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Leaf Spot Control in Your Garden

Leaf spot refers to the dead or necrotic regions on leaves that are caused by fungal or bacterial pathogens. When the spots expand into larger areas of dying tissue, this is known as blotch and if the large areas are quickly killed, the disease is described as blight (see What is blight). There are many diseases which are referred to as ‘leaf spot’. Here, we explore the most common leaf spot diseases and how to control them.

Image above: Septoria leaf spot (Septoria spp.)

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