The Texas Plant Disease Diagnostic Laboratory (TPDDL) may experience intermittent closures throughout the year for holidays, facility maintenance, or staffing limitations. Below are the planned dates the TPDDL will be closed. Please refrain from sending samples that will arrive on these dates.  2025 November 26–28 December 18–31 2026 January 1–2 January 19 February 9 March 9–13 April 3 April 13 May 25 June 8 June 19 July 3 August 10 September 7 October 12 November 23–27 December 14-31 January 1, 2027

How to Take a Sample Submit only one plant type per sample. Collect live, symptomatic tissue: The lab needs living tissue to identify the pathogen. Place samples in resealable plastic bags; use paper bags for fungal tissue. Include a range of symptoms: Collect leaves or sections showing different stages of the disease, from early signs to more advanced ones. Do not send dead or dried plants. Poor samples may be rejected or undiagnosable. Blot wet foliage dry with paper towels to prevent rot. Refrigerate samples until shipping; avoid… Read More →

This annual report contains data from the TPDDL located on the Texas A&M University campus in College Station, TX. 2024