rust - Knowledgebase Question

san jose, ca
Avatar for billevansa
Question by billevansa
June 4, 2006
I get a lot of rust on my roses every year even if I use Immunox-
multi-purpose fungicide. some get morning sun some get after noon
sun, I water them 2 time a week and feed them 1 time every month.
they still make flowers but the leaves just drop off, and it makes
the plant look bad. ( help )

Answer from NGA
June 4, 2006
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. Hope this helps!

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