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  • Author or Editor: M. V. McKenry x
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The spatial distribution of nematodes in the soil of nine California vineyards was surveyed in summer and winter months. Soil samples were taken in the vine row and between rows at 15 cm depth intervals. There were no measurable seasonal changes in nematode distribution. Variation in the distribution of genera amongst vineyards was related to soil physical conditions and vineyard cultural practices. In general, highest concentrations of Meloidogyne spp. and Xiphinema spp. were in the upper 60 cm of soil in the vine row, whereas Tylenchulus semipenetrans was more deeply and uniformly distributed throughout the root zone.

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