Mysterious Brown Circles Appearing on Box Hedging

I wanted to share with you a problem someone was having with their box hedging that surrounds a lawn area. Brown circular patches were appearing on the grass side of the hedge and were all at roughly the same height. The owner’s Labrador was being accused of causing the damage so I was pleased to be able to exonerate the dog of all blame. The problem is a result of the hot exhaust on a lawnmower. This is not normally an issue if the gardener keeps moving along the hedge when cutting the grass. The damage is done when the…