Hirschmanniella
Contents
Rev 11/02/2005
Hirschmanniella |
Contents |
Rev 11/02/2005 |
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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 |
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| Formerly placed 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. |
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Esophageal glands in line, with a long ventral overlap of the intestine.
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Male: Gubernaculum
small,
not or only
slightly protruding. Caudal
alae not enveloping tail.
[Ref: Luc, (1987) and H. Ferris] |
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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.
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Female: Genital tract with two branches equally
developed. Note spermathecae with sperm near edge of field of view.
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Generally, the species of this genus are associated with grassy plants growing in wet or aquatic conditions, e.g., rice, reeds, sedges.Lake bottom (reeds). Locally the genus is reported from several locations, including reeds near Tulelake, reeds along ditches in Yolo County, paddy rice, Santa Ana River (southern California).
Rice, reeds, common cattail (Typha latifolia).
Sexually reproducing, sex ratio is about 1:1.
Ref: Luc, Rev. Nematol. 10(2):203-218 (1987)
H. Ferris.
Photomicrographs by H. Ferris and John Chitambar, CDFA
