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What kind of testing can the TPDDL perform?
The TPDDL can assist with any type of plant disease problem. Field crops, trees, turfgrass, vegetables, fruits, flowers, shrubs, houseplants, or any other type of plant are welcome. Lab tests are available for the detection of most plant pathogens. We can only test soil for nematode detection. For testing of most diseases of Upper Plains field crops, please contact the THPPDDL. * For palm phytoplasma detection, please see the following document for sampling guidance: Sampling Guide for Palm Phytoplasma For nematode detection assay, see form D-827: https://plantclinic.tamu.edu/forms/d827/ For commercial grape growers, see form D-1004: https://plantclinic.tamu.edu/forms/d1004/
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.
If my plant is completely dead, can I still send it in for testing?
Dead plants may be overrun with saprophytes or secondary pathogens, making diagnosis difficult and leading to inaccurate results. Accurate disease identification, diagnosis, and management recommendations are dependent upon appropriate specimens and thorough background information. A good sample is taken from symptomatic material or the transition zone between healthy and declining material.
What if I need testing not listed on the website?
For specific tests that do not have a specified form, please use FORM D1178 – General Diagnostic Service Form and note the requested test in the Comment section. Specific requested testing may incur additional charges. Please contact the TPDDL at plantclinic@tamu.edu if there is a need for specific testing of plant material for plant disease problems.
