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]]