Norway maple diseases

However, in urban areas, along with other maple trees it can suffer from different diseases caused by a combination of stresses due to pollution, site alteration, soil compaction, etc.4. On the slender trunk sits a pronounced, dense treetop. Since the disease affects the upper surface of the leaves in spring, it generally results in the falling of leaves, before fall. These usually show up as different kinds of spots on the leaves. Thus Norway maple strain of powdery mildew (a specific clone of Sawadaea bicornis) will only affect other Norway maples. It is very important to be able to recognize a disease and treat for it to prevent the death of the tree. Cankers, diseases of the bark, occur mainly after severe winters or extended droughts. Norway maple can grow up to 30 meters (99 ft) tall. The stem thickness of a maple tree ranges from 60 … There are a variety of leaf diseases found in maple trees that vary in intensity from year to year and from place to place. The disease originates in the roots of the tree and moves upwards to the large limbs. They are usually seen in mid to late summer and none of these diseases are life-threatening.

Although the disease does not cause serious consequences to the health of the tree, it destroys the beautiful look of the tree. Such tar spots are common on Norway maple, Silver maple and Sugar maple. Its branches grow diagonally upwards, sometimes horizontally. You may have noticed by now that invasive plants make me a little angry as well as the people who continue to plant invasives, and especially the people who continue to sell invasive plants. Or rather, they really TICK ME OFF. They cause limb dieback and can kill the tree if they progress into the stem. Some diseases of maple trees are quite common and can also be deadly. Norway maple is susceptible to a number of leaf spot diseases that may disfigure leaves and cause early defoliation. Valsa canker – This disease of maple trunks will normally affect only young trees or small branches. This disease can affect Norway maples, sugar, red, silver, sycamore, and Japanese maples. The cankers of this fungus will look like small shallow depressions on the bark with warts in the center of each and will be white or grey. Threats and Diseases In its natural habitats Norway maple is generally free of serious diseases.

Note that ‘Crimson King’ and ‘Schwedleri’, two varieties with dark purple foliage, are the two cultivars considered to be the most susceptible to this disease, so other readers might want to avoid them when choosing trees to plant in their gardens. Steganosporium canker – This maple tree bark disease will create a brittle, black layer over the bark of the tree. In old age, the maple has formed a nearly round crown, its branches do not grow overhanging and do not become excessively long. Norway Maple threatens my roof. Maple Tree Leaf Diseases. Norway maple also suffers from verticillium wilt, a disease that spreads through the vascular system and quickly kills the tree. As a young tree, the maple is fast-growing. The most common – and least important – problems can be seen on the leaves.