Pests and Diseases - Symptom Selector

Powdery mildew

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Powdery mildew

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Felco original secateurs (model no 2)

Symptoms

White powdery mould appears on the leaves, stems and buds. Young growth is particularly affected.

Cause

A fungal disease encouraged by the plant being dry at the roots with damp stagnant air around the top of the plant.

Harm

It looks unsightly and can cause leaves to drop early. If the plant is well established this is a relatively harmless disease. However, care should be taken with younger plants since these may be drastically weakened.

Treatment

Organic - remove all dead leaves in autumn to prevent the spores from over wintering. Mulch well in spring and autumn with well rotted farmyard manure to prevent the roots drying out. If possible, prune plants so they have an open shape and air can move through the branches.
Chemical - spray with a systemic fungicide at the first signs of attack. You can also use this spray prior to any signs of the disease, as a preventative measure.

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