TY - JOUR

T1 - Yield increases due to fungicide control of leaf blotch diseases in wheat and barley as a basis for IPM decision-making in the Nordic-Baltic region

AU - Jalli, Marja

AU - Kaseva, Janne

AU - Andersson, Björn

AU - Ficke, Andrea

AU - Nistrup-Jørgensen, Lise

AU - Ronis, Antanas

AU - Kaukoranta, Timo

AU - Ørum, Jens Erik

AU - Djurle, Annika

N1 - Funding Information: This research has been carried out as a part of the SpotIT (IT-solutions for user friendly IPM-tools in management of leaf spot diseases in cereals) project ( https://www.nibio.no/en/projects/spotit ) funded under the C-IPM ERA-NET. The authors thank all the project partners and the national funding organizations: Finnish Ministry of Agriculture and Forestry, Danish AgriFish Agency, Lithuanian Research Center for Agriculture and Forestry, Norwegian Research Council, and Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning. Funding Information: This research has been carried out as a part of the SpotIT (IT-solutions for user friendly IPM-tools in management of leaf spot diseases in cereals) project (https://www.nibio.no/en/projects/spotit) funded under the C-IPM ERA-NET. The authors thank all the project partners and the national funding organizations: Finnish Ministry of Agriculture and Forestry, Danish AgriFish Agency, Lithuanian Research Center for Agriculture and Forestry, Norwegian Research Council, and Swedish Research Council for Environment, Agricultural Sciences and Spatial Planning. Publisher Copyright: © 2020, The Author(s).

PY - 2020

Y1 - 2020

N2 - Fungal plant diseases driven by weather factors are common in European wheat and barley crops. Among these, septoria tritici blotch (Zymoseptoria tritici), tan spot (Pyrenophora tritici-repentis), and stagonospora nodorum blotch (Parastagonospora nodorum) are common in the Nordic-Baltic region at variable incidence and severity both in spring and winter wheat fields. In spring barley, net blotch (Pyrenophora teres), scald (Rhynchosporium graminicola, syn. Rhynchosporium commune) and ramularia leaf spot (Ramularia collo-cygni) are common yield limiting foliar diseases. We analysed data from 449 field trials from 2007 to 2017 in wheat and barley crops in the Nordic-Baltic region and explored the differences in severity of leaf blotch diseases between countries and years, and the impact of the diseases on yield. In the experiments, septoria tritici blotch dominated in winter wheat in Denmark and southern Sweden; while in Lithuania, both septoria tritici blotch and tan spot were common. In spring wheat, stagonospora nodorum blotch dominated in Norway and tan spot in Finland. Net blotch and ramularia leaf blotch were the most severe barley diseases over large areas, while scald occurred more locally and had less yield impact in all countries. Leaf blotch diseases, with severity '50% at DC 73–77, caused an average yield loss of 1072 kg/ha in winter wheat and 1114 kg/ha in spring barley across all countries over 5 years. These data verify a large regional and yearly variation in disease severity, distribution and impact on yield, emphasizing the need to adapt fungicide applications to the actual need based on locally adapted risk assessment systems.

AB - Fungal plant diseases driven by weather factors are common in European wheat and barley crops. Among these, septoria tritici blotch (Zymoseptoria tritici), tan spot (Pyrenophora tritici-repentis), and stagonospora nodorum blotch (Parastagonospora nodorum) are common in the Nordic-Baltic region at variable incidence and severity both in spring and winter wheat fields. In spring barley, net blotch (Pyrenophora teres), scald (Rhynchosporium graminicola, syn. Rhynchosporium commune) and ramularia leaf spot (Ramularia collo-cygni) are common yield limiting foliar diseases. We analysed data from 449 field trials from 2007 to 2017 in wheat and barley crops in the Nordic-Baltic region and explored the differences in severity of leaf blotch diseases between countries and years, and the impact of the diseases on yield. In the experiments, septoria tritici blotch dominated in winter wheat in Denmark and southern Sweden; while in Lithuania, both septoria tritici blotch and tan spot were common. In spring wheat, stagonospora nodorum blotch dominated in Norway and tan spot in Finland. Net blotch and ramularia leaf blotch were the most severe barley diseases over large areas, while scald occurred more locally and had less yield impact in all countries. Leaf blotch diseases, with severity '50% at DC 73–77, caused an average yield loss of 1072 kg/ha in winter wheat and 1114 kg/ha in spring barley across all countries over 5 years. These data verify a large regional and yearly variation in disease severity, distribution and impact on yield, emphasizing the need to adapt fungicide applications to the actual need based on locally adapted risk assessment systems.

KW - IPM

KW - Parastagonospora nodorum

KW - Pyrenophora teres

KW - Pyrenophora tritici-repentis

KW - Ramularia collo-cygni

KW - Rhynchosporium graminicola

KW - Risk assessment

KW - Yield loss Zymoseptoria tritici

U2 - 10.1007/s10658-020-02075-w

DO - 10.1007/s10658-020-02075-w

M3 - Journal article

AN - SCOPUS:85087332570

VL - 158

SP - 315

EP - 333

JO - European Journal of Plant Pathology

JF - European Journal of Plant Pathology

SN - 0929-1873

IS - 2

ER -