List of Oomycetes of South Africa

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This is an alphabetical list of the oomycotal taxa recorded from South Africa.

Contents

A

Family: Albuginaceae [1]

Genus: Albugo

P

Genus: Peronospora

Family: Peronosporaceae [2]

Order: Peronosporales [2]

Genus: Pseudoperonospora

Family: Pythiaceae [4]

Genus: Pythium

S

Genus: Saprolegnia

Family: Saprolegniaceae [5]

Order: Saprolegniales [5]

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Leaf vegetable Plant leaves eaten as a vegetable

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<i>Pythium</i> Genus of single-celled organisms

Pythium is a genus of parasitic oomycetes. They were formerly classified as fungi. Most species are plant parasites, but Pythium insidiosum is an important pathogen of animals, causing pythiosis. The feet of the fungus gnat are frequently a vector for their transmission.

<i>Albugo candida</i> Species of single-celled organism

Albugo candida, commonly known as white rust, is a species of oomycete in the family Albuginaceae. It is sometimes called a fungus, but in fact forms part of a distinct lineage of fungus-like microorganisms, Oomycetes, commonly known as water moulds. A. candida is an obligate plant pathogen that infects Brassicaceae species and causes the disease known as white rust or white blister rust. It has a relatively smaller genome than other oomycetes.

<i>Peronospora</i> Genus of plant pathogen

Peronospora is a genus of oomycetes that are obligate plant pathogens of many eudicots. Most species in this group produce a downy mildew disease, which can cause severe damage to many different cultivated crops, as well as wild and ornamental plants. There are 19 genera that produce downy mildew, and Peronospora has been placed alongside Pseudoperonospora in the group of downy mildews with coloured conidia. Peronospora has far more species than any other genus of the downy mildews. However, many species have been moved from this genus to be reclassified to other or new genera. Among these was the most famous Peronospora species, formerly known as Peronospora parasitica, and now known as Hyaloperonospora parasitica. Now, the Peronospora species of most importance is likely the Peronospora tabacina. Peronospora tabacina causes blue mold on tobacco plants and can severely reduce yields of this economically important crop to the point where it has been classified as a bioweapon.

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