Family Trichodoridae

                                             Rev 08/03/20

Classification:

Enoplea
Triplonchida

Trichodoridae Thorne, 1935

Small family with five genera recognized as of 2018:

Etymology - from the Greek trichos (a hair) and dory (a spear).

Almost exclusively terrestrial nematodes. Ectoparasitic nematodes feeding on the roots of both annual and perennial plants.

 Some species of Trichodorus Cobb, 1913 and Paratrichodorus Siddiqi, 1974 are vectors of plant-pathogenic tobraviruses (including
tobacco rattle virus, pepper ringspot virus and pea early-browning virus) and are important plant pests (Decraemer 1995).

Didelphic and monodelphic genera occur.  The didelphic genera (Trichodorus, Nanidorus and Paratrichodorus) are cosmopolitan with species reported worldwide. Currently, monodelphic genera (Allotrichodorus Rodriguez, Sher & Siddiqi, 1978, Ecuadorus Siddiqi, 2002 and Monotrichodorus Andrassy, 1976) are only known from Central and South America..

Classification and Characteristics Charts of the Orders Dorylaimida and Triplonchida

Morphology and Anatomy:

Distribution:

Trichodorus, Nanidorus and Paratrichodorus occur worldwide, Monotrichodorus, Ecuadorus 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 onchiostyle 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.

Holovachov, O., A Shoshin. 2014,  7.4 Order Triplonchida Cobb, 1919,  Handbook of Zoology. Gastrotricha …,

Return to Nemaplex Main Menu

Return to Trichodoridae Menu

Go to Nemaplex Main Menu