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 Honey fungus
Plants affected: Woody plants.
Symptoms: Affected plants die back. Clusters of honey-coloured toadstools appear close to dying trees or shrubs in late summer or autumn. Black bootlace fungi, which smells like mushrooms, is present under the dead bark. At soil level under the bark you can usually see white fungal growth.
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Prevention/Control: There is no known cure, but honey fungus tends to attack stressed plants, especially woody plants, so keep plants healthy by caring for them. Dig up and burn infected plants, removing as much of the roots as possible. If you replant, choose less susceptible plants and change the soil before planting.
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 Rust
Plants affected: Most rusts are specific to a particular species of plant. Hollyhocks, roses, pelargonium and leeks are popular targets.
Symptoms: Reddish brown spots and powdery pustules that look like rust.
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Prevention/Control: Grow resistant varieties and sow hollyhocks from seed every year. Spray with a suitable fungicide, such as one containing mancozeb or penconazale.
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