These diseases can disfigure the leaves and the fruit, reduce the yield, and weaken or kill the tree over time. The best way to combat them is to choose an apple variety that has been bred to ...

According to the Royal Horticultural Society: "Apple canker is a disease caused by a fungus, Neonectria ditissima, which attacks the bark of apples and some other trees, causing a sunken area of ...

According to the Royal Horticultural Society: "Apple canker is a disease caused by a fungus, Neonectria ditissima, which attacks the bark of apples and some other trees, causing a sunken area of ...