The Texas Plant Disease and Diagnostic Lab at Texas A&M University will test samples of diseased leaves from trees/shrubs and samples from lawns showing possible signs of disease.
Please read the directions for payment and collection of samples. NOTE: They do not want DEAD LEAVES! Living tissue is best for diagnostic purposes. For a lawn sample, a 4″-6″ divot with about 1″ of soil/roots taken from the area NEXT TO the affected area (transition zone) is preferred to sending a sample of dead grass. Tree/shrub leaves that are just beginning to show symptoms are preferred to leaves that are already dead.
Print the submission form D1178 and fill it out to the best of your ability.
I like to “overnight” the specimens via USPS on a Monday so that they receive fresh samples early enough in the week for testing.
Click HERE for the link to the website.