A. parasiticus

Produces Aflatoxin. Highly toxic.

A. Niger

Not known to produce toxins. Can cause respiratory problems.

A. fumigatus

Not known to produce toxins. Can cause respiratory problems.

A. species (other)

Some useful functions and products. Harmful in large doses.

Alternaria

Common Genus. Problem when ingested or inhaled in large doses.

Aspergillus flavus

Produces Aflatoxin. Highly toxic.

Cladosporium

Common Genus. Not considered a significant problem.

Fusarium (Giberella)

Produces Vomitoxin (DON), T-2 Toxin, Zearalenone, Fumonisim. Toxins called Tricothecenes. All act to decrease feed intake and impair general health.

Geotrichum

Common Genus. Many characteristics resembling yeast.

Monascus

Stain silage dark red. Not considered a significant problem.

Mucor

Common Genus. Problem when ingested or inhaled in large doses.

Paecilomyus

Common Genus. Not considered a significant problem.

Penicillium species

Produces Patulin, Citrinin, Rubratoxin and Ochratoxin. Penicillium species are very common. Seldom causes problems except at high doses.

Rhizopus

Common Genus. Problem when ingested or inhaled in large doses.

Scopulariopsis

Common Genus. Not considered a significant problem.

Trichoderma

Produces Trichodermin. Not considered a significant problem.

Verticillium

Pathogenic to some plants, but has no known effect on animals.