Official Pest Reports

Official Pest Reports are provided by National Plant Protection Organizations within the NAPPO region. These Pest Reports are intended to comply with the International Plant Protection Convention's Standard on Pest Reporting, endorsed by the Interim Commission on Phytosanitary Measures in March 2002.

USA Flag Phytophthora ramorum (sudden oak death, ramorum blight, ramorum die-back); Expansion of Regulated Host Plants
Date posted: 06/23/2004
Contact: Not available
On February 14, 2002, APHIS published an interim rule in the Federal Register for Phytophthora ramorum (7 CFR 301.92). This rule restricts the movement of certain restricted and regulated articles to prevent the artificial spread interstate of this disease-causing organism from areas where the disease is established. We have now learned that certain plants require regulating in order to control the artificial spread of this disease. The purpose of this is to provide notification that APHIS is listing the genus Camellia as regulated host plants.

The below listed Camellias were found in nurseries during APHIS survey activities. All were confirmed positive by APHIS for P. ramorum by APHIS either by PCR (Polymerase Chain Reaction) and/or by morphological identification of a culture.

These seven species of Camellia:
Camellia hiemalis
Camellia kissi
Camellia lutchuensis
Camellia oleifera
Camellia saluenensis
Camellia sinensis
Camellia vernalis

These eighteen hybrids of Camellia:
Camellia japonica x Camellia lutchuensis
Camellia japonica x Camellia oleifera
Camellia japonica x Camellia sasanqua
Camellia lutchuensis x Camellia japonica
Camellia oleifera x Camellia hiemalis
Camellia oleifera x Camellia hiemalis x Camellia vernalis
Camellia pitardii var. pitardii x Camellia japonica
Camellia reticulata x Camellia japonica
Camellia reticulata x Camellia saluenensis x Camellia pitardii var. yunnanica
Camellia sasanqua x Camellia oleifera
Camellia sasanqua x Camellia hiemalis x Camellia oleifera
Camellia x japonica
Camellia x kissi
Camellia x lutchuenis
Camellia x oleifera
Camellia x reticulata
Camellia x saluenensis
Camellia x williamsii x C. oleifera

Including the three species and one hybrid already under regulation, PPQ has found 10 species and 19 hybrids of Camellia that P. ramorum infects. To ensure appropriate and effective inspection in quarantine areas and regulated nurseries and to mitigate the risk of spread of P. ramorum, we will now regulate Camellia at the genus level. This will be added to the “APHIS List of Host and Associated Plants” as a “host plant.”

Therefore, effective immediately, the following is a regulated article under 7 CFR 301.92 and PPQ orders restricting the movement of nursery stock to prevent the spread of P. ramorum:
Camellia spp. (Camellia, includes all species, hybrids and cultivars)


This action is authorized under the Plant Protection Act, as amended, Section 412(a), which authorizes the Secretary of Agriculture to prohibit or restrict the movement in interstate commerce of any plant, plant part, or article, if the Secretary determines the prohibition or restriction is necessary to prevent the dissemination of a plant pest within the United States.

This action is also authorized by 7 CFR 301.92-2(b)(2) which designates as restricted articles any other product or article that an inspector determines to present a risk of spreading P. ramorum. This designation requires the inspector to notify the person in possession of the product or article that it is a regulated article.

In accordance with the provisions of the Administrative Procedures Act, this action will be published as a regulatory update in the Federal Register for public comment.