The Texas A&M Veterinary Medical Diagnostic Laboratory, TVMDL, offers four options to identify a plant and determine its toxicity.


Travis Mays

Analytical Chemistry Section Head


483 Agronomy Road
College Station, TX 77843

M-F 8:00 a.m. – 5:00 p.m.

Texas is home to countless varieties of plants. Several varieties are toxic to certain animal species while other varieties may be toxic only under certain environmental conditions. The Texas A&M Veterinary Medical Diagnostic Laboratory, TVMDL, offers four options to identify a plant and determine its toxicity. Depending on the testing option, clients may submit an animal’s stomach contents or samples of the plant in question.

Clients may also consider using TVMDL’s digital toxicology option. This option allows clients to submit images of plants via email or through TVMDL’s mobile app, rather than ship samples of the actual plant. TVMDL encourages clients interested in plant identification to schedule a consultation with one of TVMDL’s veterinary diagnosticians.


TVMDL tests thousands of specimens from clients across Texas, in neighboring states and around the world every business day, protecting the health of livestock, poultry, companion animals, exotic animals, racing animals and wildlife. Veterinarians, animal owners, animal industries and government agencies depend on TVMDL’s expertise for early detection and control of diseases. TVMDL also belongs to a nationwide network of laboratories that provide surge-testing, response and recovery capacity in the event of an animal disease outbreak. Over its history, TVMDL has played a critical role in recognizing and containing outbreaks of anthrax, avian influenza, chronic wasting disease, equine piroplasmosis and many other economically devastating animal diseases.

General Testing

For inquires about available tests, specimen types, test prices, or turnaround times, please refer to the <a href="https://tvmdl.tamu.edu/tests/">TVMDL test catalog</a>. Clients may search the catalog by a test’s name or test code. The test catalog may also be accessed via the TVMDL Mobile app.


TVMDL does not see or treat animals. If you have clinical requests or need immediate assistance with an animal emergency, please contact a veterinary clinic.

Looking for solutions in your county? Contact your local extension experts

More choices in Weed Control

  • Publication

    Ponds are nutrient sinks-a place where incoming nutrients from the watershed accumulate over time. This makes ponds the perfect place for aquatic vegetation to grow, often negatively impacting evaporation rates, recreation, aesthetic value, fish, and wildlife habitat. Preventing aquatic vegetation from entering or becoming established in a pond can save time and money in the […]

  • Publication

    Weed control in spinach is fundamental to a producer's economic viability. However, in the past decade, few new herbicides have been registered for use in spinach. This publication outlines the primary weed pests of spinach, integrated weed management strategies, and recent research findings as they influence current best practices for controlling weeds in spinach. (20 […]

  • Publication

    Soil solarization is an environmentally friendly method of using the sun’ power to control pests such as bacteria, insects, and weeds in the soil. This publication explains how home gardeners and crop producers can solarize their soil to significantly reduce weeds long and short term. Also outlined are the results of two research trials to […]

  • Publication

    This 2-page quick reference guide for common rangeland and pasture herbicides includes information on active ingredients, trade names, grazing restrictions, hay harvest restrictions, and rainfast intervals. Each entry indicates whether an applicator license is required. (2 pages)

  • Publication

    The tropical sod webworm can cause significant damage to managed turf very quickly. This publication explores this pest's life cycle and geographic distribution as well as how to identify the larval stage and the damage it causes. Sources for treatment recommendations are included. (2 pages)

  • Publication

    When performed properly, mowing is used to maintain a particular turf grass height and appearance that supports the specific use and aesthetic expectations of that area. This publication details several mowing factors and recommendations for warm-season turf grasses. (4 pages)