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Daylily
Hemerocallis 'Stella D'Oro'
51.7907, -114.095
Field Notes
Description:
The common Daylily is native to Asia and grows to be about one foot in height as well as spread. It grows best in medium moisture soil and can be grown in sun or partial shade. The soil can be normal, sandy or clay which makes this plant very adaptable. Some common pests of the Daylily include Aphids, Mites and Thrips. A common disease of the plant is a fungus with the name Daylily Rust.
Several of the leaves on the Lily located in the Botanic Garden were yellow, brown and dry. Some of the foliage have black spots on the leaves. The plant also appeared to be pushed over to the east which is likely from wind.
Habitat:
The Lily in the Botanic Garden is located on a raised garden bed to prevent foot traffic and animal damage. It is partially shaded by a shrub south of the Lily which will give protection from wind and sun. There is an irrigation system located in the garden bed to provide water. The soil appears to be deep and has medium moisture. Cooler temperatures bring frost and snow damage to foliage as well.
Notes:
The substantial concern is the yellow/brown leaves of the Lily. This is likely caused by the fungus 'Puccinia hemerocallidis,' also known as Daylily Rust. Daylily Rust was discovered in North America in 2002. The fungus begins with orange pustules located on the leaves which will turn the leaves yellow and dry as it progresses. Aphid damage looks very similar but lacks the pustules which are shown in the fourth photo. A method of prevention would be to plant resistant strains to the fungus. Sanitation is also important in preventing the spread of the fungus. Ensure the proper cleaning of pruners and tools after use. If Daylily Rust is spotted, immediately remove all the remaining foliage and burn it. Another solution would be to use a registered fungicide. Begin fungicide applications in early summer. Some less infected plants may benefit from systemic fungicides.
The fourth photo is taken from the website:
http://1.bp.blogspot.com/-XgDDF0GJnLA/TZyPIhQd8XI/AAAAAAAABfo/YbgyyvaGQ…
References:
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