Symptoms. Damping-off often is seen in round patches in seeding flats. Preemergence damping-off is a term used to describe the rot of seeds, or the death of the seedlings, before they emerge from the soil. Post-emergence damping-off affects seedlings that have already emerged from the soil. These seedlings may develop a dark stem rot near the soil surface which will cause them to fall over and die as the rotted area shrivels.
Left: Damping off in a tray of seedlings.
Prevention. The best way to control this disease is to prevent it. There are many prevention techniques, and a combination of them is most effective.
Baker, R. 1985. Damping-Off in Diseases of Floral Crops, Volume 1. Chapter 1 Praeger, New York. D.L. Strider, ed.
Chase, A.R. 1995. Compendium of Ornamental Foliage Plant Diseases. APS Press, St. Paul, MN.
Daughtery, M.L., R.L. Wick, and J.L. Peterson. 1995. Compendium of Flowering Potted Plant Diseases. APS Press, St. Paul, MN.
Jones, R.K. and D.L. Strider. 1985. Bedding Plants in Diseases of Floral Crops, Volume 1. Chapter 1. Praeger, New York. D.L. Strider, ed.
This information was developed for conditions in the Northeast. Use in other geographical areas may be inappropriate.
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