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Arboriculture & Urban Forestry Online
Volume 21, Issue 1 — January 1995

Susceptibility of Redbuds (Cercis) to Root-Knot Nematodes    (View PDF)

Frank S. Santamour, Jr. and Louise G.H. Riedel

Abstract: The native eastern American redbud {Cercis canadensis) was susceptible to parasitization by the northern root-knot nematode (Meloidogyne hapla), which produced galls and viable egg masses on this host. Two Chinese redbud species, C. chinensis and C. yunnanensis, were similar to C. canadensis in being susceptible to M. hapla and also apparently resistant to the reproduction of the other nematodes. Th ree other species (C. occidentalisimm western United States, C. racemosairom China, and C. siliquastrumimm Europe) were also susceptible to M. hapla as well as to M. arenaria (two races), M. incognita, and M.javanica. Jh\s is the first report of rootknot nematodes on Cercis The potential for synergism between the nematodes and Verticillium wilt fungi is discussed.


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