engleski

Xiphinema ssp. extension in different soil types of Istrian vineyards

Viticulture in istra, Croatia has a long tradition and great economical importance. Istra County had 6 420 hectares of vineyards in 2000, that was 11, 6 % total acreage of croatian vineyards. The problem of nematodes was increasing steadily, therefore a research on Xiphinema spp. was put in three wine growing areas (West, Central, east Istria) on different anthropological soil types - aric anthrosols. In West Istria wine growing areas aric anthrosols were middle deep or deep and loess red soils with slight inclination. Central areas had aric anthrosols on flysch, with higher inclination and terraced terrains. Central and East wine growing areas had in certain areas mixed soil types (red and flysch soil). All aric anthrosols had similar mechanical structure (over 30 percent clay), soil profile s changed by deep ploughing, and stable chemical structure (some locations had increased potassium share). Aric anthrosols on flysch had more carbonates. During biannual research (1999, 2000) samples from 25 locations in 3 wine growing areas were collected and analysed. The larvae and adult females of genus Xiphinema were detected on 12 locations what implies that 48 percent researched vineyards were contamined (44 % red and 4 % flysch aric anthrosols). Results showed high contamination on red aric anthrosols, which are the most important for Istra s viticulture (west area). Therefore a systematic research should be continued resulting with a map of nematodes Xiphinema extension.

Xiphinema spp.; soil; Istra; vineyards

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