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This article is a list of diseases of rhododendron (Rhododendron spp.). Bacterial diseases. Bacterial diseases; Crown gall Agrobacterium tumefaciens: Fungal diseases
This article is a list of diseases of azalea (Rhododendron spp.). Fungal diseases. Fungal diseases; Anthracnose Glomerella cingulata
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]
Major diseases include Phytophthora root rot, stem and twig fungal dieback. [60] Rhododendron bud blast, a fungal condition that causes buds to turn brown and dry before they can open, is caused by the fungus Pycnostysanus azaleae, which may be brought to the plant by the rhododendron leafhopper, Graphocephala fennahi. [61]: 562
List of Award of Garden Merit rhododendrons; List of azalea diseases; List of rhododendron diseases; Rhododendron lochiae; Rhododendron loerzingii; Rhododendron longipes;
Droopy or curled up foliage on this shrub is a sure sign your plant isn't happy. Here's how to diagnose and correct the problem.
Leather rot of strawberry is an additional disease affecting strawberry plants, with P. cactorum being the causal agent. Symptoms of this disease include brown patches or green patches with a brown border in immature fruit, with infected mature fruit displaying a purple to brown color, and becoming hard, leathery, or even mummified.
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.