Thank you! The disease continues when fungal spores over-winter in dead leaves and infect trees during a prolonged wet spring. This spring it has yet to leaf out. Anthracnose is commonly mistaken for tar spot. I think the Bayer Advanced should help with reducing stress to your tree. It had a brown soft center 3/4 inch in diameter surrounded by normal wood. I've checked the leaves for insects, but can't seem to find any. silver maple leasions in bark / separating 8 or 10 years old 30ft tall - we live in texas near austin. Some trees are more susceptible to certain types of galls than others, and some galls occur only in certain regions of the country. Sapstreak isn't easy to catch because it mainly affects the inside of the tree. Check out my slideshow at the beginning of my article- slide #7 is a photo of this type of gall. many thanks for your blog it is great! Last year there were even more dead leaves, and some of the dead branches were split. The underlying cause of your problem may be related to the amount of sunlight your tree is receiving. Below you will find a list of diseases that affect maple trunk and bark. Cankers are usually oval to elongate, but can vary considerably in size and shape. General tree maintenance. Doesn't sound unreasonable, but not really sure what the root cause is, so hesitant how best to act. If the rest of your tree looks okay, I suspect that it was just to do a late frost. Is the tree dying? . Hi S. Baker, The spots sound like a fungal problem, but it also sounds like possibly something more serious, like verticillium wilt. These growths often look like large warts on the side of the maple tree and can get to massive sizes. Is there anything I should look for to help determine a cause? Floridanum, while other authorities use Acer barbatum or Acer barbatum ssp. The leaves often show the first signs because they're one of the last tree parts to get water, thus they show under-watering signs first. It is caused by dry … I live in Dallas ,Texas and have a red maple that we planted four years ago and blooms great every year however this spring as of today I am still awaiting leaves. Your tree may need to be cut down, but without seeing the tree in person, it is difficult to correctly diagnose. Often, the center of the canker will bleed during the rising of spring sap. If the spots make an appearance next year, you could spray the leaves with a fungicide; contact your county Cooperative Extension office (in the US) to find out what fungicides are allowed in your area. Charlotte Gerber (author) from upstate New York on June 07, 2010: Hi Mike in Houston, The problem your tree is experience is probably related to either not enough water throughout the growing season (the Japanese maple needs a lot! When the bark is coming off of a tree, and there are woodpecker holes, along with dying limbs, it usually means the tree is dying. Try to get a proper diagnosis to help you make the right decision for your tree. Additionally, the pot is causing restriction of the roots, which is contributing to the problem. This virus causes discolored leaves. Would the Bayer product work on this problem? The tar spot seen on maples is caused by three related fungi, Rhytisma acerinum, R. americanum and R. punctatum. Hi Eric, The tree is savable, but it also depends on how much you want the tree, and is it aesthetically pleasing. You are better off using foam that expands and covering it with a screen to prevent animals and birds from removing the foam. Make sure your tree gets plenty of water during drought periods this year and perhaps use a liquid tree fertilizer or tree fertilizer spikes to help it quickly get over any stress. It kills sucking insects, which are causing the "honeydew" (sticky, syrup-like substance) on your trees. The other tree doesn't yet establish pods, but is full of leaves each year and growing quite well. old Autumn Blaze Maple. What is you suggestion pls. Leaves simply die and fall off while the rest of the tree is healthy. The inner part of the leaf around the veins may remain green. This year the die off is extensive and we have lost 75% of the leaves on the entire tree. Thousands of new, high-quality pictures added every day. Some strains can cause cankers and blight. If there is too much shade on your tree, the leaves can revert to a green color. The main symptoms are yellow, relatively-smaller sized leaves and dark brown or black tree roots. Occasionally the leaf margins are yellow or chlorotic. In the long term would bracing the trunks help to prevent the splitting? What should I do? Over the past few weeks, after a prolonged period of dry and very hot weather in NY, the leaves have turned from red to a greenish brown color and are drooping. Sapstreak is a ground-living fungus that generally enters the tree's system via an injury near the roots or bottom portion of the tree. Hi -- I have a red maple about 60 years old. Should I try to get rid of them and if yes, how do I go aboput it? If you're still unsure whether your tree has anthracnose or not, contact your county Cooperative Extension office- they can come out and examine your trees to make a correct diagnosis. I have a mature maple ( about35 - 40 years old) This year the leaves a much smaller than normal. Fusiform Rust. I took some photos today of our tree and the leaves but could not figure out how to attach them to my posting so I thought I would add a more detailed verbal description. Clean up leaf debris around the tree's base, Leaves that curl around a dead-looking brown spot, tan or brown spots near the leaves' veins, cankers, dying young branches, and premature leaf loss, Late spring to early summer; especially prevalent during wet periods, Keep tree from sitting in moisture; rake leaf debris; prune affected branches, May require treatment of bugs that carry the fungus; can be brushed off, Appearance is all over the place and can be dictated by region, weather, and other factors, Low (but can indicate more severe diseases), Composite organism made of fungi and algae, Can usually just lift lichens off of the tree; may also prune branches that have it, Wilting or yellowing leaves, often concentrated to one area or side of the tree, July and August, particularly seen after a dry and hot summer, Plant resistant strains, remove the diseased tree, and/or fumigate the soil, Symptoms vary wildly; often looks like mushrooms, can be cankers. 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