California Department of Food and Agriculture (CDFA) nursery inspectors are now conducting two Phytophthora ramorum inspections per year on medium-risk plants and three inspections per year on high-risk plants.
Camellia spp. and Rhododendron spp. have been defined as high risk because these genera have a higher frequency of P. ramorum infection compared to other genera. Medium-risk plants include Viburnum,Pieris and Kalmia. With an ever-expanding host list and decreasing resources, inspections are increasingly focused on those plants at greatest risk for P. ramorum.
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For more: CDFA, (916) 654-0317; www.cdfa.ca.gov/phpps.