Fungi from lesions on the stem base of winter wheat: variation in space and time | Champignons associes aux lesions de la base des tiges du ble d'automne: variation dans l'espace et dans le temps
2004
Gindrat, D. | Frei, P.,Agroscope RAC Changins, Station federale de recherches agronomiques, Nyon (Switzerland)
Fungi were isolated from lesions on the stem base of winter wheat between BBCH 30 and 79 during several years in four regions of Western Switzerland. Pseudocercosporella herpotrichoides (eyespot) was scarcely isolated before BBCH 32. The uselessness of an early visual diagnose to predict eyespot was confirmed. P. herpotrichoides occurred mainly in an altitude region and in Changins and was almost absent in peat soils and in areas exposed to cold air lakes. P. herpotrichoides was less frequently isolated these last years than during the 1989-1995 period. Rhizoctonia cerealis was common at all wheat growth stages from 1989 on, but its occurrence also decreased later. Other dominant fungi in 1996-2002 were: Microdochium (= Fusarium) nivale, Stagonospora (= Septoria) nodorum, Bipolaris sorokiniana and Fusarium spp. (mostly F. graminearum and F. culmorum).
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