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Category: Gardening - Plant Doctor - Powdery Mildew
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Powdery
Mildew
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.
Source:
Crocus
- The leading online garden centre
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