Parthenolecanium spp. Trees of poor vigor or with branch and crown dieback should be examined closely for scale insects. It is most common on coast live oak. Effective on. DAMAGE. They are round and reddish brown. Kermes scales (Kermes spp.) I have a 5 year old Red Oak which has small reddish bulbous growths on the small limbs. Taxus Lecanium (soft scale). For this reason, they are commonly referred to as the Parthenolecanium corni complex. 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. 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. Soft (Lecanium), kermes, and bark scales produce honeydew. 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. Yew (Taxus) Mid-June to mid-July (immature) Magnolia Scale (Neolecanium cornuparvum) (soft scale): Large female up to 1/2 inch long. Our large oak tree (50 Years old??) Crawlers (immature scale insects) hatch from the eggs. Lecanium scale on Oak tree. Biology. Damage can be serious in oaks along the Central Coast as well as in the Central Valley. Oak lecanium feeds on oak; Fletcher scale feeds on arborvitae, juniper, and yew. What do you recommend? There is currently an outbreak of Lecanium scale insects in the Glenview area. Parthenolecanium quercifex occurs on oak and other Fagaceae (e.g., chinquapin, Chrysolepis). Apparently there is a connection with mosquito spraying. Adult females typically have soft bodies and no limbs, and are concealed underneath domed scales, extruding quantities of wax for protection. Skin is covered with white waxy powder. 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. 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. Parthenolecanium pruinosum, sometimes called globose scale, is usually a pest only on walnut. Soft scales are some of the most prevalent and difficult to control arthropod pests in urban landscapes of the southern United States. The armored scale's straw-like mouth moves like a plumber’s snake to burst plant cells and feed on their contents. The female lays eggs in April and May. Lecanium scales are common insect pests that infest a wide range of species. The crawlers settle down within a week or two. They did not specify what the injections were but I can ask. 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. Lecanium Scale Diagnostic Guide; Lecanium Scale Diagnostic Guide. The adult females are 1 / 16 to ¼ inch (2 to 6 mm) in diameter. My oak tree bark is covered with bumps, diagnosed as lecanium scale, sucking the life out of them. Parthenolecanium spp. Oak lecanium and Fletcher scale are closely related, identical to European fruit lecanium, and may be the same species. in the region. This soft scale insect (Hemiptera: Coccidae) is primarily a pest on oak but has also been recorded on other species including hickory (Carya spp.) The crawlers also suck sap from leaves. Tree trimming, tree and stump removal, storm damage, pruning by certified arborists. and Ehrhorn's oak scale (Mycetococcus ehrhorni). and lecanium scales (Eulecanium spp.) 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. They are more or less hemispherical or turtle-shaped, brown, and range in size from 1/8" to 1/6". The oak lecanium scale, Parthenolecanium quercifex, is a common pest of ornamental trees and shrubs in the eastern US. “Lecanium scale” is a commonly used name for over a dozen different commonly related scale species. The European fruit lecanium scale is a slightly ovate, reddish brown scale about 1/8 inch in diameter as a mature female. As females swell in the spring they produce considerable honeydew. Howdy! This is the stage you will see now on infested twigs. The first clue in urban areas is sticky droplets on cars parked under infested trees. Males have wings and are brown. Lecanium scale is a sucking insect that exhausts the oak tree of precious food reserves by piercing the leaves, extracting sugars, and excreting “honeydew”. Fletcher scale, This sugary sap is a nuisance to cars, decks, walkways, patios, stoops, and the understory plants beneath the oaks. Free estimates & same-week service. Oak pit scale nymphs. Pest description and damage Lecanium scale are most noticed as they expand in spring. Kermes Oak Scale. are soft scales. European fruit lecanium, Parthenolecanium corni, is a native species and on many different woody plant hosts. Asked March 21, 2014, 9:54 AM EDT. Scale insects are small insects of the order Hemiptera, suborder Sternorrhyncha. Frosted scale. 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. Lecanium scales are most prominent on twigs during the spring and early summer. The female lecanium scale are about 0.13 inch in diameter and vary from red to dark brown in color. This soft scale insect (Hemiptera: Coccidae) is primarily a pest on oak but has also been recorded on other species including … There are many types of scale insects. In many parts of the state, we are seeing an outbreak of Lecanium scale on hardwood trees. Lecanium Scales; The Morton Arboretum reports that lecanium scale crawlers have emerged on willow. Return to Top. In spring adults swell to large (for scales) hemispherical egg cases with thousands of eggs. Return to Top. 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.) Armored scales and pit scales do not produce honeydew. The oak lecanium scale, Parthenolecanium quercifex, is a common pest of ornamental trees and shrubs in the eastern US. Crawlers that hatch from these eggs move to leaves, settle, and feed on sap during the rest of the summer. Lecanium spp. Eggs are produced underneath the female in late spring. 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) has lecanium scale we've been told by a tree company. Pit scales are about 1/4 to 1/2 inches in diameter and include the oak pit scale (Asterolecanium spp.) 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. Lecanium scales spend the winter on twigs and branches in an immature or nymphal stage. The much rounder lecanium scale is also found in landscapes and nursery production. White eggs are laid beneath the adult female’s scale cover in late spring and hatch into reddish crawlers. One can find oak lecanium, P. quercifex, on our native white oaks but often held in check by parasitic wasps. and birch (Betula spp). Lecanium scale. Development resumes in the spring and mature females produce large numbers of eggs which are protected by their soft waxy covering. Soft scales are slightly larger, about 1/4 inches long, and smooth, cottony or waxy. Common Name: Oak lecanium; Other Names: N/A Pest Details. 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. Of dramatically variable appearance and extreme sexual dimorphism, they comprise the superfamily Coccoidea. Many species of hardwoods are susceptible, but the most commonly infested tree types are oak, maple and honeylocust. Military & senior discounts. Oak lecanium scale (Parthenolecanium quercifex) is a common pest on oaks. Typically, they appear as bumps or scales that can be seen along the twigs of affected trees. The look-alike European fruit lecanium is generally not found on oak. Conifers get soft scale too. However, these scales also cause significant lower branch dieback and can be seriously stressful to the tree. Asked March 3, 2017, 7:12 PM EST. We see many ashes and sugar maples in Midland with severe lower branch dieback caused by this scale insect. These scales feed directly on plant parts that transport fluid and nutrients. Like the cottony maple scale and other soft scales, the lecanium scales excrete large amounts of honey-dew with its attendant nuisance factor. LECANIUM SCALES on Red Oak. 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. 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. Lecanium Scale: There have been numerous recent reports of scale insect infestations on many deciduous tree species in the Wichita vicinity. Lecanium Scale Insect Notice and FAQ . The tree company has recommended soil injections done in March. What is the best treatment? Oak lecanium. With many residents experiencing the symptoms of their spread, it is important to note that these insects are not harmful to humans. The scales can vary in length from 1/8-to-1/2-inch, depending on species. Round (3/8") deep brown scales found on yews. There are approximately one dozen different species of these soft scales that are difficult to distinguish from one another visually. Invariably, the scales are described as “lecanium scale”.