Regarded as a synonym of
Races or biotypes of R. similis have long been recognized, and, in 1984, the citrus
and banana races were described as sibling species
with different chromosome
numbers (Huettel, Dickson and Kaplan, 1984. Proc. Helm. Soc. Wash. 51:
was considered the original banana race,
a parasite of banana but not citrus.
and R. citrophilus was
designated the citrus burrowing nematode, a parasite
of both citrus and banana.
Chromosome numbers of the sibling species
were reported to differ: R. similis - n=4, R. citrophilus - n=5.
There is also evidence of reproductive isolation in mating tests.
The designation of the two species caused considerable consternation among regulatory nematologists in Florida who
argued that not enough populations have been studied,
and that routine separation was very difficult.
Radopholus citrophilus is currently
considered a synonym of R. similis.
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Reported median body size for this species (Length mm; width micrometers; weight micrograms) - Click:
Migratory endoparasite in all life
Host Plant Resistance, Non-hosts
Potential for spread in California
Duncan, L.W. and E. Cohn. 1990. "Nematode parasites of citrus." Pp.
321-346, M. Luc et al. (eds.), Plant-parasitic Nematodes in Subtropical and
Tropical Agriculture. Wallingford, England: CAB International.
Kaplan, D. T., M. C. Vanderspool, C. Garrett, S. Chang and C. H. Opperman.
1996. "Molecular polymorphisms associated with host range in the highly
conserved genomes of burrowing nematodes, Radopholus spp." Molecular
Plant-Microbe Interactions. 9:32-38.
Kaplan, D.T. and J.H. O’Bannon. 1985. "Occurrence of biotypes in
Radopholus citrophlus." Journal of Nematology. 17:158-162.
Huettel, Dickson and Kaplan, 1984. Proc. Helm. Soc. Wash. 51: 32-35.
Kaplan (Journal of Nematology, 1984, 1985)