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BLACK SPOT



Severe infection causes leaves to scar
Severe infection causes leaves to scar
Photo credit: Peter Magarey
Look For Look For Notes

   LOOK FOR

    Look for in shoots
  • Brown-black spots in sunken craters with grey centres and raised callused edges
  • Swollen and stunted shoots with black cankers

    Look for in leaves
  • Small chocolate-brown spots (1-3 mm diam.) on young leaves or shoots
  • Black spots on distorted or shot-holed leaves
  • Circular, grey-black patches (2-5 mm diam.) with reddish-purple margins on older leaves
  • Spots that may appear in lines along the veins

    Look for in bunches
  • Infected berries with round brown-black spots that enlarge to form 'bird's-eye spots' (2-7 mm diam.). Spots may coalesce

   CONDITIONS

  • Spreads in moist spring weather. Most frequent on Sultana and some tablegrape varieties

OTHER BLACK SPOT IMAGES

Black spot on Sultana leaves Shot-holed and crinkled leaves caused by black spot Small brown spots are early signs of black spot Bird’s-eye’ spots on young berries Hand lens view Early black spot on a young shoot Typical black spot on shoots Black spot cankers overwinter the disease Shoots severely distorted by black spot

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