Maple trees are particularly susceptible to scale infestations. Kritchanut/iStock/Getty Images. We have a 30+ year old Norway maple that sprouted most of its leaves in the spring but never matured to full size. I have a 12 year old green maple tree. Usually called ‘Tar spot’, it only affects certain maples, has no effect on other plants, and hey, it doesn’t even hurt the maples to any significant degree – just makes them look unsightly. All of these pests present as tiny bumps or cottony dots on twigs and on leaves. If you watch out for diseases and know how serious they may or may not be, you will enjoy your tree for many years. The living tree has light yellow/ greenish leaves. Since Verticillium enters through damaged roots, it is important to try to not damage the roots of your maple trees. Maple trees are particularly susceptible to scale infestations. Wet spring, no rain for several weeks, rainy again in upstate NY, zone 4. We have a mature maple stand in our yard. He said to deep water it for a couple of weeks and I have, every three days, along with the normal daily lawn watering. This fall it turned yellow with a light tint of red. This spring, one started to produce leaves, but then suddenly stopped. However seeds can be externally contaminated, so seedlings can become infected. The trees are very much alive and he said he did this early on I’m the year and they are still alive. Yes, this tree has a good single trunk, no signs of issues that I can tell. I have three maple trees. We live in va beach, 5 miles from ocean and possible hurricane track. As well, create a circle around each tree, 3 feet across, with no grass. Should I be worried? Now I have many dead branches and leaves and keys are turning brown and dying at a fast rate. I just did another scratch test on the grayish colored trunk but scratched lighter this time, I noticed green under the gray if I did not scratch too hard; the green seems thin. leaves all over are curling and leaves feel papery. If some branches are dead, and produce no leaves, then it is probably wilt. Feed with a tree fertilizer, and cover the soil with a rich organic mulch like garden compost, or rotted animal manure. Taking a long time to die is typical, and suggests a weak form of the fungus, so the odds are better that you will be able to lock it inside successfully. If there is, remove it, and trim the edges back to clean, white bark. There do not appear to be any aphids or any other insects on the tree. There may be one or several spots on each leaf and leaves with a lot of spots may turn yellow and fall prematurely. If it seems healthy under there, then I am not sure. I don’t know where you are, but this disease has killed a lot of mature sugar maples in some places. One woodp… We have a 5-year-old Sensation Maple that was planted in our yard by the nursery (it was probably a year old or so established already at the nursery, so it may be 6 or so now).  However, boxelder bugs are harmless to people and pets. Branches seem to be dying back more than in the past. That’s a tricky one. Most trees survive. Small, curled up, brownish, some black spots and the bark appears to be coming off in strips. Those pests include aphids, scales and spider mites. No there is nothing you can do, except pray for different weather. If you Google it you will see many photos to confirm that. The insect attacks more than 70 types of plants, including important crop like grapes, apples and maple trees -- threatening the region’s maple syrup industry. . Carpenterworms (Prionoxystus robiniae) are wood-boring insects that attack maple trees. To reduce spread, collect and bag or burn all the leaves – don’t put them into compost or mix with other leaves to mulch. If there is the the tree is not worth saving, at that size. Has there been any digging around the roots, or trenching, or changes of level that involved cutting roots, in the last 5 years or so? Are there tiny, round insects? I do notice now that there are some larger leaves which have a dark round spot on them (usually one or twoon a leaf) which is about a quarter inch in diameter. I need some expert help. It’s from Nevada Dept of Ag, so it seems relevant to you. adroll_language = "en_US"; http://agri.nv.gov/uploadedFiles/agrinvgov/Content/Plant/Plant_Pathology/BleedingCankerDiseaseSilverMaple.pdf, https://en.wikipedia.org/wiki/Vasates_quadripedes. Do you think with increased water they will come back next spring??? my big maple tree dark purple in color has many white spots on alot of the leaves now is it a fungus do i need to have something sprayed on it. You mentioned in another post about some maples “reversing”, we were never told by the nursery of this, so is our tree giving us another surprise with the coloring, or do we have a worse problem with the wetwood combined with the leaf wilt? They inject toxins into the leaf, causing the leaf to form these structures, which create a nice, comfortable home for the mites. Otherwise, you will probably see a steady decline, with that branch you mention suddenly dying completely. As well, the new growth is very soft, so more prone to breakage. . There are several damaging maple tree diseases and pests. adroll_adv_id = "RK545AVNKVEJFFRYPAE7DC"; Hi there, thanks for the reply. A large tree like that will need plenty of watering during the first few seasons, so that could be the reason it is loosing leaves – they dry faster on the windward side. I just planted the tree in the ground Monday, with some cow manure and really good potting soil. Maple bugs, boxelder bugs, or pests, call them what you will, the bugs are back in a big way. How do we treat a very large sugar maple (25 years old?) They provide shade on a hot day, tasty syrup for your pancakes or a splash of bright color against a dull autumn sky. A fungal fruiting structure that is hard, gray topped, hoof shaped, and 6 to 8 inches across and enlarges perennially. Leaf color in red trees is influenced by shade – they turn greener in shade. We learned our error by putting leaves around it in the winter and will not do that again. I doubt it was the mulch, unless it was contaminated with leaves from a tree like maple or ash, that had this disease on it. Maybe you are more sheltered, so the night temperatures have been a touch warmer – are you in a hollow? All of these pests present as tiny bumps or cottony dots on twigs and on leaves. The damage from the tunnels alone can girdle and eventually kill the tree, and the holes represent the … I ask this because it sounds like Verticillium wilt, and those would be supporting bits of evidence. This helps prevent re-development the following year, but not if your neighbors don’t do it too! While this affects maple trees in general, it especially targets Norway, silver, and sugar varieties. Hello, I am seeing these black bugs (aphids??) I want to love this tree. For more information regarding Pest Control solutions in Calgary â contact One Man and a Lady Bug today 403.262.1666. Losing a loved tree is always painful. adroll_version = "2.0"; Almost no plant diseases are transmitted through seeds. If it is green, then the tree will probably be fine next year. If your tree has too many of these insects, a problem called "leaf drop" can occur. Nonetheless, there are certain maple tree diseases that can create problems with the autumn blaze maple. We just put red bark-mulch around it, and that’s the only thing that’s different. Scott Tunnock/USDA Forest Service/Wikimedia Commons. These usually show up as different kinds of spots on the leaves. Box elder bugs are sap suckers, penetrating plant tissue with their considerable proboscis and using secretions to make it consumable. it starts where the leave is attached to the leave stem. I do not want to fertilize in this weather, do I? A young red maple planted last year looked beautiful until recently. Signs of maple wilt include scorched-looking leaves … I have often seen Verticillium on sugar maple where a whole section dies suddenly, leaving the rest looking perfectly healthy – but it often then dies a year or two later.  This species recently invaded Chile, thus becoming an invasive species.. Cottony maple scale is a soft scale that infest maples, boxelder, basswood, birch, elm, and linden trees. Listing for Acer (Maple) The Genus Acer is the largest group of deciduous trees and encompasses a vast range of shapes, sizes, colours and forms. Good luck with it! What is this and do I need to get the tree treated? Have you had one? Now it is May and I’ve noticed that the leaves on the bottom branches have withered; they are crunchy, but have not changed color. Asian longhorned beetle A new and potentially serious threat to some of North America’s most beautiful and popular trees is the Asian Longhorned Beetle (Anoplophora glabripennis). If the leaves are healthy it should be fine, and hollow trees can live for a very long time. Do they prefer maple trees? Sounds like a Sango-kaku Japanese Maple, right?  The removal of boxelder trees and maple trees can help control boxelder bug populations. Cut some younger branches with dead leaves and slice at a sharp angle through the stem. That doesn’t mean you don’t have another issue, if the branches really are dying. Select a spot where the tree is in full to partial sun exposure (4 to 8 hours of sunlight per day). Mitt. Zool. You are not going to lose your trees. The base of the tree is mulched, and it is on a slight slope in the yard so gets good drainage. If after doing this you have removed bark more than 50% around the trunk, then the tree will not survive – replace it. All the plants near it (next to it in fact) are healthy. We have a 50+ ft sugar maple that had leaves turn and drop very early last year, August. Google some images and see if it looks the same. A mass of boxelder bugs on a fencepost in Bolton, Ontario in September 2018. Once Verticillium is inside a tree it is hard to deal with, although the root feeding method has been shown to often work. This month is has started to turn yellow and the edges of the leaves are browning. The tree should be removed, and the wood burned, not chipped, which can spread the disease around. the start of a fungus or can it just be because there was to much water and it will get better? Although the tree is a good 7 feet tall now, this rapid dying off of leaves on adjacent branches is spreading around the tree. If the tree is as showing as much damage as you say, I don’t think it will live much longer – sorry. Tighten the nut or nuts until the crack closes up. Is it growing in a shady spot? It appears to have tar spot but the spots are often raised. I suggest you have it taken down. Is this maple wilt? On our family farm we have a huge maple (not sure what kind it is) that has been there for over 50 years. The very best maples for fall color in red trees is influenced shade... The removal of boxelder bugs are harmless to people and pets is the white spider looking stuff comes! Red boxelder bugs, which are filled regularly in the Blue Mountains eating. 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