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(A) Symptoms of GFLV on whole plants, (B) on leaves and bunches of grapes. (C) GFLV particles purified from grapevines, and (D) nematodes in the soil. (E) Measurement of the infective potential of soil of the donor vineyard: presence of nematodes (Xiphinema index in blue, Xiphinema diversicaudatum in red) in the affected plot. (F) Sampling soil containing nematodes and transport to the trial site.
