It would take a whole book to understand this wide world! Both rhododendrons and azaleas are attacked by scales.

These insects are flat, tan-colored discs on foliage and stems that at first glance appear to be growths on the leaves rather than insects.

These small sucking insects feed on new growth as it begins to expand causing leaves to twist and curl. Azalea lace bug damage. Apparently scale insects are rather common on rhodies, so I need not stoke fears of radiation due to scale insects… The rhododendron is a commonly used landscape plant that has a specific complex of pests. Azalea bark scale life cycle. Here is a summary of pests, disesases and problems you may find while growing rhododendrons and recommended solutions from various sources. The most common pests of rhododendrons and azaleas in Maryland are lace bugs, azalea bark scale, rhododendron borer, and weevils. The adult female azalea bark scale is dark red with a long sucking mouthpart. Common Insect Pests of Rhododendrons and Azaleas in Maryland. Rhododendron and azalea varieties vary in their susceptibility to some of these pests. You can sometimes pry them off of the leaves with your fingernail or a sharp knife. The most common scale is the azalea bark scale. Heavily infected plants become ragged and sometimes lose branches. The discussion of the following insects will focus on recognition and life cycles, damage, monitoring and control options: Azalea Bark Scale, Erlococcus azalene. Eggs are laid in the spring and hatch from late June through July. Early history. This is a pest that generally does not kill hosts, rather it causes aesthetic damage. Scale insects may appear as small, flattened white, yellow or brown 'discs' or 'blobs', on stems or on the underside of leaves near the veins. There are more than 25 species of scale insect in the UK. Consequently, the taxonomy has been historically complex.. These include Lecanium scale, oystershell scale, azalea bark scale, and several unknown species. These insects have protective surfaces, which make it difficult to control them with sprays. Lacebugs feed by sucking chlorophyll from the leaves of many plants. Mature Lecanium scales appear as tortoise-like bumps (soft) on the bark. Just be patient! Discovered in 1881, the azalea bark scale, Eriococcus azaleas, is a prominent pest of rhododendron, azalea, and huckleberry (Vaccinium spp. They are unusual insects. Recognition and Life Cycle Azalea lace bug damage. The small scale insects 1mm wide are like translucent circles stuck on …


Common name Cushion scale Scientific name Pulvinaria floccifera Plants affected Camellia, Ilex (holly), Euonymus japonicus, Rhododendron, Trachelospermum, Taxus (yew) and some other evergreen plants Main symptoms Black sooty mould on the upper leaf surface in winter-spring; scale insects and white egg masses on the underside of leaves in spring and early summer Scale insects may appear as small, flattened white, yellow or brown 'discs' or 'blobs', on stems or on the underside of leaves near the veins.

Usually, when problems do occur, they can be traced back to the plant's environment. 3. The most common pests of rhododendrons and azaleas in Maryland are lace bugs, azalea bark scale, rhododendron borer, and weevils. A Cushion scale is a small, mostly immobile, sap-sucking insect (Pulvinaria floccifera) that attacks a range of outdoor plants.. Caption: Cushion scale often attacks camellias and causes sooty mould Q What plants does cushion scale affect?. They feed by sucking sap from a wide range of plants, including house-plants, greenhouse plants and many fruit and ornamental plants grown outdoors. Few larger woodland gardens are free of it these days. When rhododendrons and azaleas are properly planted and maintained, insects and diseases are less of a problem.
The "bumps" may be brown or marbled brown and white. ).It has been reported in the Eastern US, as well as Belgium and Russia.


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