As with all vegetation, damage to boxwoods also occurs from disease as well as weather. In some cases, winter injury can be confused with blight. This occurs typically on winters with little to no snow. The only part of the boxwood that survives is the area where snow protected the foliage from cold harsh winds. There is also insect related damage that can occur on boxwoods such as leafminers. These are small larva that live and feed inside the leaf of the boxwood making it seem yellow and smaller than the rest of the leaves.