Industrial hemp grown in Oregon and Washington is primarily produced for cannabidiol extraction and smokable flower. High quality plant biomass and floral parts are necessary for growers to produce a profitable crop. Field surveys of the plants have indicated the presence of Spiroplasma citri, 'Candidatus Phytoplasma trifolii', and beet curly top virus in Oregon and Washington grown hemp, all pathogens transmitted by the Beet leafhopper. Beet leafhopper (Circulifer tenellus)-transmitted pathogens threaten the yield and quality of hemp grown in this region and could provide inoculum for other susceptible cropping systems. Accurate detection and management are paramount to successfully incorporate hemp as a rotation crop in the Pacific Northwest.
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