||Other trees look safe, but have a weak root system. Always check for root decay when making a hazard tree inspection.
||Armillaria root rots
||This is shoestring root rot. Named for the black bands that the fungus produces under dead bark, shoestring root rot often attacks weakened trees. Keep your trees healthy and vigorous through a well designed program of tree care.
||root lifting, soil heaving, and windthrow
||or changing the grade and moisture content of sites can cause major problems for trees. Consider the consequences before the work begins.