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Glomerella cingulata - anthracnose
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Symptoms / species
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Impact / measures
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Pictures
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Occurrence map
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 | | Leaves: local spots, mostly dark, fruiting bodies of fungi;
twigs, branches: limited, sunken bark necroses, scab-like, blackish, also with fungal fruiting bodies; seedlings: sunken necrosis on the stem, blackish, with fruiting bodies, above wilt. The fruiting bodies mostly belong to the asexual stage Colletotrichum gloeosporioides and typically show bristles (hand lens!).
| | | Affected tree species | Apple; Birch; Cherry; Linden, Lime; Poplar; Privet; Willow; | | Affected parts | Leaf; Stem; Shoot/Twig/Branch; |
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| Though numerous plant species can be infected by Glomerella cingulata, symptoms are most common on willows (scabby bark surface of fine twigs and dying of the parts above). Often also seedlings are killed (privet): predisposition often heat damage!
Curative measures
Damage hardly endangering older plants; for protection of seedlings fungicides can be applied (see Official Register of Plant Protection), always in combination with hygienic measures. If privet shows dieback and scab, predispositions should be checked (wounds, nutrient deficiencies). In rainy years and on moist sites infestation without previous disposition
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| Glomerella cingulata, seedlings of privet: damage to the day/night zone | | Glomerella cingulata, seedlings of privet: damage to the day/night zone | | Glomerella cingulata, seedlings of privet: bark necrosis higher up on the stem, without fungal fruiting bodies | | Glomerella cingulata, seedlings of privet: spore cushions of the asexual stage Colletotrichum gloeosporioides in the necrosis | | Glomerella cingulata, seedlings of privet: spore cushions of the asexual stage Colletotrichum gloeosporioides, with bristles | | Glomerella cingulata: spores of the asexual stage Colletotrichum gloeosporioides |
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