Best Management Practices

Make sure all stock you receive from growers, trade, sales, landscapers, etc. is clean in order to exclude pests and pathogens.  Nursery stock which is already infected/infested can lead to unhealthy plants which cannot be sold and may contaminate other plants (61).  Importing stock that is rootless, leafless, and free of potting media reduces the chance of introducing pests and pathogens to the nursery (97).  An isolation area specifically for incoming plants could be created for this purpose.

Do not accept unsolicited plant material.  Check shipments to make sure you are receiving only the material which was ordered.  Plants which may have been accidentally included could harbor unexpected pests and pathogens (97).

PR:  The use of clean nursery stock is required in Phytophthora ramorum quarantine areas.  Isolate material suspected of infection for two months.  Isolate incoming stock and suspend use of fungicides for two months to determine if symptoms are being suppressed by previous treatments before mingling with other stock (72).