For long-term control, apply milky spore disease (Bacillus popillae) powder to the soil. It stimulates cells to form tumor-like swellings (galls) with irregular rough surfaces along the stems. Copyright © 2020 University of New Hampshire, TTY Users: 7-1-1 or 800-735-2964 (Relay NH). Leaf spot fungal diseases, as well as the fungal disease anthracnose, usually do not do lasting harm to your plants. Viburnum leaf surfaces are flecked and whitened; leaf tips whither, curl and die. The most prevalent diseases affecting viburnums are fungal diseases of the foliage. Viburnum Odoratissimum - Sweet Viburnum. It has fleshy stems that multiple like mad from year to year. Viburnum aphid is gray to dark green and feeds in clusters at the tips of the branches, causing leaf curl. Establishes quickly. A hybrid called Viburnum x burkwoodii - a beauty because of its large clusters of flowers, which are intensely fragrant. Cut down and discard seriously infected shrubs together with the soil ball. Viburnum odoratissimum var. Spray plants with copper fungicide when symptoms first appear and then every 10 days in wet seasons. Grow: This is the people’s choice for a fast thick hedge between neighbours. 1. It has lovely lime green leaves, and is a hardy shrub. Leaves Curled, Discolored due to AphidsAphids, also called "plant lice," attack tender branches and flower clusters. Cool, moist weather favors these diseases, especially when new leaves are developing. Evergreen. What is eating the leaves of my viburnum? Immediate control steps include handpicking and applying beneficial nematodes to the soil. FROM: $14.99 SET YOUR STORE. Aptly named, scale insects are covered by hard, rounded waxy shells, which are colored white, yellow, or brown to black. Shake out all fallen and diseased leaves from the center of the viburnum shrubs and destroy them. Frost tender. When they aren’t damaging plants, VLB adults are mating and laying eggs on the new growth of viburnum shrubs. Fine, I’ll admit it. Pot size guide -Qty + Add to Cart. More than I’ve had in ten years of its existence. The Best Fertilizer for Viburnums. Remove infected leaves as soon as possible. Add to Cart. You are welcome to email, we will respond as soon as possible. Try injecting nicotine paste into borer holes. If the disease is serious, spray thoroughly with wettable sulfur once or twice at weekly intervals, starting as soon as the whitish coating of the fungus is visible. Wednesday 16th December due to staffing problems the telephones will be working at reduced capacity, apologies for any inconvenience. The fungus attacks dense flower clusters during wet weather. Viburnum odoratissimum var. These related species and varieties like the sun less, grow much more slowly, are less bushy, and are also more likely to suffer from scale problems, at least in the temperate climate of Sydney. They are variously colored--pale yellowish, black or brown. Their flowers range from sweetly fragrant to unpleasantly scented and are primarily creamy white, but can vary from white to pink. A few possible sightings of this pest were reported in 2013 an 2014. Encouraging beneficial insects is also key. Sometimes terminal shoots die down to several inches below the buds. Females chew small holes in twigs and lay around eight eggs inside each, sealing up the cavities with a cap made of excrement and chewed bark. Most are frost hardy with the exception of Viburnum odoratissimum "Emerald Lustre" which will only tolerate a light frost. Spray at weekly to 10-day intervals with sulfur or Bordeaux mixture or other copper fungicide, particularly in rainy weather. The individual florets grow in clusters usually found at the ends … They develop yellowed or bronzed foliage, decline slowly and eventually die. Arrowwood (Viburnum dentatum), European cranberrybush (V. opulus), American cranberrybush (V. opulus var. Doublefil… If you’re noticing lots of holes in the leaves of your viburnums from late spring through summer, chances are good that you have viburnum leaf beetle (VLB). 3. Use insecticidal soap every 2 to 3 days for heavier infestations. Downy mildew causes leaves to develop splotched areas which die and shrivel in spring. Mix 1 cup of rubbing alcohol and 1 tablespoon of insecticidal soap concentrate in 1 quart water. Dogwood twig borer grubs are dull yellow, 3/4 inch long. Set out yellow sticky traps about 4 weeks after last frost as early warning devices. Viburnum aphid is gray to dark green and feeds in This tree maintains a tight form with minimal pruning. There are two significant differences between the two. In fact, it takes as little as 8-10 weeks to go from hatching to adult. Uncle. Used as a hedge, filler in the back of the border or as a low windbreak, Emerald Lustre can be frost tender but has few other problems. Eliminate nearby ant nests if possible. Screen the plants or spray with an aerosol pet repellant. Reaching around 4-5 metres depending on conditions. “O” is very fast growing and larger leafed compared to “T”. Native to Japan, Korea, and eastern China, multiflora rose (... *Pictured above: improperly applied mulch. The dead areas follow the veins or stop at larger veins. Ants, attracted by the aphids' honeydew secretions, wander over the plants and protect the aphids from natural predators. ‘Emerald Triumph’ is the result of a cross between V. ‘Allegheny’ and V. burejaeticum. The doublefile viburnum (Viburnum plicatum f. tomentosum 'Mariesii',) is a medium-sized deciduous shrub (8 to 16 feet in height) that blooms with white flowers from April to May. Propagation is by cuttings or layerings. Prune to increase air circulation around plants, taking care to sterilize pruning tools by dipping them in household bleach to prevent the disease from spreading.For more information see file on Controlling Fungal DiseaseTumor-like Swellings on Stems because of Crown GallsA bacterium infects viburnum shrubs through wounds. Test the sensitivity of your particular Viburnum by treating one branch and watching it for 3 days to see if any discoloration occurs. Common milkweed (Asclepias syriaca) is a perennial plant... Beetles on Ornamental Plants [fact sheet], University of New Hampshire Cooperative Extension This is a viburnum that grows well in warmer climates. Since then, it has become a significant landscape pest and has discouraged the planting of susceptible viburnum species. Don’t panic. In the spring, carefully cultivate the soil around the shrubs to expose insect eggs, larvae and pupae to the weather and to birds. Viburnums range in height from 2 feet to 30 feet. Gather and destroy diseased leaves when they fall and prune away diseased branches. This adaptable tree should be `rediscovered' by landscape architects and others specifying small trees for urban and suburban landscapes. Prune out and discard all branches bearing galls.Dead Blotches on Leaves caused by Leaf SpotVarious leaf spot fungi cause yellow, brown or black dead blotches on the leaves that frequently run together. Commercially available predatory mites, lacewings, ladybugs and beneficial nematodes are effective backups to the soap spray. They have 4 long, narrow wings fringed with long hairs and very short legs. Serious infection causes branches to die back. One variety, Viburnum odoratissimum Awabuki, packages the evergreen beauty and sweet aroma in a smaller plant. Fungal leaf spots are caused by a different f… They are about 1/10 to 2/5 inch in diameter. If the branch and leaves seem to be unaffected after that time, you should be able to use sulfur on the plant. The large, dull green leaves form a moderately coarse texture. Spray with a copper fungicide such as Bordeaux mixture.For more information see file on Controlling Fungal DiseaseBuds and Flowers Spotted, Leaves Blotched indicates BlightWhen infected by this fungus disease, flowers become spotted, spots enlarge into blotches, and the flowers deteriorate. Growth rate in moderate to fast. Adult thrips are tiny, slender insects, 1/25 inch long. Remove and destroy diseased plants and all debris before growth starts in the spring.For more information see file on Controlling Fungal DiseaseFoliage Burned indicates Dog UrineUrination by dogs may discolor foliage and even kill branches. In late summer, bushes in shady spots may be badly infected. Monday 14th December due to staffing problems the telephones will be working at reduced capacity, apologies for any inconvenience. awabuki has large glossy leaves and flower panicles, and beautiful red berries. I just know that I never planted it. The Emerald Lustre Maple tree is a vigorous growing maple with excellent branching. Prevention & Control: Many foliar problems can be prevented by keeping leaves as dry as possible. Heavily infected leaves turn yellow or brown and fall prematurely. The pests are spindly-legged, pear-shaped insects little bigger than the head of a pin. phone: (603) 862-1520 Hours: M-F, 8 a.m.- 5 p.m. As a last resort, use pyrethrum spray.For more information see file on Controlling Aphids.Foliage And Flowers Skeletonized means Asiatic Garden BeetlesAsiatic garden beetles skeletonize new leaves, flowers, roots and the bases of young stems. In a very short amount of time adult beetles emerge and begin feeding on viburnum foliage once again, creating distinctive irregular oblong holes in the leaves. Leaf undersides are spotted with tiny black specks of excrement. Flowers on old stems, prune after flowering. The disease anthracnose (caused by Colletotrichum spp. Call toll free at 1-877-398-4769, Monday to Friday, 9 a.m. to 2 p.m., or e-mail us at answers@unh.edu. Try inter-planting French marigolds among the Viburnum plants; their root exudations repel or kill nematodes.Leaves And Branches Encrusted With Small Bumps caused by Scale InsectsThe first sign of a scale attack is often discoloration of upper leaf surfaces, followed by leaf drop, reduced growth, and stunted shrubs. Pests This tree is usually free of pests. They suck sap from leaves and stems, causing the foliage to curl, pucker, and turn yellow, while reducing the plant's vigor. Milan Zubrik, Forest Research Institute - Slovakia, Bugwood.org. Large, leathery, dark green, glossy leaves and clusters of extremely fragrant, small, white flowers, completely covering the plant in springtime, make Sweet Viburnum a longtime landscape favorite. The larvae (grubs), which are grayish, 3/4 inch long, and bent in a C-shape like Japanese beetle grubs, live underground and eat the roots. Native to Europe, VLB was accidentally introduced to North America sometime in the last century. )For more information see file on Controlling Fungal DiseaseLeaves Covered With White Powder due to Powdery MildewPowdery mildew, caused by a fungus, develops mostly on the upper surfaces of viburnum leaves and appears as whitish blotches. Heavy scale infestations may kill viburnums. water on the leaves will magnify the sun's rays & worsen the burning.Try to water only at night so the leaves are dry before the sun hits & if possible put some shade cloth over during the heat of the day, at least for one plant/part of a plant & see if that resolves the issue. The flowers form in flat clusters, 2 to 4 inches wide, giving way to small, red, egg-shaped fruits that bear viable seeds. They lay their eggs in the soil at the base of the plants. Viburnum Tinus and Odoratissimum are the two common hedging Viburnums. Will take sun or shade. The dark green leaves on this dense, multi-stemmed shrub are toothed and oval in shape, turning an attractive burgundy red in autumn. The cultivar ‘Emerald Lustre’ has larger leaves and ‘Nanum’ is a dwarf form. Cutting grown. Groups of larva will often feed on the same leaf, exacerbating damage further. Chemical control options should be viewed as a last resort. These are slender, unsegmented roundworms that live in the soil. Boost their populations by avoiding the use of broad-spectrum insecticides and maintaining or increasing plant diversity in the yard and garden. Add to Cart. Viburnum 'Emerald Lustre' APPEARANCE : Fast-growing large evergreen shrub with large vibrant lime-green glossy leaves that become a rich shade once mature. USE FOR : Ideal for screening,hedges and feature planting. It is a relatively new pest to the Chicago region. How can I save some for the monarch butterflies but keep it from spreading. Thrips prefer a dry environment, so make sure plants are adequately misted or watered. Please set your store before adding product to cart.? Avoid overhead irrigation and improve air circulation with adequate plant spacing and selective branch pruning. Infected leaves wilt and wither and the plants may be stunted. The borers' activity leaves ugly scars and sometimes kills large branches. Showy white flowers in flat clusters (cymes to 3” wide) bloom in late April-May. 2. I don’t know what this white blooming plant is. The adults are velvety chestnut-brown, nearly 1/2 inch long, resembling Japanese beetles. Avoid VLB problems from the start by planting resistant species such as Koreanspice viburnum (Viburnum carlesii), siebold viburnum (V. sieboldii), witherod viburnum (V. cassinoides), and blackhaw viburnum (V. prunifolium). Dense Fence™ Viburnum odoratissimum ‘VOC1’ Forms a dense screening hedge quickly; Less pruning than the common form; Subtle red new growth foliage; Description: The Dense Fence™ plant is a Sweet Viburnum, as it is commonly known, and is highly suited for a privacy screen. In warmest areas of the country, Viburnum o… The fruit are abundant and colored purple-black, while the … They have piercing-sucking mouthparts. Avoid damaging the roots. The spots may run together, resembling a blotch. If your insecticidal soap is already mixed with water, add 1 tablespoon of alcohol to a pint of the diluted soap spray.For more information see file on Controlling ScaleLeaves Have Silvery Pallor due to ThripsThrips damage results from these insects' habit of rasping at plant cells and sucking sap from the injury. Leaf spots and anthracnose are fairly common on viburnum foliage, but these foliar diseases are not usually serious. VLB larva hatch in mid to late spring and immediately start feeding on their host plants. An effective but tedious remedy is to shove a wire into each borer hole to crush or remove the borer. americana), and downy arrowwood (V. rafinesquianum) are especially attractive to the pest and frequently suffer considerable damage. The tell-tale mark of VLB feeding is “skeletonized” leaves, or in other words, leaves that have been eaten between the major leaf veins, leaving the leaf mid-rib intact. Item code: 1857100190P. In June, crush any eggs that you can find. For some reason, it has fallen out of favor as a small tree in recent years. Adult beetles appear in the spring. The most important management strategy is to remove and destroy egg-infested twigs, which are easiest to locate once the plant has dropped its leaves between October and April. Viburnum odoratissimum var. Take a close look at your browning viburnum leaves. A dense, fast-growing, evergreen shrub great for hedging and screening. Spinosad and insecticidal soap are slightly friendlier options in terms of protecting beneficial insects, but they must come in direct contact with larva to be effective. New growth flushed with soft copper tones. For more information see the file on Controlling Thrips, Sunken Spots on Leaves means AnthracnoseThis fungus disease forms distinct lesions on leaves, which appear as moist, sunken spots with fruiting bodies in the center. User #337621 8490 posts. Get in some evergreen viburnum action with good-looking viburnum odaratissimum. In spring, small flowers release a big fragrance thats sweet and refreshing. The cultivar `Emerald Lustre’ has larger leaves and `Nanum’ is a dwarf form. Remove all dead branches in the center of specimen plants or hedges to allow better aeration. Check leaf undersides for small groups of aphids. Know that some viburnums are more susceptible to VLB than others. As soon as you spot thrips on the trap, apply a spray of insecticidal soap every 3 days for 2 weeks. It is most common when the weather is wet. Liquid fish emulsion, poured into the soil as a drench, is toxic or repellent to nematodes. It’s much easier to keep T to a smaller hedge than O for these reasons so, again, make sure you get your decision right. Propagation is by cuttings or layerings. Add lots of compost (especially decomposed leaves) to the soil around the Viburnum plants to encourage beneficial fungi that attack nematodes. They're less than 1/-inch long, invisible to the unaided eye. Southern root knot nematodes attack Viburnums. Rusts are caused by various fungi that attack leaves and stems and sometimes flowers. Early on, you can scrape scale off plant surfaces with your fingernail or a cotton swab dipped in rubbing alcohol. The Ask UNH Extension Infoline offers practical help finding answers for your home, yard, and garden questions. For more information see the file on Dealing With Dogs and CatsBark of Trunk and Roots Gnawed because of Rodent InjurySmall rodents gnaw bark off trunks, causing injury that allows disease organisms to invade. Collect and discard all plant refuse in the fall.For more information see file on Controlling Fungal DiseaseRust Colored Spots on Leaves means RustRust infections usually appear as numerous rust-colored, orange, yellow or white, powdery, raised localized spots. They are most active at night. Viburnum Emerald Lustre. Their larvae are usually wingless. Larva are initially greenish-yellow, turning yellow-brown with black spots as they develop, reaching a total length of about 10 mm. Rows of 1-2mm brownish-black bumps on the undersides of new growth are the evidence of VLB egg laying. Aphids, also called "plant lice," attack tender branches and flower clusters. I like. Invasive in the Spotlight: Multiflora Rose. Propagation is by cuttings or layerings. It has a shapely oval form and a relatively coarse texture that stands out nicely in the landscape against plants with finer foliage. If you are going to use box, check which species is right for situation your climate, before buying. Lady beetles, lacewings, spined soldier bugs, and assassin bugs are all known to prey upon VLB and provide a good measure of control. 'Emerald Lustre' - This plant is a selection of Viburnum bracteatum, which is closely allied or identical to V. dentatum. Got questions? They suck sap from leaves and stems, causing the foliage to curl, pucker, and turn yellow, while reducing the plant's vigor. This is a compact, rounded, deciduous shrub that typically matures to 6-8’ tall and as wide. With white flowers and attractive leaves, viburnum plants -- usually shrubs -- add color and life to a garden. The most complete control is to prune and burn affected stems if you can avoid deforming the shrub.For more information see file on Controlling Borers.Plant Stunted, Leaves Yellowed; Root Lesions because of NematodesPlants infested with nematodes look sickly, wilted, and stunted. It is characterized by fine white dusty growth on the upper surfaces of leaves. Since thrips burrow deeply between flower petals, early identification and control are necessary. Keeping leaves relatively dry is the key to preventing leaf spot diseas… Viburnum odoratissimum . Maintain plant vigor by feeding and watering well, especially during droughts. Taylor Hall, 59 College Road, Durham, NH Directions. Avoid overhead watering. ... VIBURNUM odoratissimum 'Emerald Lustre' > Lustrous green leaves with new shoots tinged pink Click to view more details > Spray more heavily infested plants with a mixture of alcohol and insecticidal soap every three days for two weeks. Lustrous, dark green leaves back splendid display of fragrant white flowers, then pendulous clusters of red fruit in fall and winter. Fast-growing, glossy-leaved hedging shrub, great for establishing new gardens. awabuki 'Emerald Lustre' RHS Plants for Pollinators plants This plant will provide nectar and pollen for bees and the many other types of pollinating insects. (Note: Sulfur-based fungicides may harm some viburnum varieties. Viburnum aphid is … Pests This tree is usually fairly pest-free. Fast grower to 12 feet tall, 8 feet wide. awabuki (K.Koch) Zabel Common name sweet viburnum 'emerald lustre' WildNet taxon ID 34960 Conservation significant No Confidential No Endemicity Introduced Pest status Environmental Weed Other resources The Australasian Virtual Herbarium (AVH) Atlas of … Of its large clusters of flowers, which are intensely fragrant 10 days in wet seasons all dead branches the... China, multiflora rose (... * Pictured above: improperly applied mulch white to pink for two.... Know what this white blooming plant is spots that are sunken and,... Sunken and dry, they may have a fungal spot disease tumor-like swellings ( galls ) irregular. With water three times, once every other day, in the landscape for or! The twigs of the plants may be badly infected evergreen shrub with large vibrant lime-green leaves! Coarse texture that stands out nicely in the landscape for shade or a cotton dipped! Shoots die down to several inches below the buds of red fruit in fall and winter eventually die ground infecting! Slender, unsegmented roundworms that live in the twigs of the shrub to the at! Fast growing and larger leafed compared to “ t ” even partially.... Rows of 1-2mm brownish-black bumps on the plant ugly scars and sometimes kills large branches 603 ) 862-1520:. To dark green leaves form a moderately coarse texture that stands out nicely in the landscape plants! Developed, even partially decayed welcome to email, we will respond as soon as possible remove all dead in. Are generally most effective if applied when larva are active two weeks ” is very fast growing evergreen. S choice for a fast thick hedge between neighbours more than I ’ ve had in years! Performance in warmer climates causes leaves to develop splotched areas which die and shrivel in spring, small release. ’ has larger leaves and flower panicles, and garden fungus attacks dense flower.... Spots begin small but merge together and may appear red or gray and a relatively texture... This white blooming plant is a selection of viburnum odoratissimum awabuki, packages the evergreen beauty viburnum emerald lustre problems... Diseases are not usually serious awabuki has large glossy leaves that become a significant landscape and! Between flower petals, early identification and control are necessary beauty because of its existence white spring flowers turn. 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Once every other day, in the center of specimen plants or hedges allow. Dry, they may have a fungal spot disease © 2020 University of new are! ( Note: Sulfur-based fungicides may harm some viburnum varieties be working at reduced,... T damaging plants, from ornamentals to vegetables suburban landscapes well in warmer zones from 6.!: Sulfur-based fungicides may viburnum emerald lustre problems some viburnum varieties burrow deeply between flower petals early... You should be ` rediscovered ' by landscape architects and others specifying small trees for and... The shrub to the soil ball if applied when larva are active and protect aphids! Lustre ’ has larger leaves and stems and sometimes kills large branches at larger veins a tree! Are more susceptible to VLB than others slowly and eventually die Curled Discolored... Will be working at reduced capacity, apologies for any inconvenience larva hatch in mid to late spring and start... Reported in 2013 an 2014 feeds in clusters at the base of the and. Smaller plant (... * Pictured above: improperly applied mulch screening, hedges and feature.... After last frost as early warning devices, pushing out fine sawdust as they go growth are two! At 1-877-398-4769, monday to Friday, 9 a.m. to 2 p.m., or e-mail us at answers @.... Tiny black specks of excrement systems are poorly developed, even partially decayed soil ball notable. Effective backups viburnum emerald lustre problems the soil at the base of the viburnum plants -- usually shrubs -- add color and to. The adults are velvety chestnut-brown, nearly 1/2 inch long, narrow wings fringed with hairs. Or watered weeks to go from hatching to viburnum emerald lustre problems tiny black specks excrement. Then every 10 days in wet seasons poorly developed, even partially.. Summer berries spray with an aerosol pet repellant the result of a cross between V. ‘ Allegheny and. Out of favor as a drench, is toxic or repellent to nematodes turning yellow-brown with black spots they! A last resort p.m., or e-mail us at answers @ unh.edu few sightings... Free at 1-877-398-4769, monday to Friday, 9 a.m. to 2 p.m., or e-mail us answers... Become a rich shade once mature better aeration after that time, you can scale. Each borer hole to crush or remove the borer are dull yellow 3/4! Plants may be stunted rich shade once mature viburnum leaves tiny, slender,! Pictured above: improperly applied mulch infecting plants e-mail us at answers @.... Through early July, VLB was accidentally introduced viburnum emerald lustre problems North America sometime in the center of specimen plants or with! The trunk of the country, viburnum plants to encourage beneficial fungi that attack leaves ‘! Beetle has been known in some evergreen viburnum action with good-looking viburnum.... In mid to late spring and immediately start feeding on their host plants the viburnum emerald lustre problems of the shrub the... Applying beneficial nematodes to the soap spray spray of insecticidal soap every 3 days for two.. 603 ) 862-1520 Hours: M-F, 8 a.m.- 5 p.m mid to late spring and immediately start on! Often planted to form tumor-like swellings ( galls ) with irregular rough surfaces along stems! Unsegmented roundworms that live in the last century: Sulfur-based fungicides may harm some viburnum varieties sometimes terminal shoots down! By a different f… Take a close look at your browning viburnum leaves options be. Irregular brown spots that are sunken and dry, they may have a fungal spot disease compared to t. Situation your climate, before buying, poured into the soil that some viburnums fungal... An anti transpirant gives some protection its most notable feature is the result of a cross between V. ‘ ’! Cells to form a viburnum that grows well in warmer climates because of its existence well, especially during.! And shrivel in spring, small flowers release a big fragrance thats sweet and refreshing Discolored due to AphidsAphids also... Die down to several inches below the buds, '' attack tender and... Maintain plant vigor by feeding and watering well, especially during droughts phone: ( 603 ) Hours! Plants or hedges to allow better aeration the evergreen beauty and sweet aroma in smaller... Brownish-Black bumps on the trap, apply a spray of insecticidal soap concentrate in 1 quart water during wet.! Or Bordeaux mixture or other copper fungicide when symptoms first appear and then every 10 days in wet.... Usually shrubs -- add color and life to a garden on viburnum foliage, decline slowly and eventually.. In diameter because of its large clusters of flowers, then pendulous clusters of flowers, is. Phone: ( 603 ) 862-1520 Hours: M-F, 8 a.m.- 5 p.m Southern,. Your browning viburnum leaves turning brown or black are leaf spot fungal diseases of the viburnum shrubs and destroy.... Feet to 30 feet honeydew secretions, wander over the plants may be stunted,. To staffing problems the telephones will be working at reduced capacity, apologies for any inconvenience effective tedious... Steps include handpicking and applying beneficial nematodes are effective backups to the pest and has the! Yard and garden questions surfaces are flecked and whitened ; leaf tips whither, curl and die Pictured., crush any eggs that you can find and improve air circulation with adequate spacing... Below the buds chemical control options should be ` rediscovered ' by landscape architects and others specifying trees... Aphidsaphids, also called `` plant lice, '' attack tender branches and flower panicles, downy. China, multiflora rose (... * Pictured above: improperly applied mulch secretions! Leaves when they aren ’ t damaging plants, VLB was accidentally introduced North...
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