Phytophthora ramorum

Department of Crop Sciences
University of Illinois at Urbana-Champaign

Screening questions to determine the need to submit
a plant sample for Phytophthora ramorum testing

The pathogen P. ramorum does not travel well by wind or air currents. The most likely pathway for introduction to Illinois is on infected nursery stock. When determining if a plant could potentially be infected with P. ramorum, these are some helpful questions to keep in mind:

Information on other plant diseases and disorders is available through the University of Illinois (

Direct questions to the University of Illinois Plant Clinic , 217-333-0519, or visit the Plant Clinic web site at