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Azalea leafy gall can be particularly destructive to azalea leaves during the early spring. Hand picking infected leaves is the recommended method of control. [4] They can also be subject to Phytophthora root rot in moist, hot conditions. [5] Azaleas share the economically important disease Phytophthora cinnamomi with more than 3000 other plants.
This characteristic makes it easy to identify the species. The flowers have white tubes. This azalea is sometimes also called the smooth azalea for its new leaf growth has no hair, making it smooth to the touch. The leaves range from a blue-green, dark green, or a medium green, and the underside is a light white color. The leaves are usually ...
Caloptilia azaleella deposits its eggs on azalea (Rhododendron spp) plants, under leaves near the midrib. These are the only hosts so far recorded. [2] The larva initially forms a mine and later rolls the leaf downwards from the tip, forming a cone. [6]
Rhododendron luteum, the yellow azalea or honeysuckle azalea, is a species of flowering plant in the heath family Ericaceae, native to southeastern Europe and southwest Asia. In Europe, it occurs from southern Poland and Austria, south through the Balkans , and east to southern Russia; and in Asia, east to the Caucasus .
Rhododendron periclymenoides, the pink azalea [1] or pinxter flower, is a species of shrub in the heath family Ericaceae. It is native to eastern North America, where it is widespread from Alabama to New Hampshire. [2] It is often found in riparian areas, in wet to dry forests. [3]
Rhododendron (/ ˌ r oʊ d ə ˈ d ɛ n d r ən /; pl.: rhododendra) is a very large genus of about 1,024 species of woody plants and in the heath family (Ericaceae). They can be either evergreen or deciduous.
Rhododendron occidentale, the western azalea [1] or California azalea, is one of two deciduous Rhododendron species native to western North America (the other is Rhododendron albiflorum). The western azalea is known to occur as far north as Lincoln and Douglas Counties in Oregon and as far south as the mountains of San Diego county.
Rhododendron austrinum is a species of flowering plant in the heath family known by the common names Florida flame azalea, honeysuckle azalea, southern yellow azalea, and orange azalea. It is native to the southern United States, where it can be found in Alabama, Florida, Georgia, and Mississippi. [1] It is also a common ornamental plant. [2]