What is the TPDDL?  The Texas Plant Disease Diagnostic Laboratory (TPDDL) is a service to the people of Texas by the Department of Plant Pathology and Microbiology at Texas A&M University, in conjunction with the Texas AgriLife Extension Service.     What are the hours and location of the TPDDL?   The TPDDL is open from 8:00 am – 5:00 pm, closed 12:00 pm – 1:00pm. Walk-in hours: 9:00 am – 4:00 pm, closed 12:00 pm – 1:00pm. The TPDDL is located at 1500 Research Parkway, Suite 130A, College Station, TX… Read More →