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Fungal group. Uredinales. Basidiomycetes.


Approx. 14 families, 105 genera and 5,000 species.

Where Found

Grasses, flowers, trees and other living plant materials.

Mode of Dissemination

Rusts have both wet and dry spores. Wind disperses the urediospores, teliospores, basidiospores, and aeciospores. The basidiospores and aeciospores have an active spore release mechanism.


Type I allergies (hay fever, asthma).

Potential Opportunist or Pathogen

No reports of human infection.

Potential Toxin Production

Not known.

Growth Indoors

Rusts do not grow indoors unless their host plants are present. They are parasitic plant pathogens and need a living host for growth.

Industrial Uses

Not known.

Other Comments

Rusts are members of the Basidiomycetes class. They have a complex life cycle, producing five different spore types in two different plant hosts. Spore types include: basidiospores, pycniospores, aeciospores, urediospores, and teliospores.

Used with permission from EMLab P&K

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