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ARS Home » Pacific West Area » Corvallis, Oregon » Horticultural Crops Disease and Pest Management Research Unit » Research » Publications at this Location » Publication #407731
Research Project: Disease Management in Small Fruit and Nursery Crops Based on Knowledge of Pathogen Diversity, Biology, and Environmental Effects

Location: Horticultural Crops Disease and Pest Management Research Unit

Title: First report of Meloidogyne hapla on hemp (Cannabis sativa) in Oregon

Author
item NUNEZ-RODRIGUEZ, L - Oregon State University
item Rivedal, Hannah
item Peetz, Amy
item OCAMB, C - Oregon State University
item Zasada, Inga

Submitted to: Journal of Nematology
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 12/13/2023
Publication Date: 3/1/2024
Citation: Nunez-Rodriguez, L., Rivedal, H.M., Peetz, A.B., Ocamb, C.M., Zasada, I.A. 2024. First report of Meloidogyne hapla on hemp (Cannabis sativa) in Oregon. Journal of Nematology. 56(1). https://doi.org/10.2478/jofnem-2024-0008.
DOI: https://doi.org/10.2478/jofnem-2024-0008

Interpretive Summary: In 2022, as part of a broader survey of plant pathogens associated with hemp (Cannabis sativa) in Oregon and Washington, the root-knot nematode Meloidogyne hapla was found associated with hemp roots. To our knowledge, this is the first report of M. hapla on hemp in Oregon, USA.

Technical Abstract: Hemp is a crop that has gained interest in Washington and Oregon. As with other crops, hemp production faces challenges due to biotic factors, including plant-parasitic nematodes. During a survey for plant-parasitic nematodes associated with hemp, Meloidogyne sp. was found in a composite root sample collected in Oregon. Morphological characterization of second-stage juveniles identified the nematode as Meloidogyne hapla. Molecular identification confirmed the population as M. hapla. Under greenhouse conditions, hemp was a poor host for M. hapla (RF < 1). To our knowledge, this is the first report of M. hapla on hemp in the Pacific Northwest of the United States.