How to Prevent and Control Powdery Mildew on Apple Trees

An apple tree branch complete coated in a Podosphaera leucotricha fungal infection showing the characteristic white powder-like coating on the leaves.

Do you have a white powdery coating on the leaves of your apple trees? Are trying to figure out what it might be? It’s likely powdery mildew and it needs to be managed. This disease is found in every region of the world that grows apples and damages leaves, limbs, fruit, and may even make an apple harvest impossible. Read on to learn how to recognize this pernicious disease and how to treat it.