Why is my oak dying? 

In the lush green landscape of a season with plentiful rain, memories of the record Texas drought of 2011 could fade. But hundreds of calls, emails and tree samples sent to the Texas Plant Diagnostic Lab in College Station tell a different story.
“Since the early spring to late summer, there have been many inquiries as to why post oaks have ‘suddenly’ died,” said Dr. Kevin Ong, director of the lab, which is operated by the Texas A&M AgriLife Extension Service.
“When you get a whole bunch of folks asking the same question, and they are from all over Texas -- even in the Panhandle -- you know that something widespread is up.” See the full story at today.agrilife.org