Want to learn more about Plant Symptoms - Orange Powdery Spots (Fungal Rust)
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WHY DOES THIS HAPPEN
Orangey-brown spots can form on the foliage of plants as a consequence of a fungal infection known as Fungal Rust Disease.
Fungal infections tend to develop under conditions of warmth, humidity, and low light intensity. Fungal rust is no exception to this - it's often seen when leaves are kept wet for prolonged periods of time, such as after long periods of heavy rain or if a plant has been misted too much. Once it takes hold, it can very quickly spread.
In particularly bad cases, your plant may unfortunately die, but generally its overall health will be affected and the plant will become weaker.
Fungal Rust disease is usually quite simple to identify due to its characteristic rust-like spots. These spots are actually pustules that contain fungal spores and can occur on both the underside of the leaf as well as on its surface. Look out for:
Orange-brown spots / pustules with a powdery consistency
Loss of foliage
Yellowing of your plant's leaves