Damping-Off Diseases [book]

Franklin Laemmlen
2002 unpublished
Damping-off diseases of seedlings are found worldwide and can be caused by several species of fungi under various weather conditions. The name damping-off is in standard use in the literature and usually refers to the disintegration of stem and root tissues at and below the soil line. The plant tissues become water-soaked and mushy, and the seedling wilts and falls over. Damping-off diseases, however, can have several phases. The fungi that cause these diseases can attack the seed or the
more » ... seed or the seedling before it emerges above the soil surface, causing a seed rot or pre-emergent rot. When this happens, the result is a poor stand that may be mistakenly ascribed to poor seed quality or seed maggots rather than to the presence of a disease. The death of seedlings after emergence or transplanting is called postemergent damping-off and is the condition most often identified as damping-off (although this symptom may also be caused by maggots). Most pathogens that cause damping-off diseases can also cause disease as the plant grows to maturity. Root rot, crown rot, stem lesions, basal rot, crater rot, bottom rot, and stem girdling diseases may all be associated with damping-off fungi attacking mature plants.
doi:10.3733/ucanr.8041 fatcat:dsu4vl2ihbgn7e7byhvoiyspcm