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PHOMOPSIS



Bleached canes with Phomopsis should be removed where possible
Bleached canes with Phomopsis should be removed where possible
Photo credit: Bob Emmett
Look For Look For Notes

   LOOK FOR

    Look for in shoots
  • TYPE 1
  • Bleached internodes on dormant canes
  • Small black fruiting bodies (pycnidia) in the bleached areas
  • Sharp black lines outlining the bleached areas
  • TYPE 2
  • Bleached internodes on dormant canes
  • Elongated black cracks and scars on the lower 3-4 internodes of shoots
  • Stunted shoots

    Look for in leaves
  • TYPE 2
  • Small black spots (< 1 mm) with yellow halos on leaves

   CONDITIONS

  • Spreads during long periods of cool wet weather in spring
  • Monitor carefully in the period 3-6 weeks from budburst because actively growing foliage is most susceptible.

   NOTES

    Phomopsis can be confused with mite damage.

OTHER PHOMOPSIS IMAGES

Phomopsis leaf spots are usually on basal leaves Phomopsis leaf spots (right) differ from black spot (left) Phomopsis rot of berries is rare in most districts Young symptoms at the base of a shoot Old symptoms at the base of a shoot show typical black cracks Phomopsis cankers are shallower and more elongated than blackspot

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