Septoria tritici
5841036
202805852
2008-04-02T14:30:30Z
134.245.87.106
{{Taxobox | name = Septoria leaf blotch
| image = Septoria-tritici.jpg
|image_width = thumb
| regnum = [[Fungi]]
| divisio = [[Ascomycota]]
| familia = [[Mycosphaerellaceae]]
| genus = ''[[Septoria]]''
| species = '''''S. tritici'''''
| binomial = ''Septoria tritici''
| binomial_authority = Roberge
}}
'''''Septoria tritici''''' is the causal agent of ''S. tritici'' leaf blotch, a foliar disease of [[wheat]], and occasionally infects other [[grasses]] including [[barley]]. It is found in all wheat growing areas of the world<ref name="Smith I M, Dunez J, Lelliot R A, Phillips D H, Archer S A">{{cite book
|title=European handbook of Plant Diseases
|publisher = Blackwell Scientific Publications
|date=1988}}</ref>
and is the major disease of wheat in the UK.<ref name="UK Pest Disease and Weed reports">
{{cite web
|url=http://websrv1/about_pesticides.asp?id=861
|title=UK pest disease and weed incidence reports 1998-2005
|author=ADAS}}</ref>
<br/>
The [[teleomorph]] is ''Mycosphaerella graminicola'' (Fuckel) Schröter
==Morphology==
'''Asexual state:''' Pycnidiospores are hyaline and threadlike and measure 1.7-3.4 x 39-86 μm, with 3 to 7 indistinct septations. Germiniation of pycnidiospores can be lateral or terminal. Cirrhi are milky white to buff. Sometimes in culture nonseptate, hyaline microspores, measuring 1-1.3 x 5-9 μm, occur outside pycnidia by yeastlike budding.<ref name=WheatCompendium>
{{cite book
| last = Wiese
| first = M.V.
| title = Compendium of wheat diseases
| publisher = American Phytopathological Society
| date = 1987
| pages = 124
}}
</ref>
'''Sexual state:''' Perithecia are subepidermal, globose, dark brown, and 68-114 μm in diameter. Asci measure 11-14 x 30-40 μm. Ascospores are hyaline, elliptical, and 2.5-4 x 9-16 μm, with two cells of unequal length.<ref name=WheatCompendium>
{{cite book
| last = Wiese
| first = M.V.
| title = Compendium of wheat diseases
| publisher = American Phytopathological Society
| date = 1987
| pages = 124
}}
</ref>
==Epidemiology==
The period between infection and formation of sporulating structures (latent period) was estimated to be 20.35 ± 4.15 days for ''S. tritici'' and decreased with increasing temperature. <ref>Henze M, Beyer M, Klink H, Verreet J-A (2007): Characterizing meteorological scenarios favorable for ''Septoria tritici'' infections in wheat and estimation of latent periods. Plant Disease 91: 1445-1449. [http://apsjournals.apsnet.org/doi/abs/10.1094/PDIS-91-11-1445?journalCode=pdis]</ref>
==Sources==
*{{cite book
| last = van Ginkel
| first = M.
| coauthors = A. McNab, J. Krupinsky
| title = Septoria and stagonospora diseases of cereals: A compilation of global research
| publisher = CIMMYT
| date = 1999
| pages = 186pp
| url = http://www.cimmyt.org/Research/Wheat/pdf/Septoria/septoria.pdf
}}
==References==
<div class="references-small">
<references/>
{{agri-stub}}
{{Ascomycetes-stub}}
{{plant-disease-stub}}
[[Category:Plant pathogens and diseases]]
[[Category:Septoria]]
[[Category:Cereal diseases]]
[[Category:Wheat diseases]]
[[fr:Septoria tritici]]