Interactions of Selected<i>Vitis</i>Cultivars with Endoparasitic Nematodes

Abstract

The effects of five <i>Meloidogyne</i> spp. and one <i>Pratylenchus</i> and one <i>Tylenchulus</i> on growth of 18 <i>Vitis</i> cultivars were studied in microplots. Nematode population growth was assessed on each cultivar. <i>Vitis vinifera</i> cv. Thompson Seedless was used as a standard to compare host status of other grape cultivars. Resistant and susceptible responses were based on nematode reproduction and vine response. Grape cultivars 1613C, Dog Ridge, Freedom, Harmony, Teleki 5C, K51-32, and Ramsey were graded as susceptible to <i>M. arenaria</i> pt. Harmony and resistant to all other <i>Meloidogyne</i> spp. K51-32 and Ramsey were rated as resistant and Dog Ridge as moderately resistant against <i>P. vulnus</i> and <i>T. semipenetrans. Meloidogyne arenaria</i> pt. Harmony has the potential to be a major pest of grape rootstocks.