Toomer's Corner oaks poisoned with herbicide; unlikely to survive AUBURN – Auburn University today confirmed that an herbicide commonly used to kill trees was deliberately applied in lethal amounts to the soil around the Toomer's Corner live oaks on campus, and there is little chance to save the trees. More information and ongoing updates as to treatment and prognosis are available on this site.The City of Auburn Police Division is investigating the situation, and the application of this herbicide, known as Spike 80DF, or tebuthiuron, is also governed by state agricultural laws and the Environmental Protection Agency. The university does...