Diseases Found in Trees and Plants

Like animals, plants have different types of diseases as well. These diseases are seldom seen by humans because the disease causing organisms are microscopic. Plant diseases can affect any part of a tree or the whole tree, and become apparent on the tree once the disease takes hold of its host. Trees diseases are often named after the damage that they produce. Manifestation of certain disease may appear as: leaf rust, fire blight, and powdery mildew.

A common plant disease that most of us have seen is leaf rust. Leaf rust is brown with yellow splotches on leaves. Even if this disease rarely kills plants, it turns them unsightly and cripples the by plant by interfering with photosynthesis. The solution for the tree to fix the problem is to shed its leaves in autumn.

Fire blight changes the appearance of trees to seem as if they were scorched by fire. Leaves of some twigs wither and turn black or brown. The bacteria causing fire blight is particularly active in warm, moist weather. Elements such as rain and infected pruning tools provide transportation for the disease to move. The best way you can treat trees from fire blight is to disinfect pruning tools, then prune said spots on the trees.

A white coating that forms on leaf surfaces during dry, cloudy weather with high humidity is called powdery mildew. Several fungi can cause this disease, with plants that grow in shaded areas being most affected. Leaves are covered with a thin layer or irregular patches with a powdery, grayish-white material. Leaves may become distorted. Infected leaves may turn yellow or red and drop. In late fall tiny black dots are scattered over the white patches like grains of pepper.

Not all diseases will kill plants and trees. However, it may hinder the growth and affect the look of the trees. If there is a concern relating tree diseases, and especially trees affected by diseases that may inflict property damage, call Miller’s Tree Service for a free consultation with one of our certified arborists.