94+ Rust Leaf Spot Rust Azalea Diseases

Cercospora leaf spot circular to irregular brown spots up to 1 2 inch in diameter form on leaves especially lower leaves. The most common include.

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ensemble Rust leaf spot rust azalea diseases!!!

Look for a fungicide at your local nursery. Most leaf spot diseases affect only a small percentage of the tree s overall leaf area and are a minor stress on the health of the tree. Leaf rust is a common azalea fungal disease that though rarely serious causes unattractive foliage spots. If they are you have to get complete coverage of the undersides of the leaves for adequate control.

For cercospora leaf spot on rhododendron use propiconazole thiophanate methyl chlorothalonil or mancozeb. The leaves become curled fleshy and pale green to white. Rhododendron leaves begin to cup and curl at the edges when temperatures drop to below 35 ºf. Spots may become tan in the center and may have a yellow halo.

A systemic insecticide labelled for lace bugs can also be used. Leaf spot diseases should be taken seriously if they result in moderate to complete leaf loss two to four years in a row. Identify symptoms of the disease on the azalea to make sure the infection is present. Affected leaves eventually turn brown and should be removed and destroyed.

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