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| Damping-off |
| IPM scouting in herbaceous perennials > damping-off |
Pathogen: Multiple including Pythium spp. and Rhizoctonia spp.
Hosts: Very large host range.
Symptoms: Damping-off is a general term describing disease problems that occur while seeds are germinating or shortly thereafter, causing pre- and postemergence disease problems. Very young seedlings can be infected causing rapid seedling death.
Spread: Damping-off disease problems are generally caused by soil-borne pathogens. Avoid planting in infested soil or infested sites and reusing plug trays.
Management: Maintain good sanitation. Avoid overwatering and limit frequent, light waterings. Germinate seedlings at recommended temperatures to promote rapid germination and development of seedlings. See specific pathogens for more detailed information.
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| Damping-off of young Delphinium plants in a plug tray, caused by Rhizoctonia. |
A web of Pythium mycelium on the surface of a plug tray. Stems of these seedlings were infected at the soil line. |
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| This information was developed from A Pocket Guide for IPM Scouting in Herbaceous Perennials by Jan Byrne and Raymond A. Cloyd. Purchase this in a pocket-sized guide for reference in the orchard from MSU Extension (publication E-2981). |
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