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High Recovery Rate of Phytophthora from Containerized Nursery Stock Pots at a Retail Nursery Highlights Potential For Spreading Exotic Oomycetes

N. L. Dart and G. A. Chastagner

August 2007


Containerized nursery stock asymptomatic for Phytophthora leaf, stem and root diseases were sampled from a nursery in western Washington state directly over areas soil tested positive for Phytophthora ramorum during nursery surveys conducted. Phytophthora was recovered from the soil collected below 90% of the containerized plant pots. The study underscores the potential for exotic and endemic Oomycetes to be transported on asymptomatic nursery stock.


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