This disease first occurs in the tree’s second year, in late summer. I live in Cologne, MN. Based in the American Southwest, Bridget Kelly has been writing about gardening and real estate since 2005. My internet is very slow and I don't know if the first one went thru. Generally grown as an ornamental tree, the Black Hills spruce also serves as a windbreak or privacy screen in some residential landscapes. The needle loss probably has been caused by a fungal disease. Globe Arborvitae (Thuja occidentalis ‘Woodwardii’): 6 feet tall by 8 feet wide, slow-to-medium growth rate, rounded form, full sun to part shade Please excuse if this is a duplicate email. People also chewed the resin to aid digestion. Can you recommend anyone to spray them? This procedure will need to be repeated for every spring for three years to be effective, according to the University of Minnesota Extension Service. Another fungal disease that is destructive to the Black Hills spruce. To avoid this disease water the tree during periods of drought, mulch around the base and avoid getting water on the needles. She holds a Bachelor of Arts in English with a concentration in creative writing. The Black Hills spruce is a large tree, with one specimen in North Dakota that stands at a height of 95 feet with a 42 foot spread. I estimate about 6 to 7 percent of the needles shed on all the trees. Rhozosphaera needle cast strikes in mid to late summer. It can be identified by yellowing needles that burn brown in late winter. Is this a fungus? https://www.extension.umn.edu/garden/yard-garden/trees-shrubs/spruce-tree-diseases/fungi-associated-... https://www.extension.umn.edu/garden/yard-garden/trees-shrubs/spruce-tree-diseases/rhizosphaera-need... http://files.dnr.state.mn.us/assistance/backyard/treecare/forest_health/whitesprucediagnosis.pdf, http://www.extension.umn.edu/garden/yard-garden/trees-shrubs/how-to-hire-a-professional-arborist/. Black Hills Spruce Diseases Lirula Needle Blight. Is this a fungus? These trees are native to the Black hills of South Dakota, where they are found abundantly, that too at elevations of more than 6000 feet. Trees can be protected from Rhizosphaera needle cast with properly timed fungicide applications. See pics. It is, therefore, advised that you keep the tree healthy with proper watering and other maintenance procedures. Mites, bagworms and sawfly are potential pests. However, we can't determine which by viewing the photos. The Black Hills spruce (Picea glauca) is a variety of white spruce native to South Dakota. A fungal disease, lirula needle blight overwinters on the tree’s needles and becomes progressively... Rhizosphaera Needle Cast. Spray the infected Black Hills spruce tree with a fungicide containing Chlorothalonil, according to package directions, in early spring when new needles are small. The inner bark of the black spruce was a poultice to reduce inflammation, as well as a tea to help with kidney stones, rheumatism, and digestive issues. Rhozosphaera needle cast strikes in mid to late summer. The black hills spruce can be expected to grow in Hardiness Zones 2–6. Needles turn brown and die and the tree secretes white or light blue resin from lesions on the bark, called cankers. Plan the perfect garden with our interactive tool →, North Dakota State University: Black Hills Spruce, University of Minnesota Extension: Diseases of Spruce Trees in Minnesota, University of Nebraska-Lincoln: Cytospora Canker of Spruce. Can you recommend anyone to spray them? View Map. See pics. It is introduced into the tree through wounds, starts on the lower branches and spreads quickly to others. Asked May 22, 2017, 12:38 PM EDT. Trees stressed from drought, poor planting practices or other factors are more likely to suffer from Rhizosphaera needle cast. The needles will fall off the tree one year after it is infected. Disease, pests, and problems. I live in Cologne, MN. Ask an Expert is made up of groups and individual experts. Another fungal disease that is destructive to the Black Hills spruce. It can be identified by yellowing... Cytospora Canker. Growth Rate This tree grows at a slow rate, with height increases of less than 12" per year. Native geographic location and habitat. "Stigmina needle cast" We have long been familiar with Rhizosphaera needle cast, a very common fungal disease that affects primarily Colorado blue spruce, and occasionally Black Hills spruce. The latter has a darker foliage, which is found to be denser than the white spruce. It affected about two thirds of the trees and needles sluffed was from 5 percent to 33 percent with it not being very uniform. Found in the Black Hills area of South Dakota. Two possible new diseases of spruce have been seen in the Plant and Insect Diagnostic Clinic recently. Rhizosphaera needle cast is a fungal disease of spruce trees that causes needles to turn brown and fall off. The needles turn brown and appear dead. Rhozosphaera needle cast strikes in mid to late summer. As compared to the original species, i.e., white spruce (Picea glauca), the Black Hills spruce is slow-growing and smaller. Learn which plants thrive in your Hardiness Zone with our new interactive map! Early management includes pruning off and destroying diseased branches. Please excuse if this is a duplicate email. It is, therefore, advised that you keep the tree healthy with proper watering and other maintenance procedures. Black Hills spruce (Picea glauca var. The Black Hills spruce (Picea glauca) is a variety of white spruce native to South Dakota. The Black Hills spruce tree grows best in moist, loamy soil in full sun in its USDA hardiness zones (2 to 6). I did not see any black spots but cannot be sure. After pruning, apply a fungicide to the wounds. The summer before last my Black Hills Spruce had a needle cast disease and shed quite a few needles. Apply a fungicide containing chlorothalonil when new needles are half the length of mature needles, and a second time, one month later, according to package directions. I am having problems with my black hills spruce, the needles are dying. Apply again three weeks later, according to package directions. Information at these websites may help you diagnose the problem:https://www.extension.umn.edu/garden/yard-garden/trees-shrubs/spruce-tree-diseases/fungi-associated-...https://www.extension.umn.edu/garden/yard-garden/trees-shrubs/spruce-tree-diseases/rhizosphaera-need...http://files.dnr.state.mn.us/assistance/backyard/treecare/forest_health/whitesprucediagnosis.pdf, If you are still uncertain after reading the information at the websites, consider asking a forester or certified arborist to assess the tree's health onsite and recommend a course of action.This information may be useful if you decide to hire an arborist:How to hire a professional arborist to help care for your landscape treeshttp://www.extension.umn.edu/garden/yard-garden/trees-shrubs/how-to-hire-a-professional-arborist/. Tree Type Mature Size The Black Hills spruce grows to a height of 30–60' and a spread of 15–25' at maturity. Bark color and texture Scaly bark, silvery-gray in color. Spray the infected Black Hills spruce tree with a fungicide containing Chlorothalonil, according to package directions, in early spring when new needles are small.
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