your oak tree is sticky or not, if it is sticky it could come from aphids, check if you can see many ants climbing along the tree trunk. If it is not sticky it could be only water. In a hot summer an adult oak tree can sweat up to 500 liters of water per day. In the morning you can see the little drops of water at the end of the leaves. I think you should check using binoculars because it would be a pity to treat the tree if it is just a natural phenomena.
Aphids are not a threat for an oak tree but you could try growing plants that attracts ladybugs next to your oak tree and protecting the green or brown stink bugs in your garden. Ladybugs are good predators of aphyds but they can fly far away from your garden when stink bugs don't fly so far.
Hope this helps!
Catherine
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