To identify diseases in maple trees, examine the bark for cankers and lesions, check for signs of girdling roots and analyze the tree to see if verticillium wilt is present. The difficulty of the identification process depends on numerous factors, including the visibility of the symptoms.Know More
The most common maple tree diseases come from fungus that causes cankers on the bark. Pink and black lesions are a sign of nectria cinnabarina. Nectria galligena can be identified by bark that looks like split and peeled paper. Eutypella looks similar to nectria galligena; however, it is thicker and more difficult to peel. Valsa cankers look like white or gray warts and grow in shallow recessions on young trees and branches. Steganosporium cankers look like a brittle, black layer covering previously diseased bark. Young maple trees may be affected by cryptosporiopsis cankers, which look as if the bark has been forcefully pushed into the trunk. Bleeding bark looks wet and may also peel. Rotting wood and bark at the base of the tree is often a sign of basal cankers.
Girdling roots are twisted and not able to deliver water and nutrients to the tree. Signs of girdling include a decrease in leaf size and brown borders surrounding the leaves. The limbs may also die completely.
Verticillium wilt occurs when fungus enters the root system. Signs of verticillium wilt include fading yellow, brown or green leaves and wilting branches. This often occurs on one side of the tree.
The most common identifying characteristics of a black walnut tree are found in its leaves, bark, twigs and nuts. Oval, sharp-pointed leaves with indented edges alternate on the branches, with the largest leaves toward the center. The black or gray-brown bark shows heavy furrows and twigs are hollow inside.Full Answer >
Ash trees possess opposite compound leaves without teeth, winged seeds and gray grooved bark. They also have branches and leaves that lie directly across from one another on the main limb or branch, known as opposite branching.Full Answer >
To identify a tree's species, look for its leaf, fruit, cone or needle in a tree species guide, such as the one at Arborday.org. When leaves are shed during the winter, examine other parts of the tree, such as twigs and branch patterns.Full Answer >
The wild cherry tree, also known as the black cherry or Prunus serotina, is a deciduous tree found throughout the United States. According to North Carolina State University, the tree is usually between 50 and 80 feet tall with a conical or pyramidal shaped crown. As the tree is deciduous, its leaves change color depending on season. Leaves of the wild cherry are usually between 2 and 5 inches wide.Full Answer >