Rev 06/24/2015

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Tylenchus (Bastian, 1865) 

Aerotylenchus (Fotedar & Handoo, 1979) [Areotylenchus in Fortuner, 1984] 



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Morphology and Anatomy:

Key to the genera of the family Tylenchidae


Refer to subfamily diagnosis (Tylenchinae). 
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Commonly occurring in most soils. Feed on algae, mosses, lichens and plant roots. As an example: Soil nematodes were studied in three spruce forests in the Czech Republic from 1988 to 1991. A total of 74 species occurred, most belonged to the orders Tylenchida, Rhabditida and Dorylaimida. The most abundant nematodes were the mycophytophagous species of the family Tylenchidae followed by bacteriophages, especially by those in the order Rhabditida.

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Economic Importance:

Probably fairly small. Most reports are about occurrence and abundance rather than documenting any effects on growth. 

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Ectoparasites of plant roots, root hairs, algae, etc. 

 Yeates et al. (1993a) described Tylenchus as plant feeders (algal, lichen (algal or fungal component), or moss feeders that feed by piercing), or hyphal feeders.

Yeates et al. (1993b):  classified Tylenchus spp. as "plant associated", indicating that they were found in the rhizospheres of plants.

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For an extensive list of host plant species and their susceptibility to this genus, copy the genus name


select Nemabase Genus Search and paste the name in the Genus box


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Life Cycle:


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Relatively slight, small stylets penetrating only thin cell walls.

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Ferris, H., Venette, R.C., Lau, S.S. (1996), Dynamics of nematode communities in tomatoes grown in convential and organic farming systems, and their impact on soil fertility, Applied Soil Ecology, 3, 161-175

Geraert & Raski (1987)  Rev. Nematol. 10(2):143-161.

Gowen, S.R. (1970), Observations on the fecundity and longevity of Tylenchus emarginatus on sitka spruce seedlings at different temperatures, Nematologica, 13, 267-272

Hanel, Ladislav. 1996. Comparison of soil nematode communities in three spruce forests Boubin Mount, Czech Republic. Biologia (Bratislava) 51. 

Micoletzky, H. (1925), Die freilebenden Süsswasser- und Moornematoden Dänemarks nebst Anhang über Amöbesporidien und andere Parasiten bei freilebenen Nematoden, D. Kgl. Danske Vidensk. Selsk. Skrifter, Naurvidensk. og Mathem., ser 8, 10, 57-310

Sutherland, J.R. (1967), Parasitism of Tylenchus emarginatus on conifer seedling roots and some observations on the biology of the nematode, Nematologica, 13, 191-196

Thorne, G. (1961), Tylenchinae, chapter 5 in: Principles of Nematology, McGraw-Hill Book Company Inc., New York - Toronto - London, 553 pp.

Wood, F.H. (1971), Studies on the biology of soil-dwelling nematodes from tussock grassland, Ph.D. thesis, University of Canterbury, New Zealand, 286 pp.

Yeates, G.W., Bongers, T., Goede, R.G.M. de, Freckman, D.W., Georgieva, S.S. (1993a), Feeding habits in soil nematode families and genera - an outline for soil ecologists, Journal of Nematology, 25 (3): 315-331

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Copyright © 1999 by Howard Ferris.
Revised: June 24, 2015.