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Symptoms
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Black coatings on leaves, needles, shoots, twigs, branches and the stem of numerous plant species; sometimes producing large crusts.
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Impact
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Sooty moulds are various species of microscopic fungi, which are specialised in deteoration of sugar-containing feces of aphids on plant organs. Sooty moulds usually do not damage the parts which they cover. Only very thick and large sized layers may lead to losses in increment in some species. The plant surface is colonised by air-borne spores, which, in contact to the sugar containing feces are able to propagate very quickly. There is a possibility of mistaking sooty moulds with coatings of soot or tarry covers.
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Control
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Hardly necessary; to reduce the optical impairment, the coatings can be washed off.
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| Hosts |
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Maple;
All tree species;
Apple;
Birch;
Pear;
Beech;
Boxelder;
Douglas fir;
European mountain ash;
Edible chestnut;
English ivy;
Yew;
Oak;
Wild service tree;
Alder;
Ash;
Ex-Robinia;
Serviceberry;
Spruce;
Lilac;
Forsythia ;
Framire;
Ginkgo;
Tree-of-heaven;
European Hornbeam;
Dogwood;
Hazel;
Hemlock;
Elder;
Hophornbeam;
Pine;
Cherry;
Buckthorn;
Larch;
Thuja;
Privet;
Linden, Lime;
Magnolia;
Redwood;
Giant sequoia;
Mulberry;
Common whitebeam;
Common medlar;
Cotoneaster;
Olive tree;
Poplar;
Bladdernut;
Plane;
Rhododendron;
Leyland cypress;
Rose;
Horse chestnut;
False Cypress;
Japanese Pagoda tree;
Spindle;
Holly;
Fir;
Southern Catalpa;
Elm;
Juniper;
Walnut;
Willow;
Common grape wine;
Hawthorne;
Cedar;
Hackberry;
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| Affected plant parts
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Leaf;
Needle;
Shoot/Twig/Branch;
Stem;
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