Submitted to: American Society of Agronomy Monograph Series
Publication Type: Monograph
Publication Acceptance Date: May 25, 2009
Publication Date: December 20, 2009
Citation: Timper, P. 2009. Chapter 10: Nematodes. In: Fribourg, H.A., Hannaway, D.B., West, C.P., editors. Tall Fescue for the Twenty-first Century, Agronomy Monograph, ASA-CSSA-SSSA, Madison, WI. 53:151-156. DOI:10.2134/agronmonogr53.c10. Technical Abstract: Nematodes may play a major role in limiting persistence and production of tall fescue (Lolium arundinaceum) 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 sp.), the stubby-root nematode (Paratrichodorus minor), the pin nematode (Paratylenchus sp.), and the lesion nematode (Pratylenchus scribneri)all have been shown to damage tall fescue in either greenhouse pots or field plots. The symbiotic endophyte of tall fescue, Neotyphodium coenophialum, 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.