Types of Testing Offered
We accept samples from any type of plant, including field crops, trees and shrubs, turfgrass, vegetables and fruits, flowers, and houseplants. We offer lab testing for most plant pathogens. Soil testing is limited to nematode detection. For disease affecting Upper Plains field crops, please contact the Texas High Plains Plant Disease Diagnostic Laboratory (THPPDDL).
Plant sampling submission guidance can be found on the ‘Plant Sampling‘ and ‘Submission Forms‘ tabs.
Specialized Testing Available
Please contact the TPDDL at plantclinic@tamu.edu if there is a need for specific testing of plant material for plant disease problems.
Turnaround Time
Turnaround depends on sample volume and season:
- Routine diagnoses: Typically completed in 11-21 days during peak season (spring-fall).
- Extensive testing: May take longer (e.g., oak wilt testing requires a minimum of 21 days).
Results are usually emailed, but can be mailed upon request.
Services We Do NOT Provide
The TPDDL does not provide the following services to our clientele:
- Pesticide residue determination in and/or on plants and soil
- Soil nutrient levels, soluble salts, or plant tissue analysis (Contact Soil Testing Lab at http://soiltesting.tamu.edu)
- Mycotoxin testing (Contact Texas High Plains Disease Diagnostic Lab at https://thppdd-lab.tamu.edu/services/mycotoxin-testing/)
- Assessing feed and fertilizer hazards related to animal and human health and the environment (Contact Office of Texas State Chemist at http://otsc.tamu.edu for private lab listing)
- Plant identification (Visit https://texnat.tamu.edu/about/plant-identification/)
- Regulatory and enforcement (Contact your regional TDA office at https://www.texasagriculture.gov)