|rusty brown spots on plants that cause the tops to wither and wilt, then rusty brown spots continue to spread down the plant. What is it, how can I control it? Thank you.
|Answer from NGA
July 3, 2010
|Rusty brown spots sound like a fungal disease to me, especially if the spots are slightly raised. You may be able to stop the spread of the disease by using a fungicide on your plants, or if the entire plant is involved you may need to prune it back to remove the diseased parts and then spray with a general purpose garden fungicide. Fungicides will protect unaffected plant parts but will not cure already involved plant parts. I'd prune everything back, and apply a fungicide to protect the new growth from fungal attack. Good luck with your garden.
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