Answer: You didn't give us many clues to go on. It would be helpful to know the name of the plant that's affected so we could offer some control strategies. If the rusty colored leaves have raised orange areas, it's a fungal disease. At this point, without knowing what the plant is, the best control is to cut off the affected leaves and remove them from the garden. If you submit another question to this forum with more details about the plant and the name of the plant, we can offer more solutions.
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