Necessary cookies are absolutely essential for the website to function properly. The autumn blaze maple tree has a regular and upright growth with production of a heavy number of fruits. Asked May 24, 2018, 10:25 AM EDT. Sugar maple: large, irregular, brown or red-brown areas develop along and between the veins similar to injury due to drought and heat stress. What else makes the Autumn Blaze® a must-have? Trees become infected when the fungus, which can live dormant for long periods in the soil, enters through roots wounded by insects or mechanical injuries. Thuja Gardens offers three sizes of Autumn Blaze Maple tree and free shipping. I do have pictures, I am not sure if I can send to you or upload. The fungus is most active in cool weather, which means symptoms most likely will first appear in late spring. About the Autumn Flame Maple. In late summer, raised, tarry spots form on the yellow spots, causing leaves to drop prematurely. There's no treatment at this point. The most common – and least important – problems can be seen on the leaves. Wilts are contracted by the autumn blaze maple tree through infected seeds, plant debris, or infected soil. The prized ornamental maple trees in your home landscape might be under the dangerous threat of tree borers. Verticillium wilt is another fungal disease that can affect Autumn Blaze. The tree blooms in spring and sheds by fall, when it looks simply stunning. 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! autumn blaze maple diseases. Once you plant your maple, flood it with water to settle the roots. Fungal rot diseases attack maple trees stressed by injury or environmental conditions and often enter through exposed wounds. Scorch symptoms tell us that one or more of the following factors are affecting the tree: 1. Check for cankers on the bark . Identification of Red Maple The leaves: deciduous, opposite, long-petioled, blades 6-10 cm long and usually about as wide, with 3 shallow short-pointed lobes, sometimes with two smaller lobes near the base, dull green and smooth above, lighter green or silvery beneath and more or less hairy. The mites feed themselves by gorging on the plant’s parts, which is the reason why the autumn blaze maple starts to look pale yellow and stippled. struggle with several diseases. All three of my established Autumn Blaze maples are exhibiting black edges/spots on the leaves, the leaves are wilting, and all three trees have gone to seed. Fertilization can make the problem even worse. Sienna Glen Maple trees can tolerate wet and alkaline soils. Brown spots on "Autumn Blaze" maple leaves usually indicate a disease, such as tar spot, leaf spot or anthracnose. Tolerates the alkaline soils of urban areas and of Southern Wisconsin. Grown for their beautiful foliage and the shade they provide, maple trees (Acer spp.) If an Autumn Blaze maple is suffering from chlorosis, or iron deficiency, the first sign will be yellow pigmentation between the normally deep-green leaf veins. This tree is a subspecies of half red maple and half silver maple, which are both hardy trees. And thanks to its fast growth, with gains of 3 to 5 feet per year or more, that dazzling fall show is just a click away. Autumn Blaze maple trees boast both beautiful fall foliage and a shapely form. Flower Color- Green/Yellow. I doubt its hardiness as there are five in my small town hat have seen below -40 with no dieback in 5 years now. Brilliant, Easy-to-Grow Fall Color Why Autumn Blaze® Red Maple Trees? Autumn Blaze Maple trees have black leaves, are wilting, and gone to seed. This shade tree thrives in warm climates extending well into the deep south and west; will tolerate wet areas with well draining soil. Maple trees come in a variety of colors and varieties, and can reach heights of 25 feet to 90 feet tall, depending on the species. Cause Samples with Verticillium wilt have dominated the maple problem diagnoses sent to the OSU Plant Clinic. Shore flies, fungus gnats, aphids, scale insects, and caterpillars are some of the other culprits that can create a few autumn blaze maple problems. Autumn Blaze Maple Trees for Sale Online Autumn Blaze Maple Trees are an improved hybrid Red Maple trees with brilliant, long-lasting orange-red fall color, a uniform branching habit, and a rapid growth rate. It is a Acer x freemanii 'Jeffersred' Autumn Blaze. Though, similar to any other maple tree, the autumn blaze maple will fall prone to common diseases and attacks by insects, pests, and fungi. The Autumn Blaze maple tree is a hybrid species comprised of half red maple and half silver maple.The combination has been popular for 20 years in commercial and residential plantings thanks to the combination of gorgeous fall color and rapid growth - exactly what homeowners are seeking. The fruits of the autumn blaze are bright yellow in color and are edible. No more waiting for you maple tree to grow, because the silver maple contributes to the vigor without interfering with the natural strength of the red maple. Interesting Facts About Autumn Blaze. 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. Tar spot forms yellow spots on the leaves in early summer. Through appropriate knowledge and proper care, one can definitely cultivate the tree the way one likes, without encountering too many problems on the way. Sugar Maple Tree Picture They are showy but do little damage. While anthracnose potentially can kill other species, the disease in maples is relatively mild. Tar spots won't harm the Autumn Blaze tree's health, but heavy infections can cause early leaf drop. These cookies do not store any personal information. Sienna Glen® Maple is an excellent alternative to the commonly planted Autumn Blaze Maple with stronger wood and denser branching. Fertilization and watering may help to reduce the disease. This disease can kill a tree if left untreated. In today's Hands on Gardening, Cory Malles shows us a few different kinds of diseases that affect maple trees and how you can treat them The trunk diameter is about 3" wide and the tree is about 7ft. You can avoid this problem by adding iron and magnesium to the soil and by decreasing its alkalinity.The tree requires proper care and thorough knowledge about the various problems that can affect it. The spectacular red foliage of Autumn Blaze maple (Acer freemanii "Jeffersred") makes it a popular deciduous shade tree. Well, we're looking for good writers who want to spread the word. Let’s find the problems associated with this tree as well as the diseases that this tree is prone to, which is essential to know so that you may take better care of it. Also related: Black spot disease on other plants; The solution to eliminating black spots on maple . An autumn blaze maple takes years to die from root rot, slowly declining over each season. The primary measure is to learn the proper techniques about maple tree planting and maple tree care. Previous Next > Did you find this helpful? 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. To get rid of the above-mentioned, individual scouting is necessary. ... they can adapt to a wide range of soil conditions and are both insect-resistant and disease-resistant. Imagine eye-catching, reliable red fall color that's second to none - with our Autumn Blaze ® Red Maple, you'll get amazing hues and more. Its symptoms include deformed leaves with discolored or dead blotches. Small, brown fruiting structures of the fungus are found near the affected leaf veins. Read on to learn what this disease is and how to protect your maple trees against it. The older leaves do not appear to have this problem. ‘Autumn Flame’, ‘Tilford’, and ‘Gerling’ red maple varieties are relatively resistant to leaf spot. Its leaves are the classic lobed maple shape and are bright green with a hint of scarlet in the spring and summer, turning to a brilliant red early in the fall. And thanks to its fast growth, with gains of 3 to 5 feet per year or more, that dazzling fall show is just a click away. She has worked for several newspapers, including "The Washington Post" and "The Charlotte Observer." Will tolerate urban soils. Varieties such as autumn fantasy or sienna glen have the same desirable attributes, but have better form and therefore incur less storm damage. This article was last updated on 10/05/20. It’s the right tree, for the right place, at the right time. Winter buds, clusters of small winter spring flowers, leaf stems, twigs, and winged summer fruits are all reddish colored. One must always supervise each plant and look for the presence of the above-mentioned troublemakers. This fast growing, easy to care for tree with gorgeous fall color has been wildly popular for 20 years in commercial and residential landscape.Have you ever noticed after a big storm or high winds you are seeing breaking, splitting or damaged branches to your Autumn Blaze Maple? Aug 10, 2017 - Explore Rhett Roberts's board "Autumn Blaze Maple" on Pinterest. Occasionally the leaf margins are yellow or chlorotic. October 16, 2018 by G Dave ... We planted two beautiful Autumn Blaze maple trees in our yard in Ontario Canada about 10 years ago. Rhytisma fungi cause a variety of tar spots on maple leaves that are nonlethal but unsightly. The flowers of the autumn blaze maple are generally not clearly visible. The Autumn Blaze® Maple is a selection of Freeman Maple (Acer x freemanii), which is a naturally occurring hybrid between our native Silver Maple and Red Maple. This is actually a harmless autumn blaze maple disease that is caused by fungus and pathogens. Autumn Blaze belongs to a group called Freeman maples, named after Oliver Freeman, who first created a hybrid group in 1933 by crossing two species: silver maple and red maple. The Autumn Blaze® Maple is a selection of Freeman Maple (Acer x freemanii), which is a naturally occurring hybrid between our native Silver Maple and Red Maple. The good news is that as it is a hybrid version of the maple tree, the autumn blaze maple is not prone to as many diseases as ordinary maple trees. Water maples during drought, avoid root damage, fertilize if necessary and ensure proper soil drainage. The flowers of the autumn blaze maple are generally not clearly visible. Check Back Soon - We're Almost Finished Building a Time Machine Out of a DeLorean Autumn Blaze maples, like their parent the silver maple, cannot change the soil environment to allow easier nutrient absorption. There are a few things that can be performed to reduce the autumn blaze maple’s problems. old Autumn Blaze Maple. Fast Growing Trees has 3-4 foot trees or 5-7 foot trees for sale online. Victory Gardening in 2020: Spring is Not Cancelled, Green Pavement Creates Beautiful Environmental Solutions, How to Use & Source Eco Mulch for Your Garden. The fully grown tree has an oval shape, which can be maintained by regular pruning when the tree is young. Girdling roots can kill your maple and are difficult to treat, so prevent them by removing any circling roots on your young October Glory. There are minimal disease or pest problems with this specific variety of maple. You can also put them in the compost. This hybrid has the strong branch attachment of the red maple and fast growth rate of the silver maple. It’s the best of both worlds! Sumac is one of the shortest fall-foliage standouts. These cookies will be stored in your browser only with your consent. Cut down the usage of nitrogen-heavy fertilizers and avoid over-irrigation. This hybrid, a cross of red maple … PlantFiles Pictures: Freeman's Maple, Hybrid Red Maple 'Autumn Blaze' (Acer x freemanii) by growin Welcome to the famous Dave's Garden website. This category only includes cookies that ensures basic functionalities and security features of the website. Ultimately, autumn blaze maple is popular and well known. 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. As the fungus overwinters in soil, it can also be harbored into other common weeds. But opting out of some of these cookies may have an effect on your browsing experience. Foliage Color- Green foliage in the summer and orange to red in the fall. Drench applications are best made in the spring as new plant growth appears. Join our friendly community that shares tips and ideas for gardens, along with seeds and plants. Less susceptible to chlorosis symptoms (yellowing leaves) than red or silver maples. Select from premium Autumn Blaze Maple Tree of the highest quality. This results in less chlorophyll which is detrimental to the health of the autumn blaze maple. Like verticillium wilt, a fungus in the soil causes root rot and a diseased tree will not recover. Clarkson earned a Bachelor of Arts in journalism from the University of Florida. Nonetheless, there are certain maple tree diseases that can create problems with the autumn blaze maple. Eutypella looks similar to nectria galligena; however, it is thicker and more difficult to peel. This tree requires iron and magnesium for the formation of chlorophyll, the photosynthetic active green pigment that is found in the leaves of all green plants. It is mandatory to procure user consent prior to running these cookies on your website. These problems are usually cosmetic and rarely require treatment. On identifying them take proper but safe preventive measures, and that includes fertilizers. Asked May 24, 2018, 10:25 AM EDT. Huge collection, amazing choice, 100+ million high quality, affordable RF and RM images. Rake up all fallen leaves. Many of my customers inquire about them. When Grandma Koch saw the new tree, she immediately said it was too close to a mature maple growing behind the house. Is It Worth My Time to Use Natria Weed Killer? Redpointe ® Maple is a rising star on the shade tree horizon. 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. After that care is mostly hands off, but watch out for diseases and pests, like aphids, scales, and borers.. It does grow fast and has a nice, red fall coloring, but the narrow (acute) branching habit makes the variety prone to storm damage. I have a maple tree that we planted about 3 years old, and was doing fine until this year. a close view of maple tree bark on an autumn day. As the disease and the season progresses, the spots grow and may eventually cover the entire leaf. These problems are usually cosmetic and rarely require treatment. Here are the autumn blaze maple tree problems that one must know, in order to maintain good health of the plant. Because they are so popular, Autumn Blaze Maple trees are widely available from a number of reputable online dealers or from local garden centers. Autumn Blaze Maple Problems. Page 1 of 4. We'll assume you're ok with this, but you can opt-out if you wish. Sign up to receive the latest and greatest articles from our site automatically each week (give or take)...right to your inbox. The most common maple tree diseases come from fungus that causes cankers on the bark. The mites feed themselves by gorging on the plant’s parts, which is the reason why the autumn blaze maple starts to look pale yellow and stippled. Provide consistent care for vigorous maples with a greater capacity to avoid infestations. Autumn Blaze Freeman Maple was the first freeman maple marketed which is one reason I believe it is so well known. At this time, the leaf’s cells are very weak and may die due to the lack of chlorophyll and the iron-magnesium combination. By late summer, the spots have become thick, shiny lesions up to 1/2 inch in diameter. Well, the tree was already planted, and it … After that, provide water during the first growing season. It is confined to tan or brown spots on the leaves, and it can lead to leaf drop. Tree Diseases With Prematurely Falling Leaves, WSU Clark County Extension: Autumn Blaze Maple, Purdue University Extension: BP-6-W Verticillium Wilt of Shade Trees, University of Rhode Island Horticulture Program: Anthracnose Diseases of Shade Trees, University of Missouri Extension: Verticillium Wilt in Maples. The Autumn Blaze Maple is a hybrid tree created from two American classics; the red maple and the silver maple, taking the best characteristics from each. The leaves may become scorched and drop, and branches may die back. The diseases this maple may be susceptible to include scorch, tar spot, girdling roots, and leaf spot. Hi- I have a 3yr. I cut the top cleanly at … And if the tree is planted in a yard that cannot support that size, something will need to be done to contain or move the tree. Find the perfect Autumn Blaze Maple Tree stock photos and editorial news pictures from Getty Images. These are outstanding fall foliage specimens. Gather and burn all the leaves to eliminate any chance of having the fungus survive. When it is established, Autumn Blaze maple trees are drought tolerant. It boasts … It was believed to have the fast growing attributes of the silver maple but the stronger wood of the red maple. When it is established, Autumn Blaze maple trees are drought tolerant. tall. Imagine eye-catching, reliable red fall color that's second to none - with our Autumn Blaze® Red Maple, you'll get amazing hues and more. It is classified as a shrub, although staghorn sumac (Rhus typhina) can grow to be tall (18 to 35 feet) and rather tree-like. I have an 4" diameter autumn blaze maple which was planted 3 years and this spring leafed out very healthy. In addition, the Autumn Blaze is very hardy and can withstand a wide range of climatic conditions. Autumn Blaze Maple Acer x freemanii ‘Autumn Blaze’ Red Sunset is a red maple cultivar with superior fall color and good branch structure. An Adaptable, Gorgeous Tree Fit For Every Landscape The Autumn Blaze Flowering Pear Tree is a magnificent choice for every yard. This website uses cookies to improve your experience while you navigate through the website. Read more about Maple Trees. Midway through Spring this year the new growth started to develop holes in the leaves. I have developed a problem with my Autumn Blaze Maple and have included a picture. Norway maple: narrrow, purple to brown streaks occur along the leaf veins. The difficulty of the identification process depends on numerous factors, including the visibility of the symptoms. No need to register, buy now! Why Autumn Blaze ® Red Maple Trees?. The Autumn Blaze maple tree is a hybrid species comprised of a mix of red maple and silver maple. You can't go wrong by adding this tree to your landscape.It has remarkable ornamental value in every season. Its uniform pyramidal shape and strong central leader make it a close substitute for Ash trees, but with better overall form. The spots start off in the spring on top of the leaves as small yellow areas. To prevent this, one must try to cultivate species that are wilt resistant. Although also popular because of its disease resistance, an Autumn Blaze maple can have some problems. See more ideas about autumn blaze maple, shade trees, red maple tree. Autumn Flame Maple trees are a patented variety of tree with the scientific name Acer rubrum. Knowing how to identify the various causes of maple tree blight will allow you to make the best decisions possible regarding the health of your trees. Acer x freemanii ‘Sienna’ Plant Details. The tree has a rounded oval form and its leaves resemble the leaves of the silver maple. The Autumn Blaze Maple is not found naturally in the wild. This tree’s foliage is a combination of deep red with a golden-orange tinge that makes it truly blazing with color! When planting a tree, many people do not take into consideration that a "baby tree" will be that large 20 or 30 years later. Verticillium dahliae, a soilborne fungus that is almost impossible to eradicate once established in the soil.There are over 300 plant species susceptible to this fungus. Autumn Blaze maple tree care is not difficult. It is a fungus that multiplies during the cold and moist season. Once you plant your maple, flood it with water to settle the roots. Nothing has changed with our soil, except a massive amount of rain this month (6+"). At the beginning, these tar spots are pale yellow in color that later on turn dark. The leaves of Autumn Blaze maple tree have five-pointed lobes with toothed margin. It has an expected life of nearly a century, or even more, so when you plant a tree like this, it is for life. Nonetheless, there are certain maple tree diseases that can create problems with the autumn blaze maple. In many cases, signs of disease can be subtle at first. Timing, Timing, Timing: When to Mulch Your Garden & Yard. Highly popular, award-winning Acer x freemanii 'Autumn Blaze' (Freeman Maple) is a fast-growing, large deciduous tree noted for its ascending branch habit and glorious fall color. Infected leaves develop small, irregularly shaped brown spots in the beginning of the growing season. Table 1. Some of the most common problems associated with this tree are outbreaks of tree diseases and fungus infestation. Anthracnose in maple trees is quite common. Its rich, dark green foliage turns from vibrant yellow-orange to burgundy in fall. After that, provide water during the first growing season. Related Articles. This website uses cookies to improve your experience. Scorch symptoms are light brown or tan dead areas between leaf veins or around the leaf margins. This disease can cause the Autumn Blaze maple to drop its leaves all over or in certain parts. This highly adaptable, durable and resilient tree is unmistakably stunning throughout the year. Though the disease is not harmful and there is nothing much one can do to prevent it, you should remove the infected leaves when the tree seems dry and avoid overhead irrigation. Autumn Blaze maple tree care is not difficult. Find the perfect autumn blaze maple stock photo. Other Choices With Colorful Fall Leaves . I can't understand why some dieback though. Autumn Blaze Maple Stock Photos and Images (345) Narrow your search: Vectors | Cut Outs. Nectria galligena can be identified by bark that looks like split and peeled paper. Anybody have some good autumn blaze maple pictures? Spray with mancozeb three times, two weeks apart, when the leaves begin to unfold in the spring. Early symptoms include off-color, limp leaves that quickly turn dry and brittle and drop off. Its dense, oval to rounded canopy of deeply cut, bright green leaves, turns brilliant orange-scarlet to crimson-red in fall. As the disease progresses, the soft sapwood beneath the bark turns dark green to black. The spectacular red foliage of Autumn Blaze maple (Acer freemanii "Jeffersred") makes it a popular deciduous shade tree. The Autumn Radiance Red Maple is a large deciduous tree, with a rounded crown, that will in time reach 40 or even 50 feet in height, with a spread of 35 to 40 feet. This hybrid, a cross of red maple (Acer rubrum) and silver maple (Acer saccharinum), was introduced in 1982. I live in southern Minnesota and planted the tree in the spring of 2010. Silver Maple’s physical strength and its robust health and Red maple’s natural strength can make this Autumn blaze maple grow fast and make it stronger than other trees . 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! Winter buds, clusters of small winter spring flowers, leaf stems, twigs, and winged summer fruits are all reddish colored. November 6, 2020 0 Comments. Though, similar to any other maple tree, the autumn blaze maple will fall prone to common diseases and attacks by insects, pests, and fungi. Leaf Scorch: On maple (Acerspecies) trees a number of problems cause symptoms that are generally classified as leaf scorch. It is caused by dry … Not only is the Autumn blaze maple tree fast growing and strong, it is adaptable to many soil conditions, disease and insect resistant. The fungus blocks water movement in the tree by congesting its water-conducting tissue. Anthracnose in maples rarely kills them, but it can be worse in rainy seasons. When planting a new October Glory, water it well and regularly until it has established its roots, typically for one season. What else makes the Autumn Blaze® a must-have? It has starting wilting on about 1/3 of the branches and the leaves die off in a few days. Find help & information on Acer × freemanii Autumn Blaze = 'Jeffersred' Freeman maple [Autumn Blaze] from the RHS Some of the most common problems associated with this tree are outbreaks of tree diseases and fungus infestation. - maple tree stock pictures, royalty-free photos & images green maple leaf over blue sky - maple tree stock pictures, royalty-free photos & images surrounded by tall trees, low angle shot - autumn season - maple tree stock pictures, royalty-free photos & … The fall foliage season is a bit ahead of schedule this year — but that’s not why maple trees all over the Twin Cities have been turning color and dropping leaves, weeks before official autumn. Autumn Flame Maple trees are a patented variety of tree with the scientific name Acer rubrum. About 1 month ago, the tree was staked down and during a storm the top 1/3rd of the tree snapped off as well as a few lower branches. Aileen Clarkson has been an award-winning editor and reporter for more than 20 years, earning three awards from the Society of Professional Journalists. We hope you are enjoying Gardenerdy! The autumn blaze maple tree is actually a cultivar of the silver maple (Acer saccharinum) and red maple (Acer rubrum) and is scientifically known as Acer freemanii. When planted in alkaline soil, the plant doesn’t get the required amount of iron and magnesium. 'Autumn Blaze': Plant zones 4-8, hybrid of silver maple and red maple. About 3 or 4 weeks ago, the leaves on two braches coming off the trunk, have wilted and dried up. Buzzle.com is Coming Back! We chose a nice ‘Autumn Blaze’ maple and planted it in the back yard, a good distance from all the other trees. This autumn maple cultivar is a huge success as it contains all the desired qualities of maple trees in a single tree. Autumn Blaze Maple Tree Care. Freeman Maples retain the rapid growth of their Silver Maple parent and combine it with the improved structure and fall color of Red Maple. Copyright © Gardenerdy & Buzzle.com, Inc. Freeman Maples retain the rapid growth of their Silver Maple parent and combine it with the improved structure and fall color of Red Maple. Physiological leaf scorch is the most common. Every time Mark Vitosh sees another 'Autumn Blaze' maple planted in the landscape, he gets slightly uneasy. Maple Tree Leaf Diseases. Pink and black lesions are a sign of nectria cinnabarina. Sienna Glen Maple . Spider mites multiply quickly and can also create webs that can cover infested parts of the trees.For prevention, the weeds need to be kept under control and infested plants destroyed. All three of my established Autumn Blaze maples are exhibiting black edges/spots on the leaves, the leaves are wilting, and all three trees have gone to seed. Anthracnose is a fungal disease found in many shade trees, including maples. As a result, the plants wilt because the water conducting mechanism of the plants are damaged by the fungi. Imagine eye-catching, reliable red fall color that's second to none - with our Autumn Blaze® Red Maple, you'll get amazing hues and more. © Copyright 2020 Hearst Communications, Inc. Up until 2 weeks ago it had nice 3" length leaves. Tailored for today’s streetscapes and landscapes, it is a heat resistant, vigorous growing, colorful choice for sustainable landscapes. Smaller and new leaves are the most affected and as a result, they appear yellow with green veins. You also have the option to opt-out of these cookies. The Autumn Blaze Maple tree is a great tree for your yard. The solution is to give your tree well-drained, friable soil and to avoid overwatering or using phosphorus or nitrate fertilizers. Autumn Blaze Maple Tree Care. See: Verticillium Wilt in the Pacific Northwest. By contrast, Autumn Blaze maple trees are consistent about reaching their mature height of about 50 feet, with little variation. These trees are really starting to impress me. This tree works well when planted as a shade tree. Growing in U.S. Department of Agriculture plant hardiness zones 2 through 10, depending on the species, the thin-barked, shallow-rooted trees are often attacked through wounds caused by … To identify diseases in maple trees, examine the bark for cankers and lesions, check for signs of girdling roots and analyze the tree to see if verticillium wilt is present. Use some fungicide, only after reading the instructions on its label. I cannot see any bugs on or under the leaves. Printer Friendly Version. Autumn Blaze Maple trees have black leaves, are wilting, and gone to seed. Brown spots on "Autumn Blaze" maple leaves usually indicate a disease, such as tar spot, leaf spot or anthracnose. Diseased Leaves. Would you like to write for us? It’s fine to wait for leaves to fall naturally. By late summer, the spots have become thick, shiny lesions up to 1/2 inch in diameter.