How can I control Apple Powdery Mildew?
Posted by Suttons Staff on 09 August 2013 12:59 pm
Apple Powdery Mildew is a common disease of apple trees although the fungus will also attack Quince and less frequently Pears and Medlar.

A white powdery coating develops on the leaves, shoots and flowers very soon after bud burst in spring. The spores overwinter in the buds or on shoots as silvery white patches on the bark. The wind borne spores spread quickly in hot dry summers. Young leaves that are attacked are distorted, may not reach full size and drop prematurely.

Keep the trees well watered in dry spells as dry soil conditions aid the development of Powdery Mildew. Mulch around the root area in early spring to aid moisture retention in the soil. In winter prune out badly infected growth. 

Prune the trees to keep the centre open to improve air circulation. Spray the tree with Bayer's Systhane Fungus Fighter following the manufacturer's recommendations.
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