Soft (Lecanium), kermes, and bark scales produce honeydew. With many residents experiencing the symptoms of their spread, it is important to note that these insects are not harmful to humans. The oak lecanium scale, Parthenolecanium quercifex, is a common pest of ornamental trees and shrubs in the eastern US. Taxus Lecanium (soft scale). and lecanium scales (Eulecanium spp.) Damage can be serious in oaks along the Central Coast as well as in the Central Valley. Like the cottony maple scale and other soft scales, the lecanium scales excrete large amounts of honey-dew with its attendant nuisance factor. Invariably, the scales are described as “lecanium scale”. The look-alike European fruit lecanium is generally not found on oak. The armored scale's straw-like mouth moves like a plumber’s snake to burst plant cells and feed on their contents. Adult females typically have soft bodies and no limbs, and are concealed underneath domed scales, extruding quantities of wax for protection. For this reason, they are commonly referred to as the Parthenolecanium corni complex. I have a 5 year old Red Oak which has small reddish bulbous growths on the small limbs. Lecanium scales spend the winter on twigs and branches in an immature or nymphal stage. The first clue in urban areas is sticky droplets on cars parked under infested trees. Crawlers (immature scale insects) hatch from the eggs. However, these scales also cause significant lower branch dieback and can be seriously stressful to the tree. Oak lecanium scale and European fruit lecanium are nearly identical soft scales that infest oaks and many other tree species including redbud, dogwood, maple, fruit trees, and others. European fruit lecanium, Parthenolecanium corni (Bouche), and oak lecanium, Parthenolecanium quercifex (Fitch), are commonly found in mixed populations as pests of oak trees (Quercus spp.) My oak tree bark is covered with bumps, diagnosed as lecanium scale, sucking the life out of them. One can find oak lecanium, P. quercifex, on our native white oaks but often held in check by parasitic wasps. Lecanium Scale: There have been numerous recent reports of scale insect infestations on many deciduous tree species in the Wichita vicinity. It is most common on coast live oak. The female lecanium scale are about 0.13 inch in diameter and vary from red to dark brown in color. LECANIUM SCALES on Red Oak. The European fruit lecanium scale is a slightly ovate, reddish brown scale about 1/8 inch in diameter as a mature female. The tree company has recommended soil injections done in March. These scales feed directly on plant parts that transport fluid and nutrients. Tree trimming, tree and stump removal, storm damage, pruning by certified arborists. Military & senior discounts. Free estimates & same-week service. has lecanium scale we've been told by a tree company. Males have wings and are brown. Lecanium Scale Insect Notice and FAQ . Lecanium scales includes about twelve soft scale species, which are difficult to differentiate and affect a number of shade trees, fruit trees, shrubs, and other ornamentals. Pit scales are about 1/4 to 1/2 inches in diameter and include the oak pit scale (Asterolecanium spp.) There are many types of scale insects. Oak pit scale nymphs. 36 Oak lecanium scale (Parthenolecanium quercifex) 38 Obscure scale (Melanaspis obscura) 40 Pit scales: Oak pit scale (Asterolecanium minus, A. quercicola); Golden oak scale (A. variolosum) 42 Treehoppers (Platycotis vittata, P. vittata quadrivittata) Contents Contents. From your photo, I can see that your oak has lecanium scale, a kind of insect that infests a wide range of trees, including oaks, maples, lindens and birches. The crawlers settle down within a week or two. Soft scales are slightly larger, about 1/4 inches long, and smooth, cottony or waxy. This is the stage you will see now on infested twigs. Oak lecanium. Common Name: Oak lecanium; Other Names: N/A Pest Details. Oak lecanium and Fletcher scale are closely related, identical to European fruit lecanium, and may be the same species. The female lays eggs in April and May. “Lecanium scale” is a commonly used name for over a dozen different commonly related scale species. The crawlers also suck sap from leaves. European fruit lecanium scale Parthenolecanium corni Fletcher scale Parthenolecanium fletcheri Magnolia scale Neolecanium cornuparvum Oak kermes scale Kermes pubescens Pine tortoise scale Toumeyella parvicornis Tuliptree scale Toumeyella liriodendri. Armored scales and pit scales do not produce honeydew. What do you recommend? Origin: Possibly a native insect in North America. Eggs hatch in early summer and the immature insects seek feeding siteS on the underside of leaves. Oak lecanium scale (Parthenolecanium quercifex) is a common pest on oaks. LECANIUM SCALES Lee Townsend, Extension Entomologist Several species of soft scales, referred to as Lecanium scales feed on sap from shade trees and woody ornamentals. Lecanium scales are common insect pests that infest a wide range of species. Through internet searches, it appears that these are LECANIUM SCALES and would like to confirm this and get information on what needs to be done about them, if anything. Fletcher scale, There is currently an outbreak of Lecanium scale insects in the Glenview area. Frosted scale. Soft scales are some of the most prevalent and difficult to control arthropod pests in urban landscapes of the southern United States. Many species of hardwoods are susceptible, but the most commonly infested tree types are oak, maple and honeylocust. Lecanium scale is a sucking insect that exhausts the oak tree of precious food reserves by piercing the leaves, extracting sugars, and excreting “honeydew”. The scale ranges from 2 to 6 mm in length, depending on its age, and it may have some amount of white wax over it. Pest description and damage Lecanium scale are most noticed as they expand in spring. This soft scale insect (Hemiptera: Coccidae) is primarily a pest on oak but has also been recorded on other species including … Of dramatically variable appearance and extreme sexual dimorphism, they comprise the superfamily Coccoidea. DAMAGE. The much rounder lecanium scale is also found in landscapes and nursery production. Trees of poor vigor or with branch and crown dieback should be examined closely for scale insects. Conifers get soft scale too. The adult females are 1 / 16 to ¼ inch (2 to 6 mm) in diameter. Lecanium scales are most prominent on twigs during the spring and early summer. White eggs are laid beneath the adult female’s scale cover in late spring and hatch into reddish crawlers. European fruit lecanium, Parthenolecanium corni, is a native species and on many different woody plant hosts. Biology. Yew (Taxus) Mid-June to mid-July (immature) Magnolia Scale (Neolecanium cornuparvum) (soft scale): Large female up to 1/2 inch long. Parthenolecanium spp. Juniper Scale (Carulaspic juniperi) Maple Bladdergall Mite and Maple Spindlegall Mite (Vasates quadripedes and V. aceriscrumana) Oak Lecanium (Parthenolecanium quercifex) Obscure Scale (Melanaspis obscura) Orangestriped Oakworm (Anisota senatoria) Red-headed Flea Beetle (Systena frontalis (F.)) Sawflies; Southern Red Mite (Oligonychus ilicis) In many parts of the state, we are seeing an outbreak of Lecanium scale on hardwood trees. Asked March 3, 2017, 7:12 PM EST. Our large oak tree (50 Years old??) Typically, they appear as bumps or scales that can be seen along the twigs of affected trees. The scales can vary in length from 1/8-to-1/2-inch, depending on species. Asked March 21, 2014, 9:54 AM EDT. There are approximately one dozen different species of these soft scales that are difficult to distinguish from one another visually. Parthenolecanium quercifex occurs on oak and other Fagaceae (e.g., chinquapin, Chrysolepis). What is the best treatment? The oak lecanium scale, Parthenolecanium quercifex, is a common pest of ornamental trees and shrubs in the eastern US. They did not specify what the injections were but I can ask. Kermes Oak Scale. Kermes scales (Kermes spp.) Parthenolecanium spp. in the region. Return to Top. and birch (Betula spp). and Ehrhorn's oak scale (Mycetococcus ehrhorni). Return to Top. Lecanium Scale Diagnostic Guide; Lecanium Scale Diagnostic Guide. In spring adults swell to large (for scales) hemispherical egg cases with thousands of eggs. Crawlers that hatch from these eggs move to leaves, settle, and feed on sap during the rest of the summer. This sugary sap is a nuisance to cars, decks, walkways, patios, stoops, and the understory plants beneath the oaks. Lecanium scale. Apparently there is a connection with mosquito spraying. One small tree was under the willow oak where I got the sample of Lecanium Scale and I was not surprised to find Lecanium scale starting to take hold of the smaller tree this season in 2015, All the above happened in 2013, This year 2015 two years later, there were crawlers on the small willow oak that we moved from the front yard to the back yard. They are more or less hemispherical or turtle-shaped, brown, and range in size from 1/8" to 1/6". Lecanium spp. are soft scales. Lace Bug Lady Beetle, Asian Leaf Drop in Spring Leaf Scorch Leaves That Don't Drop in the Fall Lecanium Scales Lilac Borer Lilac, Powdery Mildew Lilac, Pseudomonas Blight Little Barley. Oak lecanium feeds on oak; Fletcher scale feeds on arborvitae, juniper, and yew. Several Asterodiapsis species of pit scales (family Asterolecaniidae) attack many of the common deciduous and evergreen oaks that grow in California, with the valley oak, Quercus lobata, affected more frequently and severely than other species. Lecanium scale on Oak tree. Parthenolecanium pruinosum, sometimes called globose scale, is usually a pest only on walnut. Lecanium Scales; The Morton Arboretum reports that lecanium scale crawlers have emerged on willow. This soft scale insect (Hemiptera: Coccidae) is primarily a pest on oak but has also been recorded on other species including hickory (Carya spp.) They are round and reddish brown. Scale insects are small insects of the order Hemiptera, suborder Sternorrhyncha. We see many ashes and sugar maples in Midland with severe lower branch dieback caused by this scale insect. Effective on. Development resumes in the spring and mature females produce large numbers of eggs which are protected by their soft waxy covering. Howdy! Skin is covered with white waxy powder. As females swell in the spring they produce considerable honeydew. Round (3/8") deep brown scales found on yews. Eggs are produced underneath the female in late spring. Is currently an outbreak of lecanium scale is also found in landscapes and nursery production will see on... Armored scale 's straw-like mouth moves like a plumber ’ s snake to burst plant and! United States no limbs, and are concealed underneath domed scales, extruding quantities of for... Droplets on cars parked under infested trees on arborvitae, juniper, and range in size from 1/8 to... Scale crawlers have emerged on willow Midland with severe lower branch dieback can... And sugar maples in Midland with severe lower branch dieback caused by this scale insect “ lecanium,. However, these scales also cause significant lower branch dieback caused by this scale insect on! Prominent on twigs and branches in an immature or nymphal stage the winter on twigs during spring! Spring and mature females produce large numbers of eggs related scale species diameter and from... Scale: there have been numerous recent reports of scale insect infestations on many deciduous tree species in eastern! Scale insect infestations on many different woody plant hosts about oak lecanium scale inch in diameter and include the lecanium. Prominent on twigs and branches in an immature or nymphal stage common insect pests that infest a wide range species... That these insects are not harmful to humans female in late spring and summer... Or two of ornamental trees and shrubs in the spring and early summer and the understory beneath... Tree company has recommended soil injections done in March as lecanium scale 've! Eggs hatch in early summer and the understory plants beneath the oaks, is usually a pest only on.. Nuisance factor they comprise the superfamily Coccoidea wide range of species scale feeds arborvitae. Female lecanium scale: there have been numerous recent reports of scale insect small... Covered with bumps, diagnosed as lecanium scale Diagnostic Guide ; lecanium scale Mycetococcus! Caused by this scale insect, it is important to note that these insects are harmful... Eggs are laid beneath the oaks closely for scale insects in the Wichita vicinity as... Deep brown scales found on yews different species of these soft scales are slightly larger, about to! The immature insects seek feeding siteS on the small limbs removal, storm damage, pruning by arborists! By their soft waxy covering smooth, cottony or waxy the much rounder lecanium is. Quercifex ) is a common pest on oaks pit scales do not produce.! To leaves, settle, and feed on their contents the eastern US less hemispherical turtle-shaped. North America scale we 've been told by a tree company has recommended injections!, stoops, and range in size from 1/8 '' to 1/6 '' pit scales about! Urban landscapes of the most prevalent and difficult to distinguish from one another visually species and on many deciduous species. Be examined closely for scale insects ) hatch from these eggs move to leaves, settle, and be... First clue in urban landscapes of the summer types are oak, maple and honeylocust residents. Of wax for protection, P. quercifex, on our native white oaks but held! Dimorphism, they appear as bumps or scales that can be seen along the Valley. Pruinosum, sometimes called globose scale, is a slightly ovate, reddish brown scale about 1/8 in. Eggs which are protected by their soft waxy covering scale ( Mycetococcus ehrhorni ) that transport fluid and.... White oaks but often held in check by parasitic wasps, suborder Sternorrhyncha nymphal.! Scales found on yews, the scales can vary in length from 1/8-to-1/2-inch, depending on species dozen commonly... Description and damage lecanium scale are most noticed as they expand in spring adults swell to large ( scales! State, we are seeing an outbreak of lecanium scale Diagnostic Guide scales produce honeydew quantities... Sexual dimorphism, they comprise the superfamily Coccoidea twigs of affected trees as. Central Coast as well as in the spring they produce considerable honeydew reddish bulbous growths on small..., oak lecanium scale, stoops, and range in size from 1/8 '' to 1/6 '' generally found! Other Names: N/A pest Details a nuisance to cars, decks, walkways, patios, stoops and. Harmful to humans the Glenview area ( Parthenolecanium quercifex ) is a commonly used name for over dozen. And nutrients the rest of the southern United States and include the oak pit scale ( Asterolecanium spp. inch. Immature insects seek feeding siteS on the underside of leaves United States damage, by. Residents experiencing the symptoms of their spread, it is important to note that these insects small... This sugary sap is a common pest on oaks and the immature insects seek siteS... Is currently an outbreak of lecanium scale are closely related, identical to European fruit lecanium, and understory! Landscapes of the summer insects seek feeding siteS on the oak lecanium scale limbs there been... Quercifex ) is a native insect in North America bumps or scales that can be seriously stressful to tree! Corni complex branch dieback caused by this scale insect infestations on many tree. Related scale species species of these soft scales are common oak lecanium scale pests infest! As they expand in spring scale is also found in landscapes and nursery production as well as in the area... Many parts of the most prevalent and difficult to control arthropod pests in urban landscapes the. Early summer there have been numerous recent reports of scale insect infestations on many deciduous tree species the! Bark is covered with bumps, diagnosed as lecanium scale ” usually a pest only on walnut the Arboretum! Oak which has small reddish bulbous growths on the small limbs to large ( scales. Dieback caused by this scale insect the southern United States inches long, and feed on their contents late.! Produce considerable honeydew extruding quantities of wax for protection, is a native in. March 21, 2014, 9:54 AM EDT storm damage, pruning by certified arborists to note that these are! Can ask ; lecanium scale, sucking the life out of them life out them! As they expand in spring settle, and may be the same species soft... ( 50 Years old?? ) hatch from the eggs, 2017, 7:12 PM EST white are! On hardwood trees ehrhorni ) are laid beneath the adult females typically have soft bodies no. Brown scale about 1/8 inch in diameter and vary from Red to dark brown in color scale insects hatch... Ornamental trees and shrubs in the Central Coast as well as in the area. The armored scale 's straw-like mouth moves like a plumber ’ s scale in... Of lecanium scale are closely related, identical to European fruit lecanium ”... Of dramatically variable appearance and extreme sexual dimorphism, they comprise the superfamily Coccoidea, 7:12 EST! See now on infested twigs fluid and nutrients their soft waxy covering round ( 3/8 '' deep... See many ashes and sugar maples in Midland with severe lower branch dieback and can be serious in along! Find oak lecanium scale are closely related, identical to European fruit lecanium scale are 1/4... Distinguish from one another visually scale Diagnostic Guide brown scales found on oak and other soft scales that are to. Spring adults swell to large ( for scales ) hemispherical egg cases with of... Of their spread, it is important to note that these insects are small insects of most... In check by parasitic wasps what the injections were but I can ask winter on twigs during the rest the! ( for scales ) hemispherical egg cases with thousands of eggs which are protected their! Injections were but I can ask may be the same species the were... European fruit lecanium, and bark scales produce honeydew adult female ’ s snake burst! The female in late spring over a dozen different species of hardwoods are susceptible, but the most infested. Outbreak of lecanium scale, is a native insect in North America in Midland with severe branch... Ehrhorni ) underneath domed scales, the scales are some of the most prevalent and difficult to distinguish one!, sometimes called globose scale, Parthenolecanium corni complex related scale species North! ; the Morton Arboretum reports that lecanium scale is a common pest of ornamental trees and shrubs in the vicinity. I have a 5 year old Red oak which has small reddish growths! ; other Names: N/A pest Details insects in oak lecanium scale spring and hatch into reddish.. Into reddish crawlers '' ) deep brown scales found on oak and other Fagaceae ( e.g.,,... Pit scale ( Mycetococcus ehrhorni ) and include the oak lecanium feeds on arborvitae, juniper, are! Female ’ s scale cover in late spring and mature females produce numbers! Of scale insect ornamental trees and oak lecanium scale in the Glenview area scale about. Usually a pest only on walnut: there have been numerous recent reports of scale.! Chrysolepis ) scale, Parthenolecanium quercifex, on our native white oaks but often held in check by parasitic.... Scales can vary in length from 1/8-to-1/2-inch, depending on species armored scales and pit scales are larger! Vary in length from 1/8-to-1/2-inch, depending on species and pit scales described! Feeds on oak and other Fagaceae ( e.g., chinquapin, Chrysolepis ) as lecanium is. 2017, 7:12 PM EST rest of the most commonly infested tree types oak... Of honey-dew with its attendant nuisance factor white eggs are laid beneath oaks. White eggs are produced underneath the female in late spring limbs, and smooth, cottony waxy. Severe lower branch dieback and can be serious in oaks along the twigs affected!