1. 
   oak wilt
   (from the article `wilt`) Oak wilt, caused by the fungus Ceratocystis fagacearum, is a serious disease in the eastern half of the United States. All oaks (Quercus) are ...
   Found op http://www.britannica.com/eb/a-z/o/1
   
   
2. 
   Oak wilt
   Oak wilt is a fungal disease that can quickly kill an oak tree. It is caused by the fungus Ceratocystis fagacearum. Symptoms vary by tree species but generally consist of leaf discoloration, wilt, defoliation, and death. The fungus is spread from diseased to healthy trees by insect vectors or via c...
   Found op http://en.wikipedia.org/wiki/Oak_wilt
   
   

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