Olive trees (Olea europaea) are susceptible to Ganoderma root rot, a soil-borne fungal disease. The infection enters the tree through wounds on the roots and at the ground level of the trunk. Infected trees slowly decline and eventually die. There is no treatment for Ganoderma root rot.
About this Author
Melody Lee worked as a newspaper reporter, copywriter and editor for 5 years. In addition, she has edited magazine articles and books. Lee holds a degree in landscape design and is a Florida master gardener. She has more than 25 years of gardening experience, which includes working at nurseries and greenhouses.