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Wheat is (Triticum spp. )is the second important serial crop. Wheat is grown in a very wide range of climates, ranging from subtropical winter production to Scottisch 11 month long grown cool climate with its enormous productivity. Like all plant diseases, ones have aspects which are more historical and others which are mainly climate driven.  

Climatic driven diseases are: The rust diseases which are more important in the warmer climate zones are mainly climate driven diseases.  Fusarium head blight and its ability to form toxins is infuenced by the history of the field and by the climate situation too; it will not occure if the climate is not favourable for an infection during bloom. Also Septoria tritici is depending on splashing rains and long lasting leaf wetness to infect the canope and further on the corn. 

Diseases with historical aspects: Powdery mildew Blumeria graminis, which occurrs in a wide climatic range is mainly influenced by the history of an field. Pseudocercosporella herpotrichoides (Eyespot disease) , Gaeumannomyces graminis (Take- all, Schwarzbeinigkeit) and Rhizoctonia cerealis (Yellow batch)  are mostly depending on the history of the site and not much influenced by the climate.

The disease Pyricularia grisea is described in detail in Rice Diseases and here called Magnaporthe grisea (see below; after the sexual stage of the fungal pathogen):

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