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.
Guava leaves are used primarily to make herbal tea, certain cosmetic and beauty products, and for medicines. Guava leaves, like the fruits and other parts of the plant, are considered safe for human consumption. The leaves of these tropical plants contain an abundance of minerals and antioxidants, which makes them suitable for adding to medicines, teas and cosmetic products.Full Answer >
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 >
Achnanthes placentuloides, Chamaepinnularia justa and Pinnuavis aleemii are three examples of the diatoms found on Earth. Scientists believe there are anywhere from 20,000 to 2 million different species of diatom on the planet, according to the University of Colorado, Boulder.Full Answer >
Quercus alba is the scientific name for the more common tree name of the white oak. The tree may also be referred to as stave oak, ridge white oak, forked-leaf white oak and the fork-leaf oak.Full Answer >