sooty mould


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Related to sooty mould: powdery mildew, sooty mold

sooty mould

n
1. (Plant Pathology) a fungal plant disease characterized by a blackish growth covering the surface of leaves, fruits, etc
2. (Plant Pathology) any of various fungi, such as species of Meliola or Capnodium, that cause this disease
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If there are plants underneath, they tend to get a sooty mould growing on the honeydew.
If there are plants underneath they tend to get a sooty mould growing on the honeydew.
These sap-sucking insect pests can weaken the growth of a wide range of plants especially when the honeydew turns into a black sooty mould.
2 (3) Cushion scale: Sucks the sap of evergreens, particularly camellia, holly, rhododendron and euonymus, and makes a sooty mould.
Keep greenfly under control on your roses, as they increase the risk of sooty mould and spread a virus that can be identified by yellow leaves and twisted growth.
Sooty mould may also develop on these secretions, blackening the leaves and reducing the rate of photosynthesis (Urquhart & Stone 1995).
If you don't get rid of them, they may pass on virus diseases as well as leaving a sticky layer on your plants, which becomes covered in sooty mould.
So often, plants are irreparably damaged before the gardener realises the problem and takes action, but signs include plants developing a puckered appearance, as black sooty mould which grows on the sticky honeydew secreted by the aphids starts to appear on leaves lower down the plant.
Joyce Higgins, by email CAROL: Sounds like sooty mould caused by honeydew or sap dripping down from leaves above, usually created by scale insects or aphids.
If you don't get rid of them, they may pass on virus diseases to your plants, as well as leaving a sticky layer of honeydew on your plants which becomes covered in sooty mould.
Infested plants become sticky with honeydew excreted by this insect, and further disfigurement occurs when sooty mould grows on this substance.