Development of wheat leaf diseases depending on fungicide application schemes | Kviešu lapu slimību attīstība atkarībā no fungicīdu smidzināšanas shēmas
2018
Bankina, B., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Stanka, T., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Grickevica, K., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture
Tan spot, caused by Pyrenophora tritici-repentis, septoria leaf blotch caused by Zymoseptoria tritici, and mildew caused by Blumeria graminis are the most harmful wheat leaf diseases. The choice of a proper fungicide treatment scheme is one of the most challenging issues for wheat growing. The aim of this study was to evaluate the development of wheat leaf diseases depending on fungicide treatment. A two-factorial field experiment (A – fungicide treatment (five schemes); B – the level of nitrogen fertilization (four levels)) with four replications was carried out. This paper demonstrates results of the fungicide treatment when nitrogen rate was 180 kg haE-1. Disease development during the whole vegetation season was evaluated by calculating the area under the disease progress curve (AUDPC), and the one-factor dispersion analysis was used to determine the significance of data. Each scheme of fungicide treatment essentially decreased the level of tan spot (which was the most important wheat disease in the present study), but the efficacy was different. Further investigations are required as the summer of investigation period was extremely dry, and the pressure of diseases was low.
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