The wings are highly sculptured, giving them a lacy appearance. Azalea diseases pictures. Identify symptoms of the disease on the azalea to make sure the infection is present. This condition is caused by a fungus called Botryosphaeria dothidea. Fungal Diseases in Azaleas. Other Azalea Problems. The name Azalea is used to refer to evergreen Oriental species and hybrids, as well as deciduous native plants. Look for a fungicide at your local nursery. Fungi on Azaleas. Azalea Lace Bug: Azalea lace bug (Stephanitis pyrioides) is a major pest of azaleas in South Carolina.Lace bug adults are about ⅛-inch long. Azalea plants are members of the Rhododendron species, and sometimes the names are used interchangeably. The Rhododendron genus encompasses a wide range of shrub species, including azaleas. Rhododendron spp.. Anthracnose – Leafspot and Dieback (fungus – Glomerella cingulata): Symptoms on leaves are characterized by numerous small, round spots on both leaf surfaces.The spots are light to rusty-brown with a definite margin. Look for tiny, round, yellow spots on the upper surfaces of leaves, and orange colored pustules on the undersides. The adults also have some dark markings on the back and wings. Azaleas (Rhododendron spp.) Page last updated: Monday, 9 June 2014 - 9:36am. herald spring with a profusion of flowers in U.S. Department of Agriculture plant hardiness zones 5 through 9. Azalea pests and diseases. Normally this problem strikes during late summer. Of all the azalea health problems that you may encounter, fungal diseases are probably the most common. For this one check the soil conditions, Dry, Wrong Ph, Low on nutrients then your Azalea is stressed and probably has a fungal disease. Under severe conditions, the … Admin March 10, 2020. The most common rhododendron disease is stem dieback, which is characterized by death of the branches, in an otherwise healthy plant. A few to watch for include: Leaf Spot Fungus: This is characterized by red to brown colored round spots on the leaves. Most diseases dont warrant chemical treatment, except for in cases of severe infection. Avoid treating the azalea for rust without making sure it is infected. Leaf rust is a common azalea fungal disease that, though rarely serious, causes unattractive foliage spots. Insecticidal Soap As An Azalea Lace Bug Control by Stanton A. Gill & Michael J. Raupp Root Weevils: Troublesome Rhododendron Pests by Hank Helm Thrip Information by UC Davis IPM. If the foliage looks,’Rusty’, yellow to orange / red markings then you have Azalea Rust. Rust – Yellow Markings on Azaleas. Rhododendron shrubs are susceptible to many different diseases, both fungal and viral in nature. It has been observed that the inner parts of the bark of the dying branches develop a reddish brown discoloration. Rhododendron usually refers to evergreen plants with large, leathery leaves. Azaleas are perennial members of the Rhododendron genus, commonly grown for their showy, spring blooming flowers. Like any plant in the garden, azaleas are susceptible to a range of specific diseases which may mar the beauty of the plant. Powdery Mildew Extension service websites with advice on dealing with insects and diseases: Consult these sites for photos of insect and disease problems. If azalea foliage or flowers are being spoiled by lace bug or petal blight, preventative action – taken at the right time of year – can ease the problem. Please note: This content may be out of date and is currently under review. Disease is stem dieback, which is characterized by death of the bark of the bark the... 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