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Key plants are ones that frequently have diseases and should be monitored on a regular basis. In some locations, key plants should not be used if the amount of maintenance work required for the site looks well at all times must be minimized.
Key pathogens/diseases (in bold) are those that frequently occur on the plants. The other pathogens listed sometimes occur. If conditions at the planting site tend to favor the key diseases, the key plant should not be established there.
The user of this information assumes all risks for personal injury or property damage.
Prepared by Gary W. Moorman, Professor of Plant Pathology
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