American Journal of Potato Research

, Volume 83, Issue 4, pp 343–347 | Cite as

The host range ofSpongospora subterranea f. sp.subterranea in the United States

  • Xinshun Qu
  • Barbara J. Christ
Short Communication


This study was performed to determine the host range ofSpongospora subterranea f. sp.subterranea on common crops and weeds in the northeastern United States. Seedlings of the plants were grown in nutrient solutions and inoculated with spore balls ofS. subterranea. The roots were microscopically examined for the presence of plasmodia or zoosporangia 14 days after inoculation. The plants were then transferred to a greenhouse and grown in a soilless mix. The roots were examined for the presence of symptoms and spore balls after 4 months. Of 26 species within 10 families from monocotyledons and dicotyledons tested, 16 species were found to be susceptible toS. subterranea. Twelve species were newly recorded hosts forS. subterranea. Gall symptoms were observed on the roots of six species and spore balls were found on three species. Evidence is presented for the first time that galls and spore balls ofS. subterranea might form on non-Solanaceous species. This investigation is important for the cultural management of potato powdery scab disease because there currently are no effective controls.

Additional Key Words

Solanum tuberosum 


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Copyright information

© Springer 2006

Authors and Affiliations

  1. 1.Department of Plant PathologyThe Pennsylvania State UniversityUniversity ParkUSA

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