OCCURRENCE OF XIPHINEMA INDEX IN LEBANESE VINEYARDS

J. Jawhar, N. Vovlas, M. Digiaro

Abstract


Soil samples were collected in late spring 2005 from vineyards in 25 different locations of the Bekaa valley, the main grapevine-growing area of Lebanon, to investigate the presence of the longidorid nematode Xiphinema index Thorne & Allen, the vector of Grapevine fanleaf virus (GFLV). Approximately 14% of the samples contained the nematode, which was found in all developmental stages except for males, which are very rare in this species. The density of the nematode population ranged from 8 to 45 specimens/500 ml of soil. The main morphological characteristics of taxonomic relevance in the Lebanese population of X. index are described, while selected morphometric parameters from a population of 18 specimens were compared with those reported in the literature. This is the first survey for the presence and distribution of X. index in Lebanon.

Keywords


Xiphinema index; nematode virus vector; Grapevine fanleaf virus

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DOI: http://dx.doi.org/10.4454/jpp.v88i1.840

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EDIZIONI ETS, Pisa, Italy