FIGURE 1 Cole crops in the Columbia Basin of northcentral Oregon infected with beet leafhopper transmitted virescence agent (‘Candidatus Phytoplasma trifolii’) and Spiroplasma citri. A, Savoy cabbage field showing damaged areas highlighted by yellowed leaves. B, Savoy cabbage with yellowed leaves. C, Brussels sprout expressing phyllody. D, Savoy cabbage with phyllody symptoms. E, Red cabbage field with highly symptomatic plants in the foreground. F to H, Red cabbage plants with phyllody and chlorosis.
In 2021, both ‘Candidatus Phytoplasma trifolii’ and #Spiroplasma citri were detected in cole crops in Morrow County, Oregon. Hannah M. Rivedal et al. detail the molecular identification efforts for both pathogens: https://doi.org/10.1094/PHP-03-25-0101-BR