Manganese tarnishes slowly in air and oxidizes ("rusts") like iron in water containing dissolved oxygen. Its uses include control of downy mildews, rusts, and redfire disease. The plant has some susceptibility to leaf spots, blights, rusts and canker. The basidospore family include mushrooms, rusts, smuts, brackets, and puffballs. Common herb diseases are&colon; botrytis, mildew, viruses, rusts, and root disease. Basidiocarps are characteristic of the hymenomycetes; rusts and smuts do not produce such structures. The phylum "Basidiomycota" can be divided into three major lineages&colon; mushrooms, rusts and smuts. Teliospores are special kind of chlamydospores formed by rusts and smuts. Other diseases are given by mushrooms, fungal rusts, bacteria and insects. Leaf rusts and fireblight are among the many foliage diseases to affect this species. Paint finishes are for both steel and aluminum furniture, although it easily scratches and rusts. All species in this genus are obligate plant pathogens and are known as rusts. Rusts are considered among the most harmful pathogens to agriculture, horticulture and forestry. Unprotected carbon steel rusts readily when exposed to a combination of air and moisture. Cast iron is a porous material that rusts easily.