Most important winter wheat diseases in Zemgale region
2001
Bankina, B. (Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Dept. of Plant Protection) | Priekule, I.
Diseases of wheat cause important losses of yield in Latvia. The detection of a disease, assessment of incidence and severity of diseases is the main task for the present. Field experiments were carried out on cultivated sandy clay loam, lessive brown soils of the Research and Training Farm "Peterlauki" of Latvia University of Agriculture. The development of diseases was assessed on fourteen winter wheat varieties. Tan spot (Drechslera tritici-repentis), leaf blotch (Septoria tritici), and glume blotch (Septoria nodorum) have been the most important wheat diseases in Latvia during last five years. The incidence of tan spot was about 100% and severity 16 to 70% (depending on the variety) on the top leave at the time of milk ripening in 1998, 100% and 1 to 5% in 1999, 100% and 4 to 18% in 2000, respectively. Mildew (Erysiphe graminis) was not detected in "Peterlauki" in 1998; the severity of mildew was low, only 1 to 5% in 1999 and 2000. Brown and yellow rusts (Puccinia tritici, Puccinia striiformis) were detected rather seldom, and the incidence mainly depend on the crop variety.
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