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Gardening Know How Questions & Answers - https://questions.gardeningknowhow.comSomething attacking plants which is spreading along the borders. We thought it was a sooty mould which appeared first on Fatsia Japonica. Sprayed with dilute washing up liquid as advised but no positive result. Has spread to other plants, Oleander, Euphorbia and roses. Please can you identify and advise possible treatment? Many thanks!
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1 Comment To "Pest Or Disease? Help Please!"
#1 Comment By luis_pr On 08/02/2021 @ 7:25 am
I would concentrate of the causal agent. Aphids, mealybugs, leafhoppers, thrips and scale insects drink plant sap and excrete the sticky liquid called honeydew, which may attract ants. Then fungi grows on the honeydew, which creates the black sooty mold. So, research what insect is causing the problem (take samples in sealed plastic bags to a nearby plant nursery) and apply appropriate counter measures. Note: the insects may have already left.