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- W124898515 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 appar- ently 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. Jhs is the first report of root- knot nematodes on Cercis The potential for synergism be- tween the nematodes and Verticillium wilt fungi is discussed. For approximately 18 years (1958-1976), the Shrub Breeding Project at the U.S. National Arbo- retum was involved with Cercis (redbuds), evalu- ating germplasm and attempting some interspe- cific hybridizations. This work was abandoned because of canker and wilt problems among the progenies and selections. Recently, spurred by the introduction and flowering of the Chinese C. racemosa Oliv., a tree-type species that produces its flowers in long racemes, work with this genus has begun again. Resistance to cankers caused by Botryosphaeria dothidea and to Verticillium wilt (caused by V. albo-atrum and V. dahliae) will be major goals of this research program. Screening for resistance or tolerance to Verti- cillium wilt by artificial inoculation with the patho- gen may not truly reflect the behavior of plants in field situations where other organisms are present. We have recently reported (9) that certain clones of Norway maple that showed high tolerance to Verticillium wilt inoculations could be killed back by the synergistic effects of V. dahliae and several species of root-knot nematodes (Meloidogyne spp.). In our compilation of the world literature con- cerning root-knot nematodes on landscape trees (10), no reports were found on Cercis spp. Therefore, we undertook to determine the re- sponse of various Cercis taxa to inoculation with several common root-knot nematodes as part of the overall selection and breeding program." @default.
- W124898515 created "2016-06-24" @default.
- W124898515 creator A5053644375 @default.
- W124898515 date "1995-01-01" @default.
- W124898515 modified "2023-09-27" @default.
- W124898515 title "SUSCEPTIBILITY OF REDBUDS (CERCIS)TO ROOT-KNOT NEMATODES" @default.
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