Trichodoridae

Family Trichodoridae

                                             Rev 05/05/08

Classification:

Adenophorea
Triplonchida
Trichodoridae

Small family with four genera recognized as of 1996:

Trichodorus Cobb, 1913
Paratrichodorus Siddiqi, 1974
Monotrichodorus Andrássy, 1976
Allotrichodorus Rodriguez, Sher and Siddiqi, 1978

Classification and Characteristics Charts of the Orders Dorylaimida and Triplonchida

Sub-orders
Superfamilies
Families
Genera

Morphology and Anatomy:

Trichodorus and Paratrichodorus diovarial, Monotrichodorus and Allotrichodorus monovarial.
Caudal alae usually absent in males of Trichodorus, but occur in Paratrichodorus and Allotrichodorus.
Males of all genera with a single testis.
Vary in length from 0.4 to 1.8 mm. Usually rounded at both ends.
Cuticle tends to swell in water and fixative when nematodes killed.
Curved odontostyle with dorsal groove.

Distribution:

Trichodorus and Paratrichodorus occur worldwide, Monotrichodorus and Allotrichodorus only reported from South and Central America as of 1996.

Economic Importance:

Wide host range, stunt roots, transmit Tobacco rattle Virus, Pea early-browning Virus and Pepper Ringspot Virus.

Feeding:

At root tip.

Stubby root nematodes are characterized by a curved odontostyle which is not hollow. Ingested cell contents are channeled along a groove on the dorsal, outer, surface of the curve. A polysaccharide feeding tube forms around the spear as it penetrates the cell wall; the feeding tube may aid in channeling cell contents along the spear.

Hosts:

Wide host range.

Life Cycle:

Damage:

Root elongation ceases.

The common name of these nematode genera, stubby root nematodes, reflects the root tip feeding habit, which in many plants, results in termination of root elongation. Like nematodes in the Dorylaimida, stubby root nematodes are directly damage plants through their feeding, but are also capable of transmitting plant viruses.

Management:

Sources:

Decraemer, 1995.

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