A fungus in the soil causes verticillium wilt, so never remove a maple and replant another maple—the disease is still present. The aptly-named "Autumn Blaze" maple (Acer x fremanii) is a hybrid between the fast-growing silver maple (Acer saccharinum) and the showy red maple (Acer rubrum). In a hybrid-like autumn blaze maple, the condition may not be severe and the only symptom may be a thin, slow-growing crown. Learn which plants thrive in your Hardiness Zone with our new interactive map! She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." You can grow both Autumn Blaze and Freeman maple in U.S. Department of Agriculture plant hardiness zones 3 through 8. Leaves with multiple spots may wither and drop prematurely, but seldom so early or in such quantities as to threaten the health of the tree. This fungus serves as a source of food, and may partially be responsible for the death of the host plant. Like verticillium wilt, a fungus in the soil causes root rot and a diseased tree will not recover. Anthracnose: This disease is caused by the fungus Aureobasidium apocryptum. As a result of their phenomenal ability to reproduce, aphids are very difficult to control with insecticides. Prevention & Treatment: The fungus survives the winter in fallen leaves. Scale: Many scale species-including Pulvinaria acericola, Pulvinaria innumerabilis, and Melanaspis tenebricosa are pests of maples. Sugar maple: large, irregular, brown or red-brown areas develop along and between the veins similar to injury due to drought and heat stress. As the disease progresses, the soft sapwood beneath the bark turns dark green to black. Adaptable to a range of climates and soil conditions, the tree's most obvious distinction is its leaves. Read and follow all directions on the label. On the leaves, spots appear with pale yellow centers and purple borders. Wilts are contracted by the autumn blaze maple tree through infected seeds, plant debris, or infected soil. Autumn Blaze Maple Problems. We provide informative articles about gardening, lawn care and landscaping that you can come back to again and again when you have questions or want to learn more! This disease can cause the Autumn Blaze maple to drop its leaves all over or in certain parts. Tar spots won't harm the Autumn Blaze tree's health, but heavy infections can cause early leaf drop. These small spider like mites tend to thrive in hot and dry conditions. The roots of Autumn Blaze, like its parent silver maple, lack the ability to adequately stabilize iron in the soil, leading to chlorosis or yellowing of the leaves caused by iron deficiency. Leaves may yellow and drop early. A certified arborist should be contacted if chemical control is needed. An autumn blaze maple takes years to die from root rot, slowly declining over each season. But opting out of some of these cookies may have an effect on your browsing experience. We planted them in an area that stays pretty soaked most of the time, and I'm wondering if that's why the leaves are starting to turn red. Tar spots are among the most showy and least damaging foliar diseases. The primary measure is to learn the proper techniques about maple tree planting and maple tree care. The roots of Autumn Blaze, like its parent silver maple, lack the ability to adequately stabilize iron in the soil, leading to chlorosis or yellowing of the leaves caused by iron deficiency. Chlorosis generally is not caused because the soil is iron-deficient but because the tree is not able to absorb enough iron through its roots. Learn which plants thrive in your Hardiness Zone with our new interactive map! For example, sprays with insecticidal soap, horticultural oil, neem oil extract, spinosad, Bacillus thuringiensis (B.t. If spraying is required, always spray late in the evening to reduce the direct impact on pollinating insects. Our site includes quite a bit of content, so if you're having an issue finding what you're looking for, go on ahead and use that search feature there! Once a tree has been attacked, it becomes more attractive to further attack. This hybrid, a cross of red maple (Acer rubrum) and silver maple (Acer saccharinum), was introduced in 1982. This disease is most severe during wet weather. The spots start off in the spring on top of the leaves as small yellow areas. The lower surface of a leaf beneath a large tar spot turns brown, but the surface beneath speckled tar spots remains yellow. The symptoms are on all parts of the tree or only on the side exposed to sun and wind. Prevention & Treatment: In general, practices that encourage root development and root function are recommended. The spectacular red foliage of Autumn Blaze maple (Acer freemanii "Jeffersred") makes it a popular deciduous shade tree. The autumn blaze maple's problems start when the tree is planted in soil that doesn't suit it and proper care is not taken, irrespective of the fact that this is quite a hardy tree. A root image by Skilled from, University of Rhode Island: Green Share--Maple Tree Decline, Washington State University Clark County Extension: Autumn Blaze Maple. Autumn Blaze (Acer x freemanii "Jeffersred"), a hybrid of red maple (Acer rubrum) and silver maple (Acer saccharinum), inherited its fall color from the red maple and its rapid growth from the silver maple. At the beginning, these tar spots are pale yellow in color that later on turn dark. Anthracnose in maples rarely kills them, but it can be worse in rainy seasons. Follow all directions, precautions and restrictions that are listed. As they feed on plant sap, they excrete honeydew (a sugary material). Although also popular because of its disease resistance, an Autumn Blaze maple can have some problems. It grows best in U.S. Department of Agriculture plant hardiness zones 3 through 8 and can reach 60 feet high and 40 feet wide. As a result, the plants wilt because the water conducting mechanism of the plants are damaged by the fungi. The fungus blocks water movement in the tree by congesting its water-conducting tissue. The first few years we loved them as they did not produce “keys”, but about 5 years they started producing “keys”. The leaf blade is between 2 and 4 inches long and has a red or green petiole where the leaf stalk is attached to the stem. Scorch symptoms tell us that one or more of the following factors are affecting the tree: Anthracnose of maple (Aureobasidium apocryptum).Paul Bachi, Bugwood.org. They are showy but do little damage. © Copyright 2020 Hearst Communications, Inc. When planted in alkaline soil, the plant doesn’t get the required amount of iron and magnesium. Any cookies that may not be particularly necessary for the website to function and is used specifically to collect user personal data via analytics, ads, other embedded contents are termed as non-necessary cookies. Prevention & Treatment: The portion of the root that is girdling the tree should be removed. Would you like to write for us? Full Sun or Shade for a Crimson Queen Maple, Washington State University Clark County Extension: PNW Plants: Autumn Blaze Maple, Ohio State University Plant Facts: Acer x Freemanii - Freeman Maple, Penn State College of Agricultural Sciences: Leaf Identification, University of Illinois: UI Plants: Woody Ornamentals: Acer x Freemanii 'Autumn Blaze', University of Minnesota Extension: Verticillium Wilt of Trees and Shrubs, University of Illinois Extension: Hort Answers: Red Maple, University of Minnesota Department of Entomology: Leafhoppers. All Rights Reserved. Galls vary greatly in appearance, from wart-like bumps to spindle-shaped protrusions to felt-like patches on the leaf’s surface. We live in Oklahoma and planted some autumn blaze maple trees last fall. 4Malathion may cause slight injury to many maple species. She holds a Bachelor of the Arts in political science and a Master of Fine Arts in writing. Though low maintenance in general, like other maple trees the "Autumn Blaze" is susceptible to Verticillium wilt, which causes yellowing of leaves or browning around the edges. Some of the most common problems associated with this tree are outbreaks of tree diseases and fungus infestation. The life cycle takes approximately 55 days until the emergence of the next generation of beetles, so prompt removal or burning of the wood is important. Bacterial leaf scorch of maple (Xylella fastidiosa).John Hartman, Bugwood.org. The flowers of the autumn blaze maple are generally not clearly visible. If it is determined that chemical control is necessary, the recommended chemicals include the following: cyfluthrin, lambda cyhalothrin, bifenthrin, or permethrin.

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