Synonyms: Aecidium candidum, Albugo capparidis, Albugo cruciferarum, Albugo macrospora, Albugo mauginii, Cystopus candidus, Uredo candida, Uredo cruciferarum.
Common name: white rust of crucifers.
Extract from Wikipedia article: 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.
Belarusian: Цыстопус белы, Egyptian Arabic: كانديدا البوجو, Welsh: Pothelli gwynion bresych.
Albugo candida is a parasitic fungus that infects plants, particularly those in the Brassica family. In East and Central Texas, it has been found to infect various hosts, including wild mustard, shepherd's purse, and cruciferous crops. The fungus produces white, blister-like lesions on the leaves and stems of infected plants, which can lead to reduced growth and yield. It is commonly associated with moist environments and is often found in low-lying areas, such as creek bottoms and irrigated fields.
Swelling of a stem of tansy mustard (Descurainia pinnata) caused by white rust fungus of crucifers (Albugo candida) at Lake Somerville Trailway under oaks near Flag Pond, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
Colvin, Lee County, Texas, United States
Sharp bend of a stem of tansy mustard (Descurainia pinnata) caused by white rust fungus of crucifers (Albugo candida) at Lake Somerville Trailway under oaks near Flag Pond, near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023Colvin, Lee County, Texas, United States
Spores (in lactofenol blue) of white rust fungus of crucifers (Albugo candida) from tansy mustard, collected near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
Spores and mycelium (in lugol) of white rust fungus of crucifers (Albugo candida) from tansy mustard, collected near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
Spores (in lugol) of white rust fungus of crucifers (Albugo candida) from tansy mustard, collected near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
Spores and mycelium (in lugol, with x40 objective) of white rust fungus of crucifers (Albugo candida) from tansy mustard, collected near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023
Spores (in lugol, with x100 objective) of white rust fungus of crucifers (Albugo candida) from tansy mustard, collected near Nails Creek Unit of Somerville Lake State Park. Texas, March 8, 2023Observations of Albugo candida in East and Central Texas revealed distinct effects on the host plant, tansy mustard (Descurainia pinnata). The fungus caused noticeable swelling and sharp bends in the stems of infected plants, observed at Lake Somerville Trailway near Flag Pond. Microscopic examination of spores and mycelium from infected tansy mustard revealed characteristic features of Albugo candida. Spores were observed in lactofenol blue and lugol preparations, with detailed views obtained using x40 and x100 objectives. The presence of mycelium was also confirmed in lugol preparations. These observations provide insight into the morphology and effects of Albugo candida on its host plant in East and Central Texas. The fungus's impact on tansy mustard is evident, with notable alterations to stem shape and structure.
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