Ship in an ice chest with a frozen freezer block. Ship by bus, overnight mail or bring in person to the laboratory. The samples should be shipped on a Monday, Tuesday or Wednesday. The samples will arrive at the laboratory, so that they can be processed that week. Results from the isolations will be available in 2 to 3 weeks.
Reply time depends on how fast the fungus develops in culture.
As a rule of thumb, the roots extend beyond the trunk 2.5 to 3X the distance between the trunk and the tree's drip line. Contact your County Extension Agent, County Extension Horticulturist, Texas Forestry Representative or Extension Plant Pathologist for more information on oak wilt. The information given is for educational purposes only. Extension programs serve people of all ages regardless of socioeconomic level, race, color, sex, religion, disability or national origin.