Discolored leaves can be a sign of illness or stress. One reason for leaf discoloration could be overexposure to heat or the sun. This causes the leaves to look sunburned or brown in summer, called a “leaf burn.”. Alternatively, if the leaves turn stained or brown after a rainy season, you may have a problem with tree fungus.
If your tree has wilted leaves, pay attention. Leaves are what cultivate a tree, collect sunlight and process it into food energy. But if they wither, they don't work at full capacity and the whole tree suffers. If your trees aren't stressed by heat or drought, wilted leaves can mean something else.
If you have waterlogged soil that doesn't drain well, wilted leaves may be an indication. In this case, it is the lack of oxygen that causes wilting, since excess water suffocates leaf tissue. How can you differentiate between leaves on trees that wither from heat or drought and those that wilt from excess water? While both conditions cause the tips and edges of the leaves to brown and die, leaves stressed by heat and drought will turn browner and drier overall, while overwatered leaves will be soft and saggy. Other causes of leaf wilting include diseases, such as fire blight, which appears during hot, rainy spring weather.
Fire blight is a bacterial disease that affects plants in the rose family, including apple and pear trees. Infected leaves wither and appear to be burned. Faded, damp, peeling, or tearful bark may indicate that a tree is sick. The bark is the outer layer of a tree that provides protection.
When it can't do its job, the rest of the tree also suffers. Therefore, damage to the outside of a tree can be more dangerous than it seems. Significant damage to the outside of a tree can completely kill it. If you notice liquid coming out of your tree, you may have alcoholic silt flow.
In extreme cases, the excess fluid that will accumulate around the base of the tree. This liquid often has a sour smell and leaves dark streaks on the bark of the tree. Most trees with alcoholic silt flow begin to produce liquid in spring and summer. Another sign that your tree has a disease is peeling off the bark.
The bark of the tree is important, as it protects the inner core of the trunk and keeps the tree healthy. If tree bark begins to peel off, trees may not retain the necessary nutrients and may die. Keep in mind that many trees normally experience small amounts of bark bark. However, if you notice larger pieces of bark falling from your tree, call a professional arbologist for help.
A common disease in more than 100 plants is fire blight. When a tree is blight on fire, the buds or flowers of the tree turn black. Once the buds and flowers are infected, they will eventually fold and be shaped like a shepherd's crow. Dead or dying branches that hang low, lack bark, and have no leaves.
Once a tree in a row is infected, it moves quickly through the connected root systems and kills all other trees in its path. It recommends that homeowners and businesses inspect their property for any obvious signs of decaying trees and that they call a certified arborist if there are trees that appear to be in danger. If your tree is falling more than the occasional branch, and if these branches are big, it's time to examine it. It's better to find out sooner rather than later, as waiting too long can mean that the disease and tooth decay have spread too far to save the tree.
There are many different diseases that can affect trees, and most are specific to a particular tree species. Infected trees may fall soon after showing obvious symptoms, so it is recommended to remove the tree if you see signs of this fungus. Elm bark beetles also play a role because they are attracted to diseased trees to complete the reproductive stage of their life cycle. Do your best to watch for signs of disease in your trees to prevent them from dying and damaging your property.
A completely disease-free tree is rare because of the many microscopic organisms that live in trees, bark and root tissue. Environmental changes and physical damage are by far the most common problems caused by tree diseases. In spring, those trees come back to life, green leaves reappear and blossoming trees become beautiful works of art. Choosing trees with thick, protected leaves adapted to wind and salt conditions is the best way to minimize wind damage; save more sensitive trees for protected areas.
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