Development of winter wheat tan spot depending on fungicide treatment scheme | Kviešu lapu dzeltenplankumainības attīstība atkarībā no fungicīdu lietošanas shēmas
2021
Svarta, A., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Bimsteine, G., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture | Kaneps, J., Latvia Univ. of Life Sciences and Technologies, Jelgava (Latvia). Faculty of Agriculture
Wheat tan spot caused by Pyrenophora tritici-repentis is the most widespread winter wheat (Triticum aestivum) leaf disease in Latvia. The application of fungicides is the most common control measure. In general, one to three applications are used. The aim of the present research was to clarify the efficacy of different fungicide treatment schemes to control tan spot. Research was conducted at the Research and Study farm “Pēterlauki” (Latvia) of the Latvia University of Life Sciences and Technologies in 2018–2020. Four fungicide treatment schemes and an untreated control variant were used. The disease’s impact during the vegetation period was estimated by calculating the area under the disease progress curve (AUDPC). Intensity of fungicide treatment was analysed by treatment frequency index. The severity of tan spot differed significantly during all vegetation seasons. The development of tan spot was influenced significantly by fungicide application schemes (p is less than 0.001), but the efficacy was different.
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