Observations On Longidorus Euonymus N.Sp. and Xiphinema v uIttenezi Luc Et Al., 1964 (Nematoda: Dorylaimida) Associated With Spindle Trees Infected With Euonymus Mosaic Virus in Czechoslovakia

Abstract

A needle nematode, Longidorus euonymus n.sp. is described; it was frequently found with a dagger nematode Xiphinema vuittenezi Luc et al., 1964 in the rhizosphere of Spindle trees (Eunoymus europaeus L.) that were often infected with euonymus mosaic virus (EMV) in different localities of the Bratislava district. L. euonymus n. sp. is most similar to L. closelongatus Stoyanov, 1964 and L. cohni Heyns, 1969 but has a much shorter odontostyle than either of these and a relatively fatter body than L. cohni; it also resembles L. vineacola Sturhan & Weischer, 1964 but has a more offset lip region, shorter odontostyle and relatively longer female tail; it is generally larger than L. attenuatus Hooper, 1961 and L. elongatus (de Man, 1876) with a more offset lip region than L. elongatus and a wider and more bluntly rounded female tail than either of these species. Details are also given of juvenile stages. In transmission trials, juveniles and females of L. euonymus acquired EMV from mechanically inoculated cucumber-plants and transmitted it to healthy cucumber-plants but juveniles and females of X. vuittenezi failed to do so under the same conditions. L. euonymus was not necessarily responsible for the incidence of EMV on Spindle trees because the fungus Olpidium brassicae, that also transmits this virus, was present at most sites.