Peyronellaea curtisii explained

Peyronellaea curtisii (leaf scorch) is a fungal plant pathogen first described by Miles Joseph Berkeley and received its current name in 2010.[1] Formerly it was Stagonospora (syn. Stagonosporopsis) curtisii.[2] It is a cause of leaf blotch, and its substrates include Narcissus, Galanthus and Hippeastrum.[3]

Symptoms

Peyronellaea curtisii causes red-brown spots on leaf tips of Narcissus[4] and other members of the family Amaryllidaceae; this gives them a scorched appearance that is easily mistaken for frost damage. A yellowish discolouration then spreads down the leaf; more spots may develop as the leaf withers, turns brown and die away. Minute black fungal fruiting bodies may be visible on the foliage. The flowers and flower stalks may also display brown spots and marks.[5]

On hippeastrum bulbs the fungus causes red spots that may develop into soft, sunken patches. Leaf scorch fungus can also affect other members of the Amaryllidaceae, including Amaryllis, Crinum, Nerine, Sprekelia and Sternbergia.[6]

Notes and References

  1. Aveskamp. M.M.. de Gruyter. J.. Woudenberg. J.H.C.. Verkley. G.J.M.. Crous. P.W.. Highlights of the Didymellaceae: A polyphasic approach to characterise Phoma and related pleosporalean genera. Studies in Mycology. 2010. 65. 1–60. 10.3114/sim.2010.65.01. 2836210. 20502538.
  2. https://www.rhs.org.uk/advice/profile?PID=735 RHS:Narcissus leaf scorch
  3. http://www.invasive.org/browse/subinfo.cfm?sub=60300 Invasive.org
  4. Web site: McCain, A.; Pyeatt, L.; Pierce, L. Leaf scorch of Narcissus. California Plant Pathology 1980 No. 50 pp. 1-2 . 2014-11-21 . https://web.archive.org/web/20141129150221/http://hortscans.ces.ncsu.edu/library/floriculture/doc_id/276/Protea-Nursery-Production-Trial.pdf . 2014-11-29 . dead .
  5. https://www.rhs.org.uk/advice/profile?PID=735 RHS:Narcissus leaf scorch
  6. https://www.rhs.org.uk/advice/profile?PID=735 RHS:Narcissus leaf scorch