Hirschmanniella
Contents
Rev 01/23/2004
Hirschmanniella |
Contents |
Rev 01/23/2004 |
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| Rice Root Nematode |
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Classification |
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Hosts |
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Morphology and Anatomy |
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Life Cycle |
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Economic Importance |
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Damage | |
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Distribution |
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Management |
| Return to Pratylenchidae Menu |
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Feeding |
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References |
Background Music:The Tragedy of Colusa County Lyrics: Howard Ferris Vocals: Howard Ferris Caveat: Despite the implication of these lyrics, there is absolutely no evidence that the rice root nematode occurs in Colusa County! The vocal rendition describes a fantasy series of events for educational purposes! |
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Formerly in the genus Radopholus.
Classified in the Pratylenchinae because of the long ventral overlap and lack of sexual dimorphism. Nematode is 0.9-4.2 mm long, is slender, amphidelphic. Deirids absent. Lip
area flattened anteriorly to hemispherical, not set-off. Lip sectors and labial
disc often fused.
Labial sclerotization strong. Esophageal glands in line, with a long ventral overlap of the intestine. Tail length three or more times anal body diameter, usually terminating in a point or mucro. Phasmids generally situated in posterior third of the tail. Female: Genital tract with two branches equally developed. |
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Male: Gubernaculum
not or only
slightly protruding. Caudal
alae not enveloping tail.
[Ref: Luc, (1987) and H. Ferris.] |
Lake bottom (reeds) Tulelake, reeds along ditches in Yolo County, paddy rice, Santa Ana River (southern California).
Rice, reeds, common cattail (Typha latifolia).
Sex ratio is about 1:1.
Ref: Luc, Rev. Nematol. 10(2):203-218 (1987)
H. Ferris.
Photomicrograph by John Chitambar, CDFA
