Leaf spots on mature leaves are often found with minor wounds like insect feeding. Chlorosis of River Birch, Red Maple, and Others ; June 26, 2002: Chlorosis (yellowing) refers to leaves that are light green or yellow--not a healthy, dark green. It is an infection caused by bacteria and fungi, and results in spots on the leaves. Partial to complete defoliation may occur under favorable conditions for the causal fungus. Red colored tree leaves provide a startling contrast to many of the more common colors in nature. Birch Trees. Damage appears as small brown or reddish-brown irregular shaped patches (a leaf “mine”) on the upper side of a leaf. Often, leaf veins remain dark while the rest of the blade is lighter. These maple trees produce varying degrees of sugary sap and can all be tapped for syrup. You can get powerful betulin extracts online or at many health stores. Outbreaks mostly happen in urban areas. Larvae feed between the surfaces of a leaf. Leaf miners cause excessive defoliation on the tree, causing the branches to drop their leaves long before the usual winter drop. We think our maple tree has anthracnose disease. Infected leaves often drop prematurely. In more severe cases, like Linda's, trees may drop leaves prematurely. vxba001930 Fotosearch Stock Photography and Stock Footage helps you find the perfect photo or footage, fast! Japanese Maple Trees . Asked June 2, 2016, 12:14 PM EDT. The spots may be circular in shape, or they can grow large enough to create clusters across the leaves of your river birch tree. The White Birch tree is characterized by its beautiful white bark (when mature) and drooping branches, whereas the River Birch tree has a brownish-red exfoliating bark and pyramidal to rounded crown. Marssonina leaf spot mainly affects European birch species in Australia particularly species B.pendula Silver and cultivars, Cut Leaf “Dalecarlica” and Young’s Weeping Birch “Youngii”. Another common birch tree disease is leaf spots. The bark is dark red-brown to blackish, and smooth. The leaves are a good source of vitamin C as well as other medicinal … Causes for Leaf Galls on Plants. It was very healthy until it recently developed this fungus or something on the leaves. Birch leafminer (adult). Aspen – the leaves are heart shaped to rounded and are about 2 to 2 1/2 inches long. Black Vine Weevils, Taxus Weevils and Strawberry Root Weevils. The weeping birch tree is susceptible to two types of insect infestations: birch leaf miner and bronze birch borer. Without treatment, the leaves will yellow and eventually drop. Getting a tree service to perform a soil-applied systemic insecticide injection in the spring. Or if the spots are more free-form, that could be anthracnose, another common leaf disease. Thanks! We feature 59,800,000 royalty free photos, 360,000 stock footage clips, digital videos, vector clip art images, clipart pictures, background graphics, medical illustrations, and maps. … The first sign of this infestation occurs with small yellow spots on the leaves. These are the top culprits to watch out for before you park: sugar maple, black maple, red maple, silver maple, Norway maple, boxelder, bigleaf maple, canyon maple, rocky mountain maple, and gorosoe. Yellow birch (Betula alleghaniensis): This tree is native to forests of the northeast U.S. and is also known as the swamp birch due to the fact that it is often found in marshy areas. The edges are more roughly serrated or toothed. In order to control this disease, you have to prevent overcrowding by moderate pruning of branches and leaves. Birch trees have simple leaves with toothed edges called margins. 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