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Here's how to diagnose and correct the problem. ... Why Your Rhododendron's Leaves Are Rolling Up and Wilting (And What to Do About It) April 23, 2021 at 12:03 PM.
This article is a list of diseases of rhododendron (Rhododendron spp.). Bacterial diseases. Bacterial diseases; Crown gall Agrobacterium tumefaciens: Fungal diseases
Rhododendron ponticum, called common rhododendron or pontic rhododendron, is a species of flowering plant in the Rhododendron genus of the heath family Ericaceae. It is native to the Iberian Peninsula in southwest Europe and the Caucasus region in northern West Asia .
Rhododendron arborescens, also known as smooth azalea [1] or sweet azalea, is a species of flowering plant in the family Ericaceae, native to the eastern seaboard of the United States. It grows to a height of 2.4–3 metres (8–10 ft). Generally blooming in late spring and early summer, the flowers range in color from white to pink with red ...
Phytophthora ramorum is the oomycete known to cause the disease sudden oak death (SOD).The disease kills oak and other species of trees and has had devastating effects on the oak populations in California and Oregon, as well as being present in Europe.
Rhododendron vaseyi, the pinkshell azalea, [4] is a species of flowering plant in the heath family Ericaceae.It is endemic to the Appalachian highlands of North Carolina.The specific epithet vaseyi honors the American plant collector George Richard Vasey and his father Dr. George Vasey, Chief Botanist at the United States Department of Agriculture from 1872 to 1893.
Rhododendron pulchrum (锦绣杜鹃), also identified as Rhododendron × pulchrum, is a rhododendron endemic to China. It grows as a semi-evergreen shrub, 1.5–2.5 m (4.9–8.2 ft) in height, with leathery leaf blades, elliptic-oblong to elliptic-lanceolate or oblong-oblanceolate, 2–5(–7) × 1–2.5 cm in size. The flowers are rose-purple ...
Rhododendron parvifolium subsp. confertissimum (Nakai) A.P. Khokhr. Rhododendron lapponicum , the Lapland rosebay , [ 1 ] is a dwarf rhododendron species found in subarctic regions of North America, Europe and Asia, where it grows at altitudes ranging from sea level to 1,900 m (6,200 ft).