Importance of Agronomic Practice on the Control of Wheat Leaf Diseases

Biruta Bankina, Gunita Bimšteine, Irina Arhipova, Jānis Kaņeps and Terēze Stanka
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Biruta Bankina: Faculty of Agriculture, Latvia University of Life Sciences and Technologies, Jelgava, LV-3001, Latvia
Gunita Bimšteine: Faculty of Agriculture, Latvia University of Life Sciences and Technologies, Jelgava, LV-3001, Latvia
Irina Arhipova: Faculty of Information Technologies, Latvia University of Life Sciences and Technologies, Jelgava, LV-3001, Latvia
Jānis Kaņeps: Faculty of Agriculture, Latvia University of Life Sciences and Technologies, Jelgava, LV-3001, Latvia
Terēze Stanka: Faculty of Agriculture, Latvia University of Life Sciences and Technologies, Jelgava, LV-3001, Latvia

Agriculture, 2018, vol. 8, issue 4, 1-8

Abstract: Soil tillage and crop rotation are considered important tools in wheat leaf disease control; however, the results of investigations are inconsistent. The aim of the present study was to determine the effect of the soil tillage system and cropping sequence on the development of winter wheat leaf diseases in 2012–2017. The disease development was assessed in a two-factor experiment: (a) soil tillage system; and (b) crop rotation. Foliar fungicides were used uniformly in all variants. The results showed that tan spot (caused by Pyrenophora tritici-repentis ) dominated in 2012, 2013, and 2016, but the level of Septoria tritici blotch ( Zymoseptoria tritici ) was essentially lower and exceeded the severity of tan spot only in 2015. The agronomic practice used significantly influenced only the development of tan spot. Reduced soil tillage and continuous wheat sowing substantially increased tan spot severity, especially when both practices were used simultaneously. Short crop rotation (only wheat and oilseed rape) provided sufficient control of tan spot in ploughed fields, whereas in non-ploughed fields, the level of this disease did not decrease. The results could be explained by differences in the pathogens’ life cycle: P. tritici-repentis ascospores in wheat debris is the main source of infection; in contrast, Z . tritici spreads by conidia from living plants.

Keywords: reduced soil tillage; crop sequence; Pyrenophora tritici-repentis; Zymoseptoria tritici (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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