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Diseases and pests of rhododendrons; Images of diseases and pests of rhododendrons This page was last edited on 20 March 2022, at 16:40 (UTC). Text is available ...
1 Fungal diseases. 2 Nematodes, parasitic. 3 References. Toggle the table of contents. ... This article is a list of diseases of azalea (Rhododendron spp.). Fungal ...
Rhododendron periclymenoides is susceptible to problems caused by both insects and disease. Common insects which cause damage to R. periclymenoides are aphids, nematodes, borers, lace bug, mites and whitefly. Common diseases include crown and root rot, leaf spot and powdery mildew.
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 ...
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]
Rhododendron borers and various weevils are major pests of rhododendrons, and many caterpillars will preferentially devour them. Rhododendron species are used as food plants by the larvae ( caterpillars ) of some butterflies and moths ; see List of Lepidoptera that feed on rhododendrons.
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 ferrugineum: alpenrose, snow-rose, rusty-leaved alpenrose Ericaceae: It is moderately toxic, containing arbutin, arecoline and rhodoxanthin, and can cause vomiting, and difficulties of the digestive, nervous, respiratory and circulatory systems. [citation needed] Rhododendron luteum: yellow azalea, honeysuckle azalea Ericaceae