Black spot or black scab (Venturia inaequalis) is a fungal disease of apples, and spreads quickly in warm wet weather. It usually first appears in spring on young leaves, as small spots about 3 millimetres across. If young fruit are infected they may become misshapen or develop deep cracks. Granny Smith apples are quite susceptible to the disease.
Te whakamahi i tēnei tūemi
New Zealand Institute for Plant and Food Research
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