Join our mailing list to receive the latest updates from HGIC. Handling an Infestation Rinse plants that have a minor infestation. However, these products must directly coat the lace bugs’ exoskeleton to suffocate them. Regularly take leaf samples and look at the top and underside of leaves with a magnifying glass. You may freely link Keeping Pesky Insects out of the Flower Bed. In the event of heavy infestations, spraying azaleas with a systemic insecticide – which the bugs ingest when they suck the sap – is effective but timing is crucial. The best time to do this is early spring when the lace bugs are in the nymph stage. Unfortunately azaleas have a reputation of being prone to pests and diseases. The active ingredient is listed on the label, usually toward the bottom in small print. The first method to try is to spray the plant down with a sprayer on the hose. Copyright © 2020 Clemson UniversityClemson Cooperative Extension | 103 Barre Hall Clemson, SC 29634864-986-4310 | Contact UsHGIC@clemson.edu, College of Agriculture, Forestry and Life Sciences, How to Tell the Difference Between Goldenrod and Ragweed, Centipedegrass Yearly Maintenance Program. If you have a more advanced problem with lace bugs, there are some chemical control options. Once the leaf is lifted and you look underneath, infestation will be obvious. Lace bugs do not travel far or fast and it takes a long while for them to reach harmful numbers. Apply these types of products directly and carefully to the lasce bug infestation. Azalea lace bug, Stephanitis pyrioides(Scott), belongs to a group of insects in the family Tingidae. Choosing the right planting site and maintaining proper fertility based on recommendations provided by a soil test can go a long way in preventing future problems. There are approximately 140 North American species of lace bugs. Shiny droplets on the underside of leaves is another telltale sign that lace bugs have been present. Lace bugs attack new foliage and they like to hide under the leaves, it gives the… Asked December 1, 2018, 1:08 PM EST. Identifying Lace Bug Damage. However, these chemicals also kill or repel natural enemies and other beneficial insects. Avoid using broad-spectrum insecticides and plant native perennials to attract beneficial insects into the landscape naturally. Azalea lace bug nymphs and fecal spotting on the underside of a rhododendron leaf Azalea lace bug eggs covered by excrement are often inserted into the midrib of a leaf. Lace Bugs . Azalea lace bug nymph.Tracy Wooten, University of Delaware, Bugwood.org. Wonderful flowers but sick looking foliage is not the best look, so what causes Azalea foliage to look so untidy? Symptoms Because lace bugs suck the juices from the leaf, they leave white or yellow spots or marks on the upper surface. For organic control of these azalea insects, you can try several methods. The first signs of the azalea leaf bug infestation are similar to those of other unwanted pests. Reduce the plant stress by providing the proper growing conditions and shade for azaleas. Most pest species are about three-sixteenths of an inch in length when mature. If you find that you still have lace bugs, a light infestation can be cured by spraying hard jets of water on the underside of the leaves. For season-long prevention and control of lace bugs and other leaf sucking or chewing insects a systemic insecticide drench containing Imidacloprid can be applied around the roots of the plants in late winter or early spring, when the azalea is in … For more information, see Attracting Beneficial Insects. Another pesticide option is to use a systemic insecticide like imidacloprid (click for sources) that poisons the sap of the azalea. Symptoms start on the underneath of the leaves, but unless you check them regularly, you won't notice until they've progressed to the upper part of the foliage. to this site, and use it for non-commercial use subject to our terms of use. Only use synthetic chemical controls on lace bugs as a last resort. In many cases it is Lace Bug, you can barely see them, but if you take the time to look at the underside of the foliage you can see little black spots. Most homeowners are familiar with the Azalea lace bug, a tiny, clear winged insect that feeds by sucking on the underside of azalea leaves. Are your azalea plants not looking its best? Sometimes you will see the actual adults. Lace bugs are important pests of many ornamental trees and shrubs. To reduce pests and other stress factors on azaleas, plant them in the shade. ability to produce food, decreases plant vigor and causes the plant … With extensive damage, leaves may turn completely brown and die, falling from the limbs. Lace bugs are attracted to a wide variety of ornamentals such as azaleas, rhododendrons, viburnums, flowering quince, crabapple and cotoneaster. Systemic pesticides are usually taken up by the plant’s roots and distributed throughout the plant’s tissues. Lace bug-infested leaves typically feature whitish, flecked damage. In the flower garden, the most likely victims of lace bugs are azalea … Copyright© Lace bug damage to the foliage of trees and shrubs detracts greatly from the plants? They attack a broad range of evergreen and deciduous trees and shrubs and often go undetected until the infested plants show severe damage. Azalea lacebug symptoms. Soap and oil sprays have no residual effect, so beneficial insects are not harmed once the spray has dried. During the spring, use horticultural oils, insecticidal soaps or insecticide sprays to control the insects. We welcome your comments and Key Points. Yes, this is a severe infestation of azalea lace bugs. Eggs are laid in the midrib on the underside of leaves. Therefore, planting a wide variety of species in the landscape prevents the insect from spreading. Azalea Lace Bug (Stephanitis pyriodes) and Rhododendron Lace Bug (Stephanitis takeyai) Lace bug damage is indicated by stippling (very tiny spots) on leaves of plants growing on … Systemic insecticides also work to control the insects if applied in the spring. Imidacloprid is Leaf damage cannot be reversed. Hosing the azalea shrub off with a strong jet of water can help control a light infestation. Lace bugs feed with piercing-sucking mouthparts during both the nymph and adult life stages. By learning the characteristics of an azalea lace bug infestation, and knowing proper treatments, you can cure your azalea and prevent future lace bug outbreaks. Consider planting the azalea in a shady location where the azalea lace bug will be more susceptible to predatory insects, according to the University of Florida IFAS Extension. One of the most common problems with azaleas is the ‘black spots’ that appear on the foliage. Adults are a cream color and grow to be about an eighth of an inch long, with wings that are partially transparent and extend the length of their bodies. Products with the active ingredients organophosphate (malathion) and pyrethroid (bifenthrin and permethrin) are very effective in controlling lace bugs. Good culture practices are a key element of keeping plants resistant to bugs and germs. They can be applied around the roots of azaleas, after flowering, to achieve season-long control. 1995-2018 MH Sub I, LLC dba Internet Brands. Work compost into the soil and … Lace bugs can be managed using several methods. For example, look out for azalea lace bug on the leaves. Azalea lace bugs can be a very destructive pest in home landscapes. The azalea lace bug can cause significant damage to the leaves of azalea bushes. They have thin lacy outgrowths on their thorax, and have delicate lace-like forewings (Drake and Ruhoff 1965). However, these products must directly coat the lace bugs’ exoskeleton to suffocate them. If you find that you still have lace bugs, a light infestation can be cured by spraying hard jets of water on the underside of the leaves. All neonicotinoid treatments significantly reduced azalea lace bugs by 60 days compared to the untreated control. These are called lace bugs because their wing patterns make it look as though they're made of lace. White or yellow spots or marks on the upper suface of the leaves. If this pest isn't taken care of early in the season, extensive damage to foliage can occur. This is usually the easiest method to achieve control. It had only one generation per year, hence only one treatment generally was required to control the insect. Many azaleas with problems are not planted correctly. Lace bugs thrive in the sunshine. Prolonged high populations of lace bugs may cause premature drop of some leaves and a modest reduction in plant growth rate. Many of these have formulas meant to spray directly onto foliage or work into soil. suggestions. Several natural enemies, including parasitic wasps, predatory assassin bugs, lacewing larvae, lady beetles, jumping spiders, pirate bugs, and mites attack lace bugs. Website operating Lace Bug. This can knock the pests of the plant and disorient them enough to … Andrew "Drew" Jeffers, Spartanburg Cooperative Extension, Horticulture and Natural Resource Agent, Clemson University. Azalea lace bug. All rights reserved. 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. 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