Ornamental Disease Management

Melanie Lewis Ivey  |  10/2/2014 10:11:16 PM

Ornamental Disease

Disease Spotlight
Leaf and crown rot of liriope (lily turf) are caused by the common plant pathogen Phytophthora palmivora. This pathogen favors moderate temperatures and abundant soil moisture and can be easily spread between container plants in irrigation water and by rain splash.

Symptoms: Early symptoms of leaf and crown rot include yellowing of the leaves from the the base of the leaves upward. As the disease progresses, the base of the leaves begin to rot and turn brown, and the plant dies.

Management: All species and varieties of liriope are susceptible to Phytophthora palmivora. As such, the best management strategy is to prevent the entry of the pathogen into the landscape through the use of disease-free plants. The use of good cultural practices, including site selection, water management and sanitation, can go a long way in preventing disease spread in the landscape. Information on the use of fungicides to manage leaf and crown rot of liriope can be found in in the LSU AgCenter Disease Management Guide.

Please send me an email if there is an ornamental crop disease you would like me to spotlight.

Ornamental Disease Factsheets
Boxwood Blight (NC State University) Camellia Flower Blight
Entomosporium Leaf Spot of Hawthorne and Red Tip Photinia Leaf Galls of Azaleas and Camellias
Impatiens Downy Mildew Oleander Leaf Scorch
Plant Disease Facts-On-Line Series


Ornamental Disease Management Resources
Southeastern Ornamental Horticulture Production and Integrated Pest Management The Knowledge Center-Boxwood Blight
Louisiana Plant Pathology Blog (Archives Only)


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