Sooty mould is a fungal disease often associated with sap sucking insects. It grows on the sweet honeydew that scale, aphids and others produce.
Sooty mould is found affecting many plants. It is often an indicator that the tree or plant is being attacked by sap sucking insect pests such as scale or aphids. The sap sucking insects produce the honeydew as a waste products and the mould grows on the sticky sweet substance.
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