Plasmopara halstedii

Plasmopara halstedii
Scientific classification
Domain: Eukaryota
Kingdom: Chromalveolata
Phylum: Heterokontophyta
Class: Oomycetes
Subclass: Incertae sedis
Order: Peronosporales
Family: Peronosporaceae
Genus: Plasmopara
Species: P. halstedii
Binomial name
Plasmopara halstedii
(Farl.) Berl. & De Toni, (1888)
Synonyms

Peronospora halstedii Farl., (1882)
Plasmopara helianthi Novot., (1962)

Plasmopara halstedii is a plant pathogen infecting sunflowers. The species is one of many pathogens commonly referred to as downy mildew.[1] P. halstedii originated in North America.

P. halstedii oospores produce a thin wall which are resistant structures, sexually produced that are essential for its continuation. After entering an area, the eradication of the pathogen is difficult due to the formation of oospores, which can remain viable in soil for many years.[2]

Detection

Systemically infected sunflower plants may have some degree of stunting and the leaves show pale green or chlorotic mottling which spreads along the main veins and over the lamella.

External links

References

  1. ↑ Friskop, Andrew; Markell, Sam; Gulya, Tom (2009). "Downy Mildew of Sunflower" (PDF). Sunflower Publications. IPM Publications (Fargo, North Dakota: North Dakota State University Extension Service). Retrieved 4 March 2016.
  2. ↑ Maria Villas Bôas de Campos Leite, Regina; Assis Henning, Ademir; Rosa Rodrigues, Silvia; Fernandes de Oliveira, Marcelo (December 2007). "Detecção e variabilidade de Plasmopara halstedii no Brasil e avaliação da resistência de genótipos de girassol ao míldio" [Detection and variability of Plasmopara halstedii in Brazil and resistance of sunflower genotypes to downy mildew]. Summa Phytopathologica. ISSN 0100-5405.

Further reading


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