I have a large, mature water oak growing in my yard that has me concerned. There is a large cavity in the trunk. I’m not sure if I should fill this up with something like concrete. Also, I have seen ...

Oak wilt is a fungus that spreads through a tree's water system, causing it to wilt and die. The fungus was confirmed in the park on Oct. 6, and nearly 30 trees have been cut down. Nearly 30 oak trees ...