RT Journal Article SR Electronic T1 Probability of Penetration and Infection by Root-Knot Nematode, Meloidogyne Arenaria, in Grape Cultivars JF American Journal of Enology and Viticulture JO Am J Enol Vitic. FD American Society for Enology and Viticulture SP 31 OP 35 DO 10.5344/ajev.1982.33.1.31 VO 33 IS 1 A1 H. Ferris A1 S. M. Schneider A1 M. C. Stuth YR 1982 UL http://www.ajevonline.org/content/33/1/31.abstract AB Phenology of the root-knot nematode Meloidogyne arenaria is influenced by host cultivar-specific penetration and infection processes which reflect host status. The relationships between number of nematodes penetrating or establishing infection sites in roots and physiological time (DD10) was described by logistic functions for eleven grape cultivars. In three root-knot nematoderesistant rootstocks, a few larvae penetrated during the first 50 DD10 and then apparently left the root. Cultivars could be grouped according to their susceptibility to penetration and infection. Susceptible cultivars were Carignane, Barbera, French Colombard, Ruby Cabernet, Cabernet Sauvignon, Zinfandel, and the rootstocks AXR1 and St. George; moderately resistant were Tokay, Thompson Seedless and Perlette; and highly resistant or immune were Dog Ridge, Salt Creek and Harmony.