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2023•Plant Health ProgressRequires access

First Report of the Root Lesion Nematode Pratylenchus penetrans Parasitizing Hemp (Cannabis sativa) in the United States

Lester A. Núñez-Rodríguez, Hannah M. Rivedal, Amy B. Peetz, Cynthia M. Ocamb, Inga A. Zasada

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Abstract

In 2022, during a survey of plant-parasitic nematodes affecting hemp in Washington and Oregon, a Pratylenchus sp. was found parasitizing hemp roots. Morphology and morphometrics, as well as molecular techniques, confirmed the identity of the nematodes extracted from hemp roots as Pratylenchus penetrans. A pathogenicity assay done in the greenhouse confirmed hemp as a host to P. penetrans, with an average reproduction factor of 2.2 at 60 days postinoculation. To our knowledge, this is the first report of P. penetrans on hemp in the United States.

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What this paper is about

In 2022, during a survey of plant-parasitic nematodes affecting hemp in Washington and Oregon, a Pratylenchus sp. was found parasitizing hemp roots. Morphology and morphometrics, as well as molecular techniques, confirmed the identity of the nematodes extracted from hemp roots as Pratylenchus penetrans. A pathogenicity assay done in the greenhouse confirmed hemp as a host to P. penetrans, with an average reproduction factor of 2.2 at 60 days postinoculation. To our knowledge, this is the first report of P. penetrans on hemp in the United States.

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OpenAlex reports 5 citations for this work. Citation counts describe recorded attention and do not establish research quality.

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Available abstract

In 2022, during a survey of plant-parasitic nematodes affecting hemp in Washington and Oregon, a Pratylenchus sp. was found parasitizing hemp roots. Morphology and morphometrics, as well as molecular techniques, confirmed the identity of the nematodes extracted from hemp roots as Pratylenchus penetrans. A pathogenicity assay done in the greenhouse confirmed hemp as a host to P. penetrans, with an average reproduction factor of 2.2 at 60 days postinoculation. To our knowledge, this is the first report of P. penetrans on hemp in the United States.

Key concepts: Pratylenchus penetrans, Biology, Pratylenchus, Nematode, Cannabis sativa, Nematology, Botany, Host (biology)

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First Report of the Root Lesion Nematode Pratylenchus penetrans Parasitizing Hemp (Cannabis sativa) in the United States — Research Paper | ScholarLens