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Hortsense fact sheets
| Ornamentals
| Shrubs
| Rhododendron
Rhododendron
Disease
Armillaria root rot
Botrytis shoot blight
Gray blight
Leaf spot
Lime-induced chlorosis
Marginal leaf necrosis
Physiological leaf spot
Phytophthora blight
Phytophthora root rot
Powdery mildew
Ramorum leaf and shoot blight (Sudden oak death)
Rust
Salt injury
Sunburn
Tissue proliferation
Insect
Aphids
Azalea bark scale
Caterpillars
Lecanium scale
Rhododendron lace bug
Rhododendron whitefly
Root weevils
WSU Extension Presents
Hortsense
Fact sheets outline IPM strategies including cultural, mechanical, biological, and chemical methods.
Pesticides listed in the fact sheets are examples of products that are legal for use in Washington.