Category Archives: C-Rated

“C”
A pest of known economic or environmental detriment and, if present in California, it is usually widespread. C-rated organisms are eligible to enter the state as long as the commodities with which they are associated conform to pest cleanliness standards when found in nursery stock shipments. If found in the state, they are subject to regulations designed to retard spread or to suppress at the discretion of the individual county agricultural commissioner. There is no state enforced action other than providing for pest cleanliness.

Xanthomonas hortorum pv. vitians (Brown) Morinière et al. 2020 Bacterial spot of lettuce

California Pest Rating Proposal for

Xanthomonas hortorum pv. vitians (Brown) Morinière et al. 2020
Bacterial spot of lettuce
Current Pest Rating: None
Proposed Pest Rating: C


Comment Period: 05/27/2026 through 07/11/2026


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Posted by SK

Trichoferus campestris (Faldermann): velvet longhorn beetle

California Pest Rating Proposal for

Trichoferus campestris (Faldermann): velvet longhorn beetle
Current Pest Rating: B
Proposed Pest Rating: C


Comment Period: 05/27/2026 through 07/11/2026


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Posted by SK

Podosphaera pannosa (Wallroth) de Bary Rose powdery mildew

California Pest Rating Proposal for

Podosphaera pannosa (Wallroth) de Bary
Rose powdery mildew
Current Pest Rating: Z
Proposed Pest Rating: C


Comment Period: 04/16/2026 through 05/31/2026


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Posted by SK

Arocatus melanocephalus (Fabricius): elm seed bug

California Pest Rating Proposal for

Arocatus melanocephalus (Fabricius): elm seed bug
Current Pest Rating: Q
Proposed Pest Rating: C


Comment Period: 04/15/2026 through 05/30/2026


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Posted by SK

Candidatus Phytoplasma trifolii Hiruki & Wang 2004 clover proliferation phytoplasma

California Pest Rating Profile for

Candidatus Phytoplasma trifolii Hiruki & Wang 2004 clover proliferation phytoplasma

 Pest Rating: C


Comment Period: 02/19/2026 through 04/05/2026


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Posted by SK

Fusarium asiaticum O’Donnell, Aoki, Kistler & Geiser 2004

California Pest Rating Profile for

Fusarium asiaticum O’Donnell, Aoki, Kistler & Geiser 2004
Pest Rating: C


Comment Period: 02/06/2026 – 03/23/2026


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Posted by SK

Gymnotelium blasdaleanum (Dietel & Holway) Arthur 1934 Pacific Coast pear rust

California Pest Rating Profile for

Gymnotelium blasdaleanum (Dietel & Holway) Arthur 1934
Pacific Coast pear rust
Pest Rating: C


Comment Period: 10/17/2025 – 12/01/2025


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Posted by SK