Potato Blight and Leaf-Roll Virus

  title={Potato Blight and Leaf-Roll Virus},
  author={Donald E. Richardson and D. A. DOLING},
OBSERVATIONS on the potato variety Ulster Supreme made at Cambridge in 1956 indicated that blight (Phytophthora infestans) was present on approximately twice as many tubers derived from plants infected with leaf-roll virus as on those from neighbouring virus-free plants (virus-free being used in this communication to mean free from visible symptoms of virus disease). The appearance of potato blight in August 1957 made possible an examination and comparison of the foliage of virus-free and leaf… CONTINUE READING

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