Spring wheat leaf diseases development depending on agrotechnical measures | Vasaras kviešu lapu slimību attīstība atkarībā no agrotehniskajiem paņēmieniem
2015
Bankina, B., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Inst. of Soil and Plant Sciences | Bimsteine, G., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Inst. of Soil and Plant Sciences | Ruza, A., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Inst. of Agrobiotechnology | Kreita, D., Latvia Univ. of Agriculture, Platone parish, Jelgava municipality (Latvia). Study and Research Farm Peterlauki | Katamadze, M., Latvia Univ. of Agriculture, Platone parish, Jelgava municipality (Latvia). Study and Research Farm Peterlauki | Neusa-Luca, I., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture. Inst. of Soil and Plant Sciences
Reduced soil tillage and wheat monoculture have become increasingly widespread technologies in Latvia, but consequences of these technologies are unclear. The aim of the present research was to estimate the importance of different agronomic measures on the development of the wheat leaf diseases. Two–factor experiments were carried out in 2014 at the Study and Research Farm „Pēterlauki”: 1) crop rotation, and 2) soil management. The incidence and severity of diseases were estimated every week starting from stem elongation till ripening, the area under disease progress curve was calculated. Tan spot (caused by Pyrenophora tritici-repentis) dominated during investigations, in addition, Septoria leaf blotch (caused by Zymoseptoria tritici) and mildew (caused by Blumeria graminis) were determined. Reduced soil tillage and especially the lack of crop rotation increased the development of tan spot. The first symptoms were more severe and the development of this disease was more intensive in continuous wheat sowings under reduced soil tillage. Severity of mildew was higher in variants with crop rotation and ploughing, but agronomic measures did not influence the development of Septoria leaf blotch. An epidemic risk of the wheat leaf disease is dependent on dominating pathogens and agronomic measures.
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