Submitted to: International Neotyphodium Grass Interactions
Publication Type: Proceedings
Publication Acceptance Date: 4/1/2004
Publication Date: 5/23/2004
Citation: Timper, P., Bouton, J. 2004. Effect of endophyte status and tall fescue cultivar on reproduction of lesion and stubby-root nematodes. In: Kallenbach, R., Rosenkrans, C., Lock, T.R., editors. Proceedings of the 5th International Symposium on Neotyphodium/Grass Interactions, May 22-27, 2004, Fayetteville, Arkansas. Paper No. 406. Interpretive Summary:
Technical Abstract: Plant-parasitic nematodes may contribute to poor growth and persistence of tall fescue on sandy soils in the southeastern United States (Elkins et al., 1979). The presence of the endophyte Neotyphodium coenophialum confers resistance to some of these nematodes, notably the lesion nematode Pratylenchus scribneri and the root-knot nematode Meloidogyne marylandi (Kimmons et al., 1990). Recently, new strains of N. coenophialum have been isolated from wild tall fescue and artificially inoculated into elite tall fescue cultivars. These strains, hereafter referred to as nontoxic, were selected because they produce low to nil levels of ergot alkaloids. Endophyte strains can differ in their ability to confer resistance to nematodes (Eerens et al., 1997); therefore, our objective was to determine whether two nontoxic strains confer resistance to lesion nematodes in Jesup and Georgia 5 tall fescue cultivars. A post hoc objective was to determine whether endophyte status or tall fescue cultivar affected numbers of the stubby-root nematode Paratrichodorus minor.