The Q&A Archives: Rust Fungus on Roses

Question: I have had an ongoing rose problem for almost one year. The leaves on the roses turn yellow and or rust colored. I have spayed a rose fungus spray on them about every 3 or 4 weeks but the problem continues.

I recently prunned the roses, removed all the yellow leaves including the ones on the ground.

What can I do to elminiate this problem once the roses grow again.

Answer: Rust is common on roses and unfortunately there is no way to completely eradicate this disease. At the first sign of rust, pick off and destroy the infected leaves and spray with a fungicide (either organic or synthetic). Carefully follow application instructions specific to your plant; generally this is every 7-14 days as long as conditions are favorable for infection (moist, foggy, 55-75 degrees F). Practice good garden sanitation: rake up and destroy all infected leaves, prune off and destroy infected twigs. Also, look for roses that are resistant to rust.

Be sure that your roses receive all day sunshine and are pruned to keep the center of the plant open, to encourage good air circulation.

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