Leaf spot is damage to the tissue of tree or shrub leaves. There multiple causes of leaf spot, including: fungus, bacteria, air pollution, insects or weather. The damaged leaf will begin to exhibit spots, ranging in size from a pin-head to the entire leaf and in color from tan, brown, black or red (usually surrounded by a different color border). The tree or shrub may start to lose some or most of it's leaves.
Favorable conditions include cool, wet weather; the disease spreads as spores are dispersed through rain, wind, mechanical means or insects. Although the leaves look unsightly, leaf spot usually does not cause dieback on healthy trees; though trees that are under stress may have dieback after leaf spot becomes a problem.
If leaf spot is a continuous problem, a fungicide may be warranted. This product must be applied in early spring when the fungus is becoming active.
If you believe your trees or shrubs have been affected with disease or fungus activity, call Grounds Services today for a no-obligations visit at 419-536-4344.