QuietMatch

Black Knot

Disease of wild and cultivated plums, cherries, and apricots in North America caused by the fungus Dibotryon morbosum. Infected twigs, branches, and fruit show light brown swellings that turn velvety olive-green in late spring. By autumn, hard, rough, coal-black knots girdle and kill affected parts. Older knots, often riddled by insects, stunt and kill the tree. Black knot

posted by QuietMatch @ 11:47 PM