The bark on a neighbor's maple turned black and several branches of the tree died (Leaves were dry). I investigated because I have a maple tree about 15 feet from the distressed tree. The bark at the bottom of the distressed tree just fell off in my hands, and there were loads of earwigs. About half the bark around the tree's diameter from ground level to about 2 feet up is very loose and easily pulled off. There is a material like sawdust down on the ground, and underneath the loose bark the tree is very dry. Is it the mold or the earwigs causing the problem? And how do I prevent that problem from spreading to my nearby Maple?