Host Preference of Radopholus citrophilus from Hawaiian Anthurium among Selected Tropical Ornamentals

in HortScience
Authors: M.Y.C. Goo1 and B.S. Sipes1
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  • 1 Department of Plant Pathology, University of Hawaii at Manoa, Honolulu, HI 96822-2279

Fourteen tropical ornamental plants were evaluated for their host status to a population of Radopholus citrophilus isolated from anthurium. No nematodes were recovered from the roots of Aglaonema commutatum, Caryota mitis, Cycas revoluta, Dracaena deremensis, Neodypsis decaryii, Ravenea spp., or Spathiphyllum wallisii 5 months after inoculation, making these plants nonhosts. Low numbers of R. citrophilus were recovered from the roots of Phoenix roebellinii, Rhapis excelsa, and Howea forsteriana, suggesting that they were poor hosts to this nematode population. Anthurium trifidum, Chamaedorea neathebella, Chamaedorea seifrizii, and Calathea variegata were hosts for the nematode, allowing population increases of 2.47 to 29.92 times the inoculation density. C. seifrizii and C. variegata represent new hosts of R. citrophilus.

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