Asked June 14, 2016, 6:46 PM EDT. Photo courtesy of Delaware Cooperative Extension One of the most damaging pests to the Rhododendron species, Azalea Lace Bug can infest large or small plantings of this garden favorite, ravaging the leaves. The bug is normally no more than a few millimetres long with dark colourings. The azalea lace bug is particularly injurious to evergreen azalea (Rhododendron spp.) Both nymphs and adults are black. Rhododendron Lace Bug â Treatment & Control. There are approximately 140 North American species of lace bugs. The nymphs excrete honeydew, a sugary liquid on which sooty mould develops. The rhododendron or azalea lace bug is a pest that gardeners in the south face nearly every year. Lace bugs thrive in sunny locations since their natural enemies avoid these locations. varieties, although deciduous varieties may also be attacked. The introduced avocado lace bug (Pseudacysta perseae) is a pest of avocado (Persea americana) and camphor tree (Cinnamomum camphora). Azalea lace bug adult with light and dark patterns on its wings. 10). Lace bug: The rhododendron lace bug is sporadic, but where it occurs, it causes considerable unsightliness to the leaves of many rhododendron species. Pest description and crop damage Overwinters in egg stage. A typical adult lace bug found on ornamental plants is small (2-5 ⦠Plant lace bug resistant varieties of azaleas. The Tingidae are a family of very small (2â10 mm (0.08â0.39 in)) insects in the order Hemiptera that are commonly referred to as lace bugs . How To Get Rid Of Garden Gravel? Are you noticing leaf stippling, with chlorotic (light-colored) patches or leaves with a burnt, silvery appearance on your rhododendrons and azaleas? Rhododendron varieties that are susceptible to damage should be grown in more shaded locations. Lace Bugs. Azalea Lace Bug Recognition. Pieris Lace Bug Management - Guide. Stephanitis pyrioides . Rhododendron Lace Bug. Most pest species are about three-sixteenths of an inch in length when mature. Description. The rhododendron lace bug, Stephanitis rhododendri, is about 1 / 8 inch long with wide, net-like or lace-like wings. Rhododendron lace-bug & Azalea lace-bug Are you noticing leaf stippling, with chlorotic (light-colored) patches or leaves with a burnt, silvery appearance on your rhododendrons and azaleas? Lace bugs â If the upper sides of leaves are speckled green and yellow, then lace bugs may be at work. Most have a specific host preference, which aids in identification. Adult rhododendron lace bug. The lacy wings (very distinctive) are held flat over the back and are transparent with two dark spots present. Pieris lacebug is a small (3-4mm long) sap-sucking insect with wings marked with a lace-like pattern. Azalea lace bug (Stephanitis pyrioides) Rhododendron lace bug (Stephanitis rhododendri). This lace bug overwinters in the egg stage on the plant. The hawthorn lace bug often attacks cotoneaster, pyracantha, flowering quince, crabapple, mountain ash, and shadbush (Amelanchier) as well as hawthorn, while the basswood lace bug commonly attacks lindens. The rhododendron lace bug also can be found on mountain laurels. Later, the leaves take on a bronzed appearance. Figure 1. Datasheet. The damage first appears as a speckled chlorosis. Evidence of lace bugs on the back of serviceberry leaves. Rhododendron lace-bug, Stephanitus rhododendri, is a fairly common pest of certain Rhododendrons. - 6 Proven Ways. The tiny lace bug does most of its damage in the spring and summer and tends to be most problematic on rhododendrons that have been planted in sunny locations. S. rhododendri has been in The wings on the 1 â 8 inch long lace bug are almost transparent. Adult specimen of a small (about 2 mm) species of lace bug on Lavandula near Cape Town in South Africa: Left, dorsal view; right, lateral view, showing proboscis and dorsal protuberances. Control: Rhododendron lace bugs should be treated when they appear in early May. Contact us if you would like help controlling lace bugs. They may attack rhododendron, mountain laurel and related plants. In the absence of thrips, stippled, excrement-spotted rhododendron leaves signal a lace bug infestation. Black fecal spots will be present on the lower sides of stippled leaves. A new introduction to the PNW, little is known about the phenology of azalea lace bug in this region. Recommended insecticides to control the Rhododendron lace bug are the same as for the azalea lace bug. It is made from a fatty acid. The young insects feed on sap and leave small drops of black excrement in their path. Damage on rhododendrons appears to be more severe than the damage reported from rhododendron lace bug (Stephanitis rhododendri). Clackamas County Oregon. Key Points. On the underside if the damaged leaf, you may find several of the Rhododendron Bugs. As azaleas begin to bloom, the insect begins its lifecycle. It can be responsible for causing pale mottling most notably on the leaves of Pieris and Rhododendron. Recognition and Life Cycle Adults are about 1/8-inch long. The azalea lace bug and andromeda lace bug were both accidentally introduced from Japan. The symptoms are caused by the insectsâ piercing-sucking type of feeding on the undersides of leaves. There are several types of lace bugs, including the rhododendron lace bug and the azalea lace bug. It is, however, rarely diagnosed correctly. Thanks. Lace bugs congregate on the undersides of azalea and rhododendron leaves. Damage Azalea lace bug feeds on both evergreen and deciduous azaleas and rhododendrons. LIFE CYCLE. Damage usually begins in early May on old leaves and later appears on new growth. Lace bugs can be controlled by frequent spraying. It has only been found in the Pacific Northwest since 2008. These insect pests overwinter as eggs that are inserted into plant leaves. There they suck out the sap, robbing the plant of nutrients and causing the leaves to turn speckled grey-brown or silvery. Rhododendron Lace Bug (Stephanitis takeyai) Lace bug damage is indicated by stippling (very tiny spots) on leaves of plants growing on dry sites and those with low plant diversity. The rest of the species are fairly well restricted to their namesake hosts. Azalea and Rhododendron Lace Bug control. Feeding behavior by the rhododendron lace bugs is the same as with azalea lace bugs, and the symptoms that are produced are similar. The leaves are normally mottled on the top surface, but seen to be brown on the underside. What we can do . Rhododendron lace-bug & Azalea lace-bug. Azalea lace bug (Stephanitis pyrioides (Scott) damage is recognized as a stippled, silvery, chlorotic, or bleached appearance of the leaves. The body is pale yellow. Figure 1. 2016/09/30 / Katie Swickard / care, care-rhodys. Eggs are laid in the midrib on the underside of leaves. Three species are common shrub pests: the azalea lace bug, andromeda (Pieris) lace bug, and the rhododendron lace bug. Some of the important species of lace bugs are for the azalea - Stephanitis pyrioides, hawthorn - Corythucha cydoniae, lantana - Teleonemia scrupulosa, and hackberry - C. celtidis.Lace bugs also feed on oak, elm, basswood, fringetree, and pyracantha among others. The rhododendron lace bug is a native species. Females insert tiny, oblong eggs in leaf tissue and cover them with dark excrement. We use M-Pede oil to reduce populations. The Guest Article MANAGEMENT OF LACE BUG AT MTBG Date: 22nd January 2016 author: Kathy Wilson tags: pest & diseases,plant care Management of Lace Bug at Mount Tomah Botanic Gardens. Adult insects are whitish-tan and approximately 0.13 inch long with lacy-looking wings. Symptoms Because lace bugs suck the juices from the leaf, they leave white or yellow spots or marks on the upper surface. Lace bugs are attracted to a wide variety of ornamentals such as azaleas, rhododendrons, viburnums, flowering quince, crabapple and cotoneaster. The release of the predators reduced azalea lace bug counts on leaves as compared to the control group during the first two weeks (Figure 1). With the ongoing âlacebug on rhododendronsâ discussions that inevitably occur amongst Society members and horticulturists, some information from Mount Tomah Botanic Gardensâ Procedures and Plans may be ⦠The nymphs are black, spiny and smaller than the adults. Azalea (Rhododendron)-Lace bug. The azalea lace bug, Stephanitis pyrioides Scott, 1874 (Hemiptera: Tingidae) is an invasive pest from Asia of ornamental rhododendrons and azaleas in the genus Rhododendron (Ericaceae) and was detected in the Pacific Northwest in 2008â2009 (Rosetta 2013).The azalea lace bug feeds on the underside of leaves causing chlorosis, decreased photosynthesis, and eventual plant death (Nair and ⦠If your issue is with specifically azalea lace bugs, you may be able to control the population by planting these varieties: [12] X Research source There are lace-bug resistant varieties, that are usually labeled as suitable for planting in sunny locations. Lace bug damage on evergreens is most common and severe on azalea, pyracantha, rhododendron and andromeda. Adult females cause more feeding injury than adult males and nymphs (Buntin et al. What is the best way to control them? 1 Response. Lace wings have been bothering rhododendrons for a long time, but in the past, they were a fairly easy pest to deal with. Damage (Back to Top) Nymphs and adults cause damage by piercing and removing cell contents from leaf tissues. Nymphs are spiny, and dark, and develop through four growth stages. By the end of the summer, gardeners find their azalea leaves covered with yellow speckles and the plants are ⦠1996). In 2015, we followed up on this experiment by testing green lacewing larvae and MeSA, each alone and combined, on potted rhododendrons placed in the USDA garden and farm. (rhododendron lace bug) Toolbox. Lace bugs that are found in the genus Stephanitis attack broad-leaved evergreens (andromeda, rhododendron, azalea, and mountain laurel) and can cause significant feeding damage. Stephanitis rhododendri (rhododendron lace bug) Index. Lace bugs are small, inconspicuous, plant-feeding bugs. The ⦠Pest description and damage Lace bugs are tiny true bugs which cause significant feeding damage to broadleaf evergreens including andromeda, laurel, pyracantha, and rhododendron. These lace bugs have black bodies about 3 â 8 inch long and grayish wings. Sycamore Lace Bug. This pest feeds on the undersides of the leaves where it deposits tar-like material (Fig. The latter is a native of Japan. These lace bugs are whitish or yellowish with yellowish legs and antennae. Rhododendron Lace Bug causes damage to leaves, causing them to roll downwards. Some varieties of azaleas do not attract lace bugs. It is especially important to prevent damage on evergreens early in the season because foliage will retain unsightly lace bug injury and be less functional for more than a year. Lace bugs develop through three life stages: egg, nymph, and adult and have several generations a year. We have infestation of Azalea Lace Bugs on our Rhododendrons in our home yard. 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