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FIG.01 — Damping-off / seedling root rot, diseaseTap to enlarge
Plant part
Stem · Whole plant
P. persimilis
LOW IMPACT / SOIL APPLICATIO…
DiseaseProblem 08 / 32
Damping-off / seedling root rot
Symptoms
Seedlings collapse at the soil line; basal stem is thin, brown/black, soft, and water-soaked, especially in wet media.
How to verify
Compare the photos above with the plant, and check the symptom description against the look-alike records below before acting. The source guide does not carry a separate laboratory verification note for this record.
Next step
Use sterile media and clean trays, avoid overwatering, improve drainage, and provide airflow. Discard diseased seedlings. If labeled for the crop and pathogen, products containing mefenoxam or propamocarb may be used through irrigation; prevention is most important.
Active ingredients
hymexazolpropamocarb HCLmetam sodium
Organic active ingredients
Trichoderma spp.Bacillus subtiliscopper based products
P. persimilis: allowed / avoid
LOW IMPACT / SOIL APPLICATION
Label matters
Active ingredients below are examples, not universal prescriptions. Confirm the diagnosis; use only products registered for tomato and the target problem in your country; and follow the current label for dose, pre-harvest interval, worker protection, compatibility and re-entry. Rotate IRAC/FRAC modes of action. When symptoms are uncertain, obtain a laboratory or extension diagnosis. Integrated pest management (IPM)—sanitation, resistant varieties, irrigation management, monitoring and biological control—should be the first line of defense.
