The River Birch appears very similar to the White Birch varieties, with the main distinction being the color of the bark. I have a 15 year old large river birch. Although leafminers do not kill birches, they affect the tree's aesthetics, turning the leaves brown, and weaken the tree's ability to withstand an attack by bronze birch borers or survive extreme environmental conditions. Birch anthracnose or leaf spot Cryptocline betularum, Discula betulina and others. That’s why you see those wilted, yellow or brown leaves. River birch (Betula nigra) is a fast-growing, shade tree native to the Mississippi River flood plain in southeastern Minnesota.It is popular for its ornamental peeling bark. Leafminers are a common insect pest of birch trees. If you are truly concerned about this tree, please contact a local certified arborist for an on-site assessment. If you scrape away a layer of bark on the trunk or branches, you may notice white fungal growth, as well. Live tree twigs are nimble, so they’re flexible, bendable and much harder to break. Try bending a tree branch. Generally, the leaves aren't as nicely formed or as dark green as they used to be. Q: I have a river birch that has 3 trees (clumps) together. You may also find D shaped holes and ridges on the tree truck and the branches. I have to rake every other week to prevent the brown dry leaves that fall in that period from blowing into the neighbor’s yard. Heritage® river birch. This material will be taken up as the tree takes up water for its leaves. Birch Leafminer. The other 2 trees in the clump are fine. Infected leaves fall from tree even if still partly green ; Leaves on lower branches most affected; Leaf spots may be 1/8th to 3/8th inch brown spots to large brown blotches surrounded by yellow tissue (C. betularum) This year I notice that it's dropping leaves that are dry and brown with many holes -- they look like brown … River birch – Dropping Leaves Q: We have a birch tree in the front yard which I think has exceeded its water resources. The largest tree has its leaves curling up and turning brown. My river birch leaves are turning brown. The lower part of the tree trunk may also appear a dark, reddish brown color. If birch leaf blight is found to be the cause, a simple solution is making sure the tree is receiving proper air circulation and promptly rake and remove all fallen leaves from the site in order to help eliminate the fungal spores. I planted it about 6 weeks ago. Hardiness Zone: 6a By b from Berrien Springs, MI Branches and limbs may turn to a dark brown color. During the past few years it has been dropping a lot of branches, and some sections have died back. You can often revive a shocked tree, but you’ll first need to make sure it’s alive and well. River Birch have a tan bark with subtle orange highlights versus the white and grays of the White Birch. I do not see any webbing or holes in the trunk, leaves or branches. The birch tree is popular among homeowners due to its beautiful bark, modest size and graceful branches. Is my newly planted tree dying? Discoloration may also be seen in the wood of your river birch tree. As a landscape plant, it is grown as a single-stem tree or in a clump as a multi-stemmed tree with three or more trunks. 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