GRAPEVINE RED BLOTCH DISEASE


red. Occasionally, the reddening of leaf blade in the interveinal zones between secondary veins resembles those of leafroll diseases, but the leaf margins do not roll downward. Also, in leaf-roll affected red varieties the secondary and tertiary veins remain green. It is not known if the disease has any effect on fruit yield, and cause vine ...

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  • File name: 157139.pdf
  • Source: ucanr.edu

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