Oak wilt is one of the deadliest tree diseases in the United States, killing millions of oak trees across 76 Texas counties.

What is oak wilt disease and how can it be prevented? I have several oak trees on my property and am ... and sometimes fungal mats under the bark. A definite diagnosis is best done in a lab.

Oak wilt is one of the deadliest tree diseases in the United States, killing millions of trees across 76 Texas counties.

But thankfully, the winter precipitation that is unusual for the Gulf Coast likely did not affect New Orleans' plants and wildlife, experts say, from stately live oak trees to pesky mosquitoes.