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