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This article is a list of diseases of rhododendron (Rhododendron spp.). Bacterial diseases ... Cercospora leaf spot Pseudocercospora handelii
Pestalotia rhododendri is a fungal plant pathogen infecting azaleas and rhododendrons. [1] Important diseases: Pestalotiopsis tip blight of conifers, Gray leaf spot Pestalotia is primarily a secondary pathogen. It is saprophytic on dead and dying tissues and is weakly parasitic infecting wounds under moist conditions.
1 Fungal diseases. 2 Nematodes, parasitic. ... This article is a list of diseases of azalea (Rhododendron spp.). Fungal diseases ... Cercospora leaf spot
Why Your Rhododendron's Leaves Are Rolling Up and Wilting (And What to Do About It) April 23, 2021 at 12:03 PM. Droopy or curled up foliage on this shrub is a sure sign your plant isn't happy ...
On the shrubs of Rhododendron, the disease starts with the blackening of the leaf petiole sometimes extending to the base of the leaf, affecting old and young leaves equally. [5] In addition to this darkening lesion on the stem, leaves can get severe enough lesions to become necrotic and cause entire leaf death. These lesions begin as a ...
Caused by the Ovulinia azaleae fungus, the disease develops during periods of moist weather at flowering time. Early- and late-flowering cultivars or species tend to escape the disease. The fungus overwinters as sclerotia on diseased petals adhering to plants, on the soil surface, or in leaf mulch under the bushes. [4]
Exobasidium vaccinii, commonly known as “red leaf disease,” or “Azalea Gall,” is a biotrophic species of fungus that causes galls on ericaceous plant species, such as blueberry and azalea (Vaccinium and Rhododendron spp.). Exobasidium vaccinii is considered the type species of the Exobasidium genus. [1]
Use an acidic soil mix with good drainage, such as one labelled for rhododendrons and azaleas or camellias. A mixture of equal parts coarse sand, finely shredded pine bark, and oak leaf mold also ...