doublefile viburnum problems

‘Mariesii’ is a doublefile viburnum noted for its distinctively layered horizontal branching. Repeat this application after 10 days to better control the crawlers, adults, and eggs by smothering them. Doublefile Viburnum. Viburnum A large group of deer tolerant useful landscape plants that can be used as a hedge, small tree, and a must for wildlife gardens. I am puzzled as to what is attacking my viburnum. It blooms profusely with white clusters of nonfragrant flowers held in two rows along the branches in May. I don't know whether it is bacterial or fungal, but suspect one of those. tomentosum. Azaleas, camellias, and hollies are the primary hosts for this mite, but it occasionally infests many other species, including viburnums. Gardenality is a gardening-centric site made by gardeners for gardeners with tools that enhance any gardening for the expert to the weekend gardener. Have you had a freeze or frost warning since you planted it? These aphids are gray to dark green and feed in clusters at the tips of the branches, causing leaf curl. It will grow in full sun to partial Zones: 5-8. Powdery Mildew. Its dark green leaves turn burgundy to purplish red in autumn. A 2% horticultural oil (5 tablespoons of horticultural oil per gallon of water) can be sprayed in the early spring before new growth begins to kill overwintering adults and eggs. Contact insecticides should be avoided as much as possible to prevent killing these beneficial insects, which reduce thrips populations. Fall color is red to purple. Prevention & Control: Provide good growing conditions for the viburnum, especially additional water during droughts, good soil drainage, and proper fertilization. Avoid using more toxic insecticides unless the plant is seriously damaged from the scale infestation. Gray mold, rust, downy and powdery mildew, wood rot, Verticillium wilt, leaf spots, … The fungus Plasmopara viburni causes downy mildew on viburnums. 'Newport' Doublefile Viburnum ZONE 5 The showy, snowball-like flower clusters of 'Newport' emerge in late spring over thick, quilted, deep green foliage that turns burgundy in the fall. White lacecap-like flowers produce red berries in summer that mature to black. Rely on it to help bring definition and incredible ornamental features to your yard. Non-fragrant flowers in flat-topped, lacecap-like clusters bloom in profusion along the branches in April or May. In the South, where the sun and summers are hotter, I'd suggest giving … Leaves turn burgundy red to purplish red in fall. Doublefile Viburnum vary in the display of these traits. Brown, dried edges or tips of leaves are usually the result of heat stress, drought or wind dessication. Fruit can cause a mild stomach upset. It is caused by the fungus Armillaria mellea, which is common in landscape and garden settings. Viburnum doublefile may be pruned after flowering. It is the largest doublefile viburnum. This charming Viburnum adapts to most well-drained soils. It also makes a lovely specimen plant due to its colorful display. Over time the leaf tissue collapses, the foliage turns grayish-brown, and the damaged foliage drops. Viburnum plicatum is a dense, upright, multi-stemmed, deciduous shrub that typically matures to 8-15’ tall with a slightly larger spread. Usually, the descriptions included branch decline, plants that looked like they were dying, and early defoliation. Horticultural oil may be sprayed when temperatures are between 40 and 85 °F with no rainfall predicted for 24 hours. In general, most viburnums are relatively pest-free. The pests are spindly-legged, pear-shaped insects little bigger than the head of a pin. A dense, upright, multi-stemmed, deciduous shrub with somewhat horizontal branching that grows 8 to 12 feet high. Doublefile viburnum or Japanese snowball viburnum, Viburnum plicatum var. Common Name: Doublefile Viburnum. Rake up and burn or dispose of infected fallen leaves and apply an additional layer of mulch beneath the shrubs. Prevention & Control: They usually cause little or no appreciable damage. (drench, Natural Guard Insecticidal Soap Concentrate, Spectracide Triazicide Insect Killer for Lawns & Landscapes, Bonide Mancozeb Flowable with Zinc Concentrate, Spectracide Malathion Insect Spray Concentrate, Spectracide Immunox Multi-Purpose Fungicide Concentrate; & RTS, Bonide Eight Insect Control Vegetable, Fruit & Flower Concentrate, Bonide Pyrethrin Garden Insect Spray Concentrate, Bonide Colorado Potato Beetle Beater Concentrate, Bayer BioAdvanced 3-in-1 Insect, Disease & Mite Control Conc. Doublefile viburnum (Viburnum plicatum f. tomentosum) thrives in U.S. Department of Agriculture plant hardiness zones 5 through 8. Drought Drowning and Edema Fungal Disease. Most shrub roots are in the top 3 inches of the soil, so any problem with drainage should be easily discernible. Apply when symptoms first appear and repeat every 10 to 14 days as needed. Viburnum leaf beetle has been known in some eastern states since the early 1990’s. Morphology: As a deciduous shrub, doublefile viburnum has opposite, simple leaves which are ovate, serrate and 2”-4” long. Clemson University Cooperative Extension Service offers its programs to people of all ages, regardless of race, color, gender, religion, national origin, disability, political beliefs, sexual orientation, gender identity, marital or family status and is an equal opportunity employer. Foliage may turn fall colors depending on your area and produce ornamental berries … Prune back adjacent shrubs or overhanging tree limbs. Along with the foliar applications, also treat the surface of the soil or mulch immediately beneath the plants (as a spray, not a drench) because this is where the adults will hide during the day. Defoliation may occur if the disease is severe. If they have irregular brown spots that are sunken and dry, they may have a Plant with evergreen shrubs, other viburnums … Since diagnosis by photo is always difficult (one can't see the undersides of the leaves or how broad the damage really is), we recommend you take a sample of the affected branch to the Master Gardener Plant Clinic located at the OSU Extension site, 569 Hanley Road (Highway 238), Central Point. Damage to the foliage begins on the lower leaf surface where feeding begins, but as populations increase, the upper leaf surface is fed upon as well. The Armillaria root rot fungus also forms black, string-like fungal strands about 1/16-inch in diameter or less. Soaps and oils must be sprayed onto the aphids to be effective. Perennials/Ground Covers: Allium (Ornamental Onion): Relative of the onion, useful … To protect pollinators, do not spray once plants are in bloom. The southern red mite is active in the cool weather of spring and fall and overwinters as eggs. The horizontal branching gives a layered appearance. The pleated, green foliage may develop fall color in some regions. Only apply horticultural oils or insecticidal soaps if temperatures are below 85 °F. Both spinosad and acephate are foliar systemic insecticides that may give better control. These fungal leaf ... Algal Leaf Spot. Scientific Name Genus: Viburnum. wide (15 cm), of large, showy, snow-white flowers which extend along the branches and above the foliage in double rows. Ovate, toothed, strongly-veined, dark green leaves (to 4” long) have pleated upper surfaces. You have mentioned some of the things I read: hardiness issues and wilt. I know the average last freeze date for zone 5 is April 15th, but without a location it is difficult to know if the damage is a result if the weather or pest/disease. Thrips are slender, dark-colored insects with fringed wings, and the adults are less than 1/16-inch in length. Doublefile (Viburnum plicatum) A very attractive variety, doublefile produces beautiful large white clusters of lace cap flowers in spring. Mariesii Doublefile Viburnum - 3 Gallon Pot A superior Viburnum selection, 'Mariesii' forms a full to the ground, 6-8 feet tall and 8-10 feet wide dome shaped mound that becomes literally covered with very pretty white flowers arranged in lacecap clusters in late spring and early summer. Spots may begin small but enlarge or merge and may be reddish to grayish brown. Viburnum plicatum species is native to Japan, China. Follow all directions, precautions and restrictions that are listed. Developing leaves may be deformed by severe infections. No serious insect of disease problems. Joey Williamson, PhD, HGIC Horticulture Extension Agent, Clemson University. Because of their small size, thrips are difficult to detect before damage is obvious. The spots enlarge to form angular patches between the leaf veins. They are dark green above, very wrinkled and pubescent beneath. Mariesii doublefile is a very beautiful shrub, much appreciated in our gardens for its appealing blooming. With a light infestation, their feeding causes leaves to have silvery speckles or streaks. It is at the ends of the branches, but not all the branches. It is not generally a sign of disease or fungal infestation. In the fall, the doublefile stalk turns either a light red or deep maroon and leaves turn dark green. If higher toxicity insecticides are deemed necessary, sprays containing acephate, bifenthrin, cyfluthrin, cyhalothrin, malathion, neem oil, permethrin, or pyrethrin will control aphids. Spray when thrips are present and again in 7 to 10 days. Adaptable to a wide range of soils but prefers a well-drained soil with medium moisture. Oval leaf shape, 2-4” long, 1-2” wide, with a pointed tip, rounded leaf base, and serrated leaf edge. It will grow in full sun to partial Viburnum plicatum Mariesii facts. I wouldn't call it instructions. Below are some of the major problems affecting Viburnums. They can cause twisting and curling of the young growth. Both the lower and upper leaf surfaces must be sprayed for good control. Fall foliage color is a reddish-purple. Prevention & Control: Algal leaf spots are common on several ornamental shrubs and trees, including camellias, magnolias, azaleas, aucubas, gardenias, and rhododendrons. I wish I had noted the article sources. 5 pictures total. You planted your Viburnum in mid April, correct? Exposure: Partial to full sun. Viburnum plicatum var. Powdery mildew is worse on plants in the shade. This variety also sports beautiful horizontal branching that will be shown off in winter and early spring. It grows well in sun to part shade and is adaptable to soil types. These sporangia are spread to adjacent foliage by wind and splashing rain. Are you certaain your drainage under this particular shrub is adequate? On the lower leaf surfaces, downy grayish-white fungal growth appears. Doublefile Viburnum is a shrub from Asia which grows to 10 feet and as wide. Viburnum Wabi-Sabi - Common name:Doublefile Viburnum - Its low-growing horizontal habit makes an ideal edger or a lovely accent cascading over a rock wall. Common Name: Doublefile Viburnum. NOTE: Although sulfur is sometimes used for powdery mildew control, it is not recommended for sulfur-sensitive plants, such as viburnums. Root and crown feeding by the grubs may kill the shrub. Very adaptable, grows 6 to 8 ft. in height. Prune out and dispose of any heavily infested branches. Armillaria root rot is also known as shoestring root rot, mushroom root rot, and oak root rot. The fungus is mostly found on the upper leaf surface but also may be found on the lower leaf surface. Water movement is stopped beyond that point and results in a rapid wilting or browning of foliage. Noteworthy Characteristics. Copyright © 2021 Clemson UniversityClemson Cooperative Extension | 103 Barre Hall Clemson, SC 29634864-986-4310 | 1-888-656-9988 (SC residents only) | Contact [email protected], College of Agriculture, Forestry and Life Sciences, Centipedegrass Yearly Maintenance Program, Bonide Systemic Insect Control Concentrate, Bonide Fung-onil Multi-purpose Fungicide Concentrate, Bayer BioAdvanced 24 Hour Lawn Insect Killer RTS, Gordon’s Zylam Liquid Systemic Insecticide (drench, Bonide All Seasons Spray Oil Concentrate; & RTS, Bayer BioAdvanced Garden 12 month Tree & Shrub Insect Control Landscape Formula Conc. Two or three applications may be required at 7- to 14-day intervals. Adaptable to a wide range of soils but prefers a well-drained soil with medium moisture. The oystershell scale can overwinter as full-grown females that are attached to the bark or as eggs that are beneath the adult scale covering. It can also be caused by aphids and we do note  some leaf rolling in your photo. These strands may often be seen between the bark and the wood, or on the surface of the roots, or in the nearby soil. Doublefile Viburnum (Viburnum plicatum var. My observation of this viburnum is that they don't sucker very much any distance from the main plant. Doublefile Viburnum Viburnum plicatum var. Monitor the crawler emergence in the spring with sticky cards, double-faced tape wrapped around a branch, or by putting an infested shoot or leaf into a baggie and watching for crawler movement. Prevention & Control: For successful control, treatments should be directed at the adult weevils. How to Propagate Japanese Snowball Our favorite is Doublefile Viburnum because the large flowers look like lace-cap hydrangeas or ballerinas in flight and their branches and leaves create a graceful horizontal pattern. For a plant to be recognized as a species, it must capable of reproducing by seed. The adult weevil is a black, wingless weevil about ⅜-inch long. All recommendations are for South Carolina conditions and may not apply to other areas. Monterey Once A Year Insect Control II (drench2). Any suggestions? Prune any branches with cankers back to green, healthy wood. Branches with cankers may fail to leaf out in the spring and die. You want to … Do not use overhead irrigation. These miticides should be applied when mites are present and again in 7 to 10 days. Ovate, toothed, strongly-veined, dark green leaves (to 4” long) have pleated upper surfaces. Shade will affect the growth rate. Prevention & Control: As with other foliar diseases, downy mildew occurrence and severity may be reduced by keeping the foliage as dry as possible. Disinfect the pruners between every cut with a 70% alcohol or 10% bleach solution. ... Common Problems. Downy mildew disease is different from powdery mildew in that the fungal growth is observed on the lower rather than on the upper leaf surface. Snowball bush viburnum is a popular and easy-to-grow landscape plant native to Europe and Asia. Emerges in early spring. tomentosum - Doublefile Viburnum (Adoxaceae)Viburnum plicatum var. Viburnum species may become diseased with powdery mildew caused by the fungus Erysiphe viburni. Prune overhanging trees around diseased shrubs to reduce humidity levels and speed the drying of foliage. A perfect fit at the feet of larger shrubs. tomentosum) are backwards. These crawlers are pale, smaller than a pinhead, and are the only mobile stage of the scale life cycle. Doublefile and snowball are considered large shrubs. Flower thrips (Frankliniella species)are pests of both viburnum leaves and flowers. Doublefile Viburnum Viburnum plicatum var. Find where this species is invasive in the United … I had a neighbor who would spend hours in his driveway staring through my kitchen windows. Maybe you have a friend or neighbor who would like some free, you dig, Doublefile Viburnum. Size: Doublefile viburnums are … Water it regularly, especially the first year. tomentosum Leaves: Deciduous. They are ten feet tall and ten feet wide. Thrips are typically found on leaves and between flower petals, where both adults and nymphs (immature insect stage that resembles the adult but smaller) feed by scraping surface cells to suck plant sap. Dig down carefully to see how deep the water is penetrating, especially at the drip line, or if there is standing water in the soil. Double file viburnum PropagationTake greenwood cuttings in summer. 07406. It can reach heights of 8-12 feet ... Common Viburnum Problems. Mariesii is a butterfly and hummingbird magnet. To prevent foliar injury, apply 2% horticultural oils for powdery mildew control only if temperatures are below 85 °F and when no rainfall is forecast for the next 24 hours. Marie's Doublefile Viburnum (Viburnum plicatum f. tomentosum 'Mariesii'): Marie's doublefile viburnum is a broad shrub with a distinct horizontal branching habit that gives it a layered look. Prevention & Control: Several naturally occurring enemies feed on thrips. Downy Mildew. Hand remove spotted leaves on lightly diseased plants. This pathogen will overwinter in leaf spots. Comment About Problems Regarding insects, pest or disease, I haven't had any problems with my Summer Snowflake Viburnum. The unhealthy foliage may become more sparse over a period of several years. Comment About Problems Regarding insects, pest or disease, I haven't had any problems with my Summer Snowflake Viburnum. Occasionally, disease or insect pest problems do occur, and usually, during those times, the plants are under stress or growing in less than ideal conditions. Identification Notes. Burn or dispose of all prunings, as this plant material is a potential source of disease for viburnums, as well as other woody shrubs. The disease typically appears in the summer and reaches its peak in late summer. A multi-season beauty, Viburnum plicatum f. tomentosum 'Summer Snowflake' (Doublefile Viburnum) is a dense, multi-stemmed, deciduous shrub or upright habit without equal when it comes to flowering. ... Additional pests and problems that may affect this plant: Borers Additional Notes. As has been stated by others here (as well as on numerous forum entries), the plethora of lacecap white or pink blooms marching in pairs down the stems and the iridescent fruit display when an adequate cross-pollinator is provided is difficult to match by most woody shrubs. Marie's Doublefile Viburnum (Viburnum plicatum f. tomentosum 'Mariesii'): Marie's doublefile viburnum is a broad shrub with a distinct horizontal branching habit that gives it a layered look. Mulch shrubs with a 2- to 4-inch layer of bark, pine needles, or ground leaves, and avoid piling the mulch against the trunk. Infections of the foliage in the spring can result from splashing spores produced by the diseased foliage remaining on the ground from the previous year. Upon entry via a wound, the fungus kills cambium and sapwood tissue, causing sunken dead areas called cankers. Once foliar damage is observed, insecticidal sprays should be made at 2- to 3-week intervals, where three sprays are usually sufficient. I have cut off a major affected branch but it has not helped. Tolerates almost any soil that is moderately fertile and moist, but well-drained. The disease anthracnose (caused by Colletotrichum species) appears as black, sunken lesions. The adults are nocturnal feeders and move up onto the plant at sundown. Downy mildew may most commonly occur on Viburnum ‘Awabuki’. Armillaria root rot can be distinguished from other root rots, from drought, or excess moisture injury, by examining the crown (lower trunk) and upper roots of the plant. Plant growth may become stunted, and the foliage may become pale green or yellow. )Andrej Kunca, National Forest Centre – Slovakia, Bugwood.org. Doublefile viburnums (Viburnum plicatum tomentosum) are one of the best viburnums to plant in a home landscape. If this is the first year you’re growing a viburnum or you moved and found a viburnum in the new landscape, it may be that the bush is simply spent already. plicatum, produces 2 to 3 inch wide showy, snowball-type clusters of white flowers in spring. Family Name: Adoxaceae. It is not generally a sign of disease or fungal infestation. Low maintenance, this plant has no serious insect or disease problems; Prune as required immediately after flowering. It is also a good plant for a border of shrubs or as a screen. Bark/Twigs: Older branches are dark gray or brownish gray-brown in color.… It is a broad, dense, multi-stemmed, deciduous shrub that typically matures to 10-12’ tall and spreads to 15’ wide. Additionally, some cultivars, such as Viburnum burkwoodii ‘Mohawk’ and V. carlecephalum ‘Cayuga’, exhibit some resistance to powdery mildew. Varieties or Cultivars There was even mention of some disease. The infected areas redden and then turn brown as the leaf tissue dies. Any thrips present will move around on the paper. In late spring, it is almost entirely covered with flat-topped, lacecap-like clusters, 4 in. Merit 2 Granular These steps will improve air circulation around the plants and aid in the drying of foliage. Doublefile viburnum is truly one of the most beautiful species of viburnums, especially where it can be grown well. If insecticides are going to be used, spray when crawlers are observed, as this is the only stage in the life cycle that is controlled by contact insecticides. Expert Response Doublefile viburnum is a beautiful plant when in bloom and we understand your concern about the browning of the leaves. The white flowers in spring are showy cymes followed by red to black fruit the birds love. Both sturdy and elegant, they have few insect problems and tolerate salt spray. Avoid overhead irrigation and improve air circulation with adequate plant spacing and selective branch pruning. Mariesii Doublefile Viburnum - 3 Gallon Pot; A superior Viburnum selection, 'Mariesii' forms a full to the ground, 6-8 feet tall and 8-10 feet wide dome shaped mound that becomes literally covered with very pretty white flowers arranged in lacecap clusters in late spring and early summer. Mariesii doublefile is a very beautiful shrub, much appreciated in our gardens for its appealing blooming. They boast showy blossoms, berries and interesting leaves. Doublefile Viburnum (Viburnum plicatum var. A soil drench around the base of the shrub with imidacloprid or dinotefuran can be used to control the adult weevils when they feed on the foliage (see Table 1 for specific products). In the South, where the sun and summers are hotter, I'd suggest giving … Viburnum plicatum is a dense, upright, multi-stemmed, deciduous shrub that typically matures to 8-15’ tall with a slightly larger spread. Viburnums can be sprayed with insecticidal soap or horticultural oil to control aphids. Point is, I already planted it. Thrips feed on expanding leaves, which creates purplish-red spots on the undersurfaces and causes foliage to severely curl or roll, then drop prematurely. On sunny days, they are found in the leaf litter beneath the viburnum canopy. Take a close look at your browning viburnum leaves. Doublefile viburnums (Viburnum plicatum tomentosum) are one of the best viburnums to plant in a home landscape. Annual pruning should take place after the blooms fade. They can put the leaves under a microscope to check for possible insect damage and may be able to reassure you that our current weather conditions might be causing the damage, which will  not carry over into next year's leaf-out. This fungus can rot the roots of many different kinds of plants. ‘Mariesii’ is a doublefile viburnum noted for its distinctively layered horizontal branching. If this document didn’t answer your questions, please contact HGIC at [email protected] or 1-888-656-9988. Noteworthy Characteristics. As the vast majority of viburnum species are self-sterile - will not produce berries without a pollination partner (a different clone of the same species or one that is very closely related) - it would be hard to imagine how doublefiles would be considered invasive. It is a relatively new pest to the Chicago region. Affected plant tissues develop a powdery white to light gray growth of fungal mycelia. Prevention & Control: Many foliar problems can be prevented by keeping leaves as dry as possible. Insecticidal soap or horticultural oil are the least toxic spray alternatives to protect beneficial insects, people, and the environment, and they can provide control when applied before population numbers get too high. The broadly rounded form on this medium-sized deciduous shrub supports tiered horizontal branches that display the magnificent, large, white, lacecap flower clusters, creating a stunning show in spring. If it becomes essential to spray an insecticide, the following are available in homeowner-size packaging: spinosad, acephate, bifenthrin, cyfluthrin, lambda cyhalothrin, or permethrin. Doublefile Viburnum. Insecticides and Fungicides for Viburnum Insect Pest and Disease Control, Bonide Annual Tree & Shrub Insect Control w/ Systemaxx When the spots become reddish-brown, they are producing their reproductive structures called sporangia. So when I found Wabi-Sabi® dwarf doublefile viburnum (Viburnum plicatum f. tomentosum ‘SMVPTFD’, Zones 5-8), I knew I could have all the wonderful qualities of this plant without giving up a ton of space. across (10 cm), packed with large, showy, snow-white flowers. Botryosphaeria Dieback & Canker. Armillaria root rot (Armillaria spp. Monitor the plants for disease problems, practice good sanitation as stated with fungal leaf spot control, and treat any other landscape plants in the area that have algal leaf spots. See Table 1 for specific products. Repeat spray three times at 5- to 7-day intervals. I Googled up Doublefile Viburnum last week and saw a recommendation for removing older branches from the center of the plant. Non-fragrant flowers in flat-topped, lacecap-like clusters bloom in profusion along the branches in April or May. Most often, this disease is found on trees and shrubs, such as oak, pine, rhododendron, and dogwood, but hundreds of plant species, including viburnums, are susceptible. Although most viburnums are not seriously troubled by diseases or pests, several problems can occur, ... Doublefile Viburnum (V. plicatum f. tomentosum): Doublefile viburnum is one of the most attractive viburnums, with a spreading, horizontal branching form. Makes a good hedge, grouping or filler in a shrub border. Martin’s Dominion Tree & Shrub Insecticide (drench) If fungicides are necessary, sprays should adequately cover both the upper and lower leaf surfaces. Another possible culprit is waterlogged soil. You'll love it all year-long! Prune as needed after flowering. If Armillaria is responsible for the plant’s decline, white felt-like fungal growth can be seen under the bark if the bark is carefully peeled back. They are found in the soil around the viburnum roots. Prevention & Control: Spider mites can be removed with strong sprays of water if applied on a regular basis. Snowball aphids (Neoceruraphis viburnicola) most often occur on European cranberry bush and snowball viburnums. Bloom Time: April to May Alternatively, a soil application of a product containing dinotefuran may be applied around the plant in spring for scale control on viburnums. Root weevil larvae cause damage by chewing and girdling roots, and damage usually begins in spring to early summer and continues through the growing season. Does well in full sun to part shade. These fungal leaf spots on viburnum typically are angular to irregular-shaped, and the leaf tissue in the spots is sunken and dry. Doublefile viburnum is a beautiful plant when in bloom and we understand your concern about the browning of the leaves. But there are lots of other cultivars to choose from including Viburnum prunifolium which has edible raisin-like berries, and Cranberrybush Viburnum whose berries taste like cranberries. Avoid replanting the same species as the one removed. If chemical control is needed, most fungal leaf spots and anthracnose can be controlled with fungicides containing chlorothalonil, thiophanate-methyl, myclobutanil, or mancozeb. References will tell you that viburnums have relatively few pests, but some viburnums may have problems in parts of the country with the viburnum beetle. We like saying the name too! It blooms profusely with white clusters of nonfragrant flowers held in two rows along the branches in May. The doublefile viburnum (Viburnum plicatum tomentosum) is a large, 8- to 12-foot shrub hardy in Sunset's Climate Zones 1 to 9, 14 to 24 and 31 to 43. Initially, this disease appears as light green spots on the upper leaf surfaces. It looks especially nice in a woodland garden. To sample for thrips on viburnum foliage, hold a sheet of stiff white paper under injured leaves, and then shake or tap the branch. Scientific Name Genus: Viburnum. Insecticidal soaps will help control thrips, but thorough coverage is necessary. Prevention & Control: Light infestations of scale can be scraped off by hand. Use pesticides only according to the directions on the label. Leaf spots and anthracnose are fairly common on viburnum foliage, but these foliar diseases are not usually serious. Prune the shrub once a year after it's done flowering to control its height. With severe infestations, leaves and flowers are stunted and distorted and may turn brown and die. When they feed on flower buds, the flower may die without opening. Rake up and destroy infected fallen leaves, and then apply a fresh layer of mulch beneath plants. A variety of leaf spots are caused by the fungi Cercospora species, Phoma species, and Phyllosticta species. If the infestation is severe enough, they may kill the shrub. Description Doublefile viburnum is a striking spring blooming shrub featuring lacecap type white flower clusters in mid spring and blue-black berries in the fall. Brown, dried edges or tips of leaves are usually the result of heat stress, drought or wind dessication. Mature plants grow about 8-12’ tall and wide. Fungicides labeled to control downy mildew include mancozeb or chlorothalonil (see Table 1 for specific products).

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