Diagnostic summary

• What you see on plants

- in seedbeds, the most obvious symptom is the presence of water- soaked sunken lesions, in the stems of seed sprouts, near the soil line. The stem cortex decays causing stunting and yellowing.

- taproot and lateral small roots have black cankers that may lead to seedling death.

• More common in seedbeds.  Healthy plants in the field rarely develop symptoms.

• R. solani is extremely widespread,  but its effect on sweetpotato had only been recorded in the United States.

Taxonomy

Economic importance

Geographical distribution

Morphology

Symptoms

Biology and ecology

Host range

Management

References

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