Polyscytalum

Polyscytalum
Scientific classification
Kingdom:	Fungi
Phylum:	Ascomycota
Class:	Ascomycetes
Order:	Incertae sedis
Family:	Incertae sedis
Genus:	Polyscytalum

The genus Polyscytalum is a group of fungi that is important for its role as a pathogen of potatoes.^[1]

Habitat

The usual habitat of Polyscytalum fungi is the colder and damper regions of Europe and Asia.^[2]

Disease

The fungus Polyscytalum pustulans (formerly known as Oosporia pustulans) can cause potato skin spot disease.^[1]^[3] The infection most often enters the potato plant through the lenticel at the base of the base of the stem.^[3] Once inside, the fungus will spread across the roots of the plant and infect any new potatoes the plant grows.^[1] The infection results in raised circular patches of rot on the potato tubers. These only appear after around 6-12 weeks of storage.^[3]^[1]

The disease is usually spread by planting infected potatoes in the ground. The fungus can also live in the soil for up to 5 years and then infect healthy potatoes directly from there.^[4]

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 Hide, G. A.; Ibrahim, Lioudmila (1994-03-01). "Infection of potato stem bases, stolons and tubers byPolyscytalum pustulans (Owen & Wakef.) Ellis and development of sclerotia". Potato Research. 37 (1): 35–42. doi:10.1007/BF02360430. ISSN 1871-4528.
↑ Nagdy, G. A.; Boyd, A. E. W. (1965-12-01). "Susceptibility of potato varieties to skin spot (Oospora pustulans) in relation to the structure of the skin and eye". European Potato Journal. 8 (4): 200–214. doi:10.1007/BF02364289. ISSN 1871-4528.
↑ ^3.0 ^3.1 ^3.2 Allen, J. D. (1957-06). "THE DEVELOPMENT OF POTATO SKIN‐SPOT DISEASE". Annals of Applied Biology. 45 (2): 293–298. doi:10.1111/j.1744-7348.1957.tb00469.x. ISSN 0003-4746. {{cite journal}}: Check date values in: |date= (help)
↑ Carnegie, S. F.; Cameron, A. M. (1990-09). "Occurrence of Polyscytalum pustulans, Phoma foveata and Fusarium solani var. coemleum in field soils in Scotland". Plant Pathology. 39 (3): 517–523. doi:10.1111/j.1365-3059.1990.tb02528.x. ISSN 0032-0862. {{cite journal}}: Check date values in: |date= (help)

[:0-1] 1.0 ^1.1 ^1.2 ^1.3 Hide, G. A.; Ibrahim, Lioudmila (1994-03-01). "Infection of potato stem bases, stolons and tubers byPolyscytalum pustulans (Owen & Wakef.) Ellis and development of sclerotia". Potato Research. 37 (1): 35–42. doi:10.1007/BF02360430. ISSN 1871-4528.

[2] Nagdy, G. A.; Boyd, A. E. W. (1965-12-01). "Susceptibility of potato varieties to skin spot (Oospora pustulans) in relation to the structure of the skin and eye". European Potato Journal. 8 (4): 200–214. doi:10.1007/BF02364289. ISSN 1871-4528.

[:1-3] 3.0 ^3.1 ^3.2 Allen, J. D. (1957-06). "THE DEVELOPMENT OF POTATO SKIN‐SPOT DISEASE". Annals of Applied Biology. 45 (2): 293–298. doi:10.1111/j.1744-7348.1957.tb00469.x. ISSN 0003-4746. {{cite journal}}: Check date values in: |date= (help)

[4] Carnegie, S. F.; Cameron, A. M. (1990-09). "Occurrence of Polyscytalum pustulans, Phoma foveata and Fusarium solani var. coemleum in field soils in Scotland". Plant Pathology. 39 (3): 517–523. doi:10.1111/j.1365-3059.1990.tb02528.x. ISSN 0032-0862. {{cite journal}}: Check date values in: |date= (help)

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