Septoria tritici

Carmi R, Carmeli S, Levy E, Gough FJ (1994) (-t)-(5)-Dihydroaeruginoic Acid, an Inhibitor of Septoria tritici and other Phytopathogenic Fungi and Bacteria, Produced by Pseudomonas fluorescens. J Nat Prod 57 1200... 

Producers thought they had found a total solution, but it became apparent that they had then created another problem. For example, wheat plant residues contain foliar pathogens such as Septoria tritici (8). The following season, spores are produced by these fungi and are blown to adjacent fields of wheat where severe infection may result. Mechanical tillage destroys the crop residue chemical fallow does not. So in solving one problem, another was... 

It is unfortunate, but not surprising, that a fungicide effective only against powdery mildew, such as ethirimol, allows other pathogens not sensitive to the fungicide to invade the unaffected foliage. For example, where powdery mildew had been the primary problem, Septoria tritici and Puccinia recondita now Invaded the... 

Colletotrichum coccodes Fusarium lateritium Fusarium lateritium Septoria tritici Desm. f.sp. avenae... 

Keon J, Bailey A, Hargraves J. A group of expressed cDNA sequences from the wheat fungal leaf blotch pathogen Mycosphaerella graminicola (Septoria tritici). Fungal Genet Biol 29 113-118, 2000. 

However, in 2002, when G143A-based resistance was detected in Mycosphaerdla graminicola (anamorph Septoria tritici), only DMIs and chlorothalonil-based products were available to substitute Qols. Accordingly, because of the high economic importance of Septoria tritici in European wheat production, Qol applications dropped sharply after the rapid spread of this resistance in the years 2003 and 2004. 

Fortunately, already within the currently known examples, important differences in the dynamics of resistance spread and concurrently in the practical consequences can be found. Worst-case examples, represented by pathogens such as cereal powdery mildew or Septoria tritici, are characterized by a rapid spread of resistance within the fungal population over continent-wide distances but are obviously rare. In other cases such as with the apple scab pathogen (Venturia inaequalis), problems remain localized to certain regions or even individual orchards for many years and give a good chance for consequent resistance management. 

Succinate Dehydrogenase Determines Resistance to Carboxin in Mycosphaerdla graminicola (Septoria tritici), Curr. Genet., 1998, 34, 393-398. 

The environment. Each pathogen has specific requirements (temperature, moisture/rainfall and hrrrrridity) for infection, colonisation, reproduction arrd spread. Because of the environmental differences across the cormtry, disease incidence is often different. For example there is a much higher risk of septoria tritici in the west in wheat and of yellow rast in the east of England and Wales (Fig. 6.1). 

Glume blotch has a similar life cycle as Septoria tritici but the fungus can also be carried on the seed. The disease develops rapidly in warm weather if there is high humidity. Symptoms develop 10-14 days after an infection period. 

Oats Leaf spot, seedling blight Septoria tritici) Pyrenophora avenae... 

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