The red maple (Acer rubrum) is named known for its striking red displays every season. Winter brings red twigs and buds of spring red flowers in summer and brings red stems and branches. The decline, however, The Red Maple true showcase of the season, the tree produces bright red leaves of purple or burgundy. Red maples are particularly susceptible to a variety of fungal, bacterial and nutrient deficiency diseases, including the often fatal Verticillium wilt.
Verticillium wilt is caused by different types of soil fungi penetrate the roots of susceptible plants. More than 300 crops are in danger, but maples are among the most susceptible trees. Verticillium dahliae is the type that most commonly infected trees in the United States. Verticillium wilt fungi produce toxins and penetrate the water leading tissue of plants that spread upward through spores. In reaction to the fungus to produce gum trees in the infected vessels in an attempt to isolate the invaders. This reduces the flow of water and nutrients from the roots. Some trees are in the isolation of the infection to be successful and to recover, others do not.
Verticillium Wilt in Maples
Verticillium wilt fungus in Maple arises first in a continuing growth ring and then from there. How much damage the infection does not know how far it is able to travel through the forest and roots depends. When it reaches old-growth timber, the infection is likely to be fatal. However, if it can not proceed beyond the first growth ring in other seasons' growth rings, the disease will go into remission and compartmentalize. If acute symptoms after one or more years back, with no signs of infection, it is the result of a new infection and not a continuation of the previous one.
Acute and chronic symptoms
Chronic symptoms of Verticillium wilt in maple is often somewhat less troubling than acute, severe symptoms such as slow, chronic infections are less likely to sudden wilting and death can. Increase in chronic infections, red maple leaves bad, yellow and signs such as leaf scorch, unusually heavy seed production and the death of shoots and twigs. Leaves may suddenly wilt and die. Acute infections are often more severe, producing leaf curling and drying unusually red or yellow leaves, some defoliation, wilting of leaves and branches in a whole section of a tree, a sudden death of the infected portions. The severe acute infections can quickly wither, die and total tree death.
Other causes of Wilting
While Verticillium wilt is often the first and most likely suspects in red maple wilt, other causes mimic some symptoms of Verticillium wilt. Maples weakened due to adverse environmental conditions and susceptible to herbicide and mechanical damage. Herbicide damage can cause leaf distortion and death. Maples are also prone to cause mechanical damage, providing an opening for a variety of diseases and pests, the leaf damage. Verticillium wilt, however, cause streaks in the wood similar to Dutch elm disease. Evaluate the tree carefully for the full range of symptoms.