When does apple scab occur?
Apple scab occurs when an apple tree falls victim to a fungus called Venturia Inaequalis, a malignant growth which slowly eats away the leaves and fruit.
It is a very widespread and serious disease affecting apple trees all over the world, but is more powerful in warm climates.
Farmers control the fungus by spraying the trees with sulphur. That is why apples or any fruit for that matter should be washed before eating.
