Daylily Rust
Daylilies are herbaceous perennial flowering plants that have been bred for a long time by gardening enthusiasts, professional horticulturalists and gardening enthusiasts in the U.S. and Australia for their alluring flowers. Over the past 10 or so years, daylilies have been affected by a fungal infection that is commonly known as daylily rust. The presence of this new pathogen has been a source of agony for most daylily growers because it has been quickly spreading in the recent past. However, knowing about the common signs and symptoms to look out for, and understanding the various strategies for managing the disease can help you manage the alluring charm of your daylilies.
Signs and Symptoms
It may be difficult to see the signs of the rust infection during the early stages in the development of the infection. The most evident symptoms of the disease are yellow to brownish streaks on plant’s leaves. The veins of the plant have a tendency to limit fungal growth, thus making streaks. Additionally, you may see some very small and bright yellow spots on the leaves surface. The leaves undersurface will have a lot of tiny orange to yellowish spots known as pustules. The pustules poke out of the leaf’s undersurface.
As the disease progresses, the pustules increase in size and release some dusty orange coloured spores. If you rub on the leaf’s surface, you will see the dusty stuff lofting about. Although daylily rust can be easily confused with some other look alike problems, these other daylily problems do not produce orange pustules that grow on the leaves undersurface.
Management Strategies - Using Resistant Varieties
Different species of daylily have differing susceptibilities to the rust. To avoid ruining the charm of your garden, choose a variety that is known to be resistant, and never grow both resistant and non resistant varieties at the same site. You can do some little online research on the varieties that have been studied for their vulnerability to the rust pathogen.
Sanitation
To prevent infection and further spread, ensure that you always clean up any plant residue in autumn. Remove any remaining foliage from the site and from the plants. Burning or composting the plant residue in hot composts kills the spores. If you have recently purchased plants you can prune them back in the spring. This will help to minimise the likelihood of introducing the rust causing pathogen in your garden.
Sanitation
To prevent infection and further spread, ensure that you always clean up any plant residue in autumn. Remove any remaining foliage from the site and from the plants. Burning or composting the plant residue in hot composts kills the spores. If you have recently purchased plants you can prune them back in the spring. This will help to minimise the likelihood of introducing the rust causing pathogen in your garden.
Fungicides
Some potentially useful fungicides for the home garden include products that contain neem oil, sulfur, and potassium bicarbonate. Some of these products are currently registered for Treating RUST Diseases Like Daylily Rust. Once the infection becomes established, you may need to apply the fungicide on a weekly basis. This is due to the fact that as the actively plant grows, new rust infections will be constantly beginning. However, you should also ensure that any product you buy is appropriately labeled and registered to treat rust.
Some potentially useful fungicides for the home garden include products that contain neem oil, sulfur, and potassium bicarbonate. Some of these products are currently registered for Treating RUST Diseases Like Daylily Rust. Once the infection becomes established, you may need to apply the fungicide on a weekly basis. This is due to the fact that as the actively plant grows, new rust infections will be constantly beginning. However, you should also ensure that any product you buy is appropriately labeled and registered to treat rust.
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