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These fungal diseases of camellias cause brown leaf blotches, premature leaf loss and twig or branch dieback. They are most damaging on young plants or newly propagated material.
Camellia leaf blight
Camellia leaf blight is a fungal disease caused by one of two fungal pathogens: Monochaetia karstenii and Pestalotiopsis species. The development of the disease is favoured by wetness on the leaves and any factors that weaken or damage the foliage.
You may see the following symptoms:
There are no fungicides available to amateur gardeners with specific recommendations for use against camellia leaf blight. However, the fungicides tebuconazole (Provanto Fungus Fighter Concentrate) and tebuconazole with trifloxystrobin (Provanto Fungus Fighter Plus, Toprose Fungus Control & Protect) are labelled for the control of leaf spots on ornamentals, whilst triticonazole (Scotts Fungus Clear Ultra and Scotts Fungus Clear Ultra Gun) is labelled for the control of other diseases on ornamental plants. These products may give some control of leaf blight on camellia.
The following products contain a combination of both insecticide and fungicide, enabling the control of both insect pests and disease: myclobutanil containing cypermethrin (Westland Resolva Rose 3 in 1, Doff Rose Shield Bug & Fungus Killer, Scotts Roseclear Ultra Gun 2, Vitax Rosegarde) and triticonazole containing acetamiprid (Scotts Roseclear Ultra and Scotts Roseclear Ultra Gun).When a proprietary product contains an insecticide as well as a fungicide it would be preferable to use an alternative product if pests are not a problem on the plants treated.
Inclusion of a product does not indicate a recommendation or endorsement by the RHS. It is a list of products currently available to the home gardener.
Fungicides for gardeners (Adobe Acrobat pdf document outlining fungicides available to gardeners)
Chemicals: using a sprayer
Chemicals: using safely and effectively
Chemicals: storing and disposing safely
Large numbers of spores are produced by the fruiting bodies. The spores are spread by water splash, and will germinate to create new infections if the leaf surfaces stay wet.
The fungi are generally regarded as weak pathogens, and are much more likely to colonise plant tissue that is damaged, dead or that has been weakened by stress factors.
Camellia problems: frequently asked questions
Camellia flower blight
Camellia yellow mottle virus
Disposing of diseased material
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