Ten species have been added to the list of federally regulated P. ramorum associated host plants. The USDA Animal and Plant Health Inspection Service (APHIS) issued the on 2/22/10, adding Mexican-orange (Choisya ternate), kousa dogwood (Cornus kousa), Daphniphyllum glaucescens, European holly (Ilex aquifolium), Japanese-oak (Lithocarpus glaber), Magnolia cavalieri, Magnolia foveolata, bayleaf currant (Ribes laurifolium), bilberry (Vaccinium myrtillus), and lingon berry (Vaccinium vitis-idaea) to the list. Symptoms for each of the new hosts other than bilberry were leaf necrosis. Tip dieback occurs in infected bilberry as well as Daphniphyllum glaucescens These species were identified as susceptible by the Canadian Food Inspection Agency (CFIA) and the United Kingdom's Food and Environment Research Agency (FERA).
Nurseries currently operating under an APHIS P. ramorum compliance agreement are able to continue shipping hosts and associated plants, including the newly listed plants; however, any nurseries not currently under a compliance agreement that contain these new species must be properly inspected, sampled, tested, and placed under a Compliance Agreement by 3/31/10 in order to be able to move any plants interstate.
From the COMTF March newsletter
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