It starts on the inner and lower growth … Symptoms. Many spruce species, such as Colorado blue and Engelmann spruce are highly susceptible; white spruce is intermediate in susceptibility. At planting time, landowners should consider trees other than blue spruce… The Blue Spruce is a coniferous tree in the pine family. If you have seen trees affected by needle cast disease in the area, avoid planting this highly susceptible tree. This needs to be done during the dry weather to further keep the disease from spreading. The Blue Spruce is drought tolerant, meaning it can survive in prolonged dry periods. These trees do not survive well in flooding or when overwatered. Early detection and proper diagnosis is important in the treatment … Management & Treatment … Cytospora canker ra… Disinfest pruning tools between cuts to avoid spreading the disease. But, some blue spruce will be much more susceptible to this needle disease throughout their lives, regardless of the weather, and may need continued treatment to maintain a full complement of foliage. These are signs the tree may defoliate. The... Tree Fungal Infections: How to Manage. Common pine tree diseases include Rhizosphaera needle cast and Cytospora canker fungus. Check if the tree has yellow or red colour or is covered with black spots. Rhizosphaera needle cast (Rhizosphaera kalkhoffii) is a foliar disease of spruce trees. Examining the tree is the first step in addressing disease. Occasionally, Cytospora canker is found on Douglas-fir, hemlock, and larch. Examining the tree is the first step in addressing disease. The Cytospora canker, a stem disease, affects branches and trunks of trees. How to Care for a Diseased Blue Spruce Tree Common Blue Spruce Diseases. It is most common in trees growing outside of their native range. If you notice these signs, prune all the affected areas. If a tree has this problem, cut off branches. Some spruce trees, such as Colorado Blue Spruce may be susceptible to environmental stress. Infection by this fungal disease commonly starts in the … The classic symptoms of needle cast include brownish purple discoloration and eventual death of older needles, while current-year needles show no symptoms (Figure 1). It is also known as the “Colorado Spruce.” Unfortunately, this tree is susceptible to different diseases that affect the bark, needles, and surrounding trees. Symptoms of both needle cast diseases look similar to each other. If you notice these signs, prune all the affected areas. These diseases primarily affect blue spruce. Always disinfect the equipment when done pruning. Another key characteristic of needl… When you first plant trees, water them every week during the first year until the ground freezes. These are signs the tree may defoliate. Norway spruce (P. abies) is highly resistant to this disease. To properly care for your Blue Spruce, make efforts to prevent disease (or treat it before it can spread and cause more harm). Cytospora Canker of Spruce particularly attacks blue spruce, in addition to Norway spruce, hemlock, red cedar, fir and white pine trees. Always disinfect the equipment when done pruning. Another fungal disease affecting spruces is Rhizosphaera needlecast. While fungicide sprays cannot be timed to effectively control the disease, dead branches should be removed in late winter or during dry weather. You may notice orange spores or projections on the tree, which affect seed viability. Trees that are 15 years old or older and are at least 20 feet high most typically show symptoms of this disease. Some Colorado blue spruce cultivars, like ‘Hoopsii,’ and ‘Fat Albert’ are reportedly more resistant to the disease. Spectro-90, or … Two needle cast diseases occur in North Dakota: Rhizosphaera needle cast and Stigmina needle cast. Other hosts include: deodar cedar, Douglas fir, true firs, hemlocks, pines and coast redwood. Susceptibility varies widely among species, but generally trees under stress or growing outside their natural range are more prone to the disease. White spruce … Symptoms may first appear in mid- to late-summer as … Similarities and differences between the two diseases exist. Instead, consider planting Norway spruce, which is resistant. Fungi from several species of the genus Chrysomyxa create needle rust, affecting both cones and needles. During the summer months, water frequently to keep the soil moist, but make sure the soil does not retain the moisture so much that it remains wet. This disease can also affect Norway spruce (and less frequently other spruces) as well as Douglas-fir and balsam fir. Place all the branches, needles, and other material in trash bags and properly dispose of it. The recent pattern of milder than usual winters and cool spring temperatures combined with wet conditions in the northeast have favored development of a fungal disease known as "needle cast". Cytospora canker, caused by the fungus Cytospora kunzei (also known as Valsa kunzei var. piceae), is the most prevalent and destructive fungal disease of Norway and Colorado blue spruce. Copyright © 2020 Caledon Treeland | Powered By: Local SEO Search Inc. Top SEO Agency in Toronto | Sitemap, Coping With Isolation Through Home Gardening, 10 Plants to Add a Splash of Colour to Your Winter Landscape, It’s a Bit Mulch: Mulching Methods for a Healthy Garden, 8 Earth-Friendly Initiatives During the Pandemic. Cytospora canker is one of the most common fungal diseases of Colorado blue spruce. Check if the tree has yellow or red colour or is covered with black spots. In time, trees will become unsightly and should be removed. If affected trees cannot be treated, the tree must be removed to prevent the disease from spreading to other trees. However, surrounding soil should be well-drained and have the right pH balance. Always examine spruce trees for sale before buying. The Blue Spruce is a beautiful addition to any property, but obviously needs some special care. Consult us at Caledon Treeland, and we will happily sell you gorgeous Blue Spruces, and help you have trees that thrive for years to come: (905) 880-1828.