What is it?

A common fungal infection that attacks the leaves and fruit of apples and crabapples. Initially an aesthetic problem, the untreated fungus can weaken a tree over time.

How to Diagnose the Problem

Look for brown or olive green spots on young leaves and black and slightly raised on older leaves.  Severely infected leaves will turn yellow and fall to the ground.  Plants affected are apples, pears, crabapples and quince. Apple scab will show up March through July.

How to Control IT
  • Remove infected leaves that fall to the ground in summer and fall.
  • Plant resisant varieties
  • CHEMICAL FUNGICIDE: Spray with Fungonil or Systemic Fungicide in early spring when leaf buds open through flowering.
  • EARTH FRIENDLY: Treat with Copper Soap in early spring as soon as leaf buds start to open until blossoms drop.

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