Help Detect Destructive Ramorum Blight!

Meg Williamson
Plant Problem Clinic

You can help to prevent the introduction of Ramorum blight into your home landscape and South Carolina's forests! The Clemson University Plant Problem Clinic is running a second survey (from September through November 2010) to detect this destructive pathogen in home landscapes. The first survey ran from February through May 2010. Ramorum blight is caused by Phytophthora ramorum, an exotic, cool-season pathogen that has been killing oak trees and related species in the coastal forests of California and Oregon. The disease in oaks is called Sudden Oak Death, but it starts as Ramorum foliar blight on woody shrubs, such as rhododendron or mountain laurel, and moves to oaks from these hosts. If this pathogen were to become established in Eastern forests, the effects could be equally as devastating to the oak population as chestnut blight was to chestnuts. For more details about this disease as well as a questionnaire which will help you determine if your plants may be infected, see the brochure, Ramorum Blight Residential Survey. The brochure also includes a submission form, and qualifying samples will be free of charge.

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This information is supplied with the understanding that no discrimination is intended and no endorsement by the Clemson University Cooperative Extension Service is implied. All recommendations are for South Carolina conditions and may not apply to other areas. Use pesticides only according to the directions on the label. All recommendations for pesticide use are for South Carolina only and were legal at the time of publication, but the status of registration and use patterns are subject to change by action of state and federal regulatory agencies. Follow all directions, precautions and restrictions that are listed.