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Disease Note. Meloidogyne hapla on Clematis Cultivar Jackman in North Dakota. S. C. Redlin, Jr., Department of Plant Pathology, North Dakota State University, Fargo 58105. R. M. Hosford, Jr., Department of Plant Pathology, North Dakota State University, Fargo 58105. Plant Dis. 71:376. Accepted for publication 19 January 1987. Copyright 1987 The American Phytopathological Society. DOI: 10.1094/PD-71-0376B. Clematis spp. are ornamental woody vines of the Ranunculaceae
family. C. lanuginosa Lind x C. viticella L. 'Jackman' is a popular
ornamental in the northern Great Plains. Numerous galls (1 - 3 mm
diam.) were found on the roots of a S-yr-old or older Jackman vine in a
residential neighborhood of Ellendale in southeastern North Dakota.
Female nematodes from these galls were identified by perineal patterns
as Meloidogyne hapla Chitwood; identification was confirmed by K.
Hartman of North Carolina State University. This was the first report of
the northern root-knot nematode in North Dakota (1), which, unlike
most other root-knot nematodes, survives in cold climates. The
nematode damages many ornamental, vegetable, fruit, and field crops
and is a potential danger lo major North Dakota crops, such as potatoes
and sugar beets.
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