Nematodes may play a major role in limiting persistence and production of tall fescue [Lolium arundinaceum (Schreb.) Darbysh.] in the southeastern United States. These parasites tend to cause greater plant damage in sandy soils than in soils of heavier texture because light-textured soils are conducive to nematode activity and to drought stress. The lance nematode (Hoplolaimus spp.), the stubby-root nematode [Paratrichodorus minor (Colbran)], the pin nematode (Paratylenchus spp.), and the lesion nematode [Pratylenchus scribneri (Steiner)] all have been shown to damage tall fescue in either greenhouse pots or field plots. The symbiotic endophyte of tall fescue, Neotyphodium coenophialum (Morgan-Jones and Gams) Glenn, Bacon, and Hanlin, confers resistance to some but not to all plant-parasitic nematodes. The mechanism by which the endophyte confers resistance to nematodes in tall fescue is not known. The endophyte is not present in the roots; therefore, the fungus either induces physiological changes in the plant or produces toxins and repellents that are translocated to the roots.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
Copyright © 2009. American Society of Agronomy, Crop Science Society of America, Soil Science Society of America, 5585 Guilford Road, Madison, WI 53711-5801, USA. Tall Fescue for the Twenty-first Century. H.A. Fribourg, D.B. Hannaway, and C.P. West (ed.)