Sensitivity of Mycosphaerella graminicola isolates to demethylation-inhibiting (DMI) fungicides

Ronis, Antanas; Jørgensen, Lise Nistrup; Semaškienė, Roma; Gaurilčikienė, Irena; Ramanauskienė, Jūratė

doi:10.13080/z-a.2014.101.023

Cited by 7 publications

(9 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Rhynchosporium commune) and ramularia leaf spot (RLS, caused by Ramularia collocygni), are the most common leaf blotch diseases of barley in the Nordic-Baltic countries. The incidence and severity of these foliar diseases vary between years and countries, and between regions within countries (Jalli et al 2011;Ronis et al 2014;Ficke et al 2018b;Jørgensen et al 2018). The variation in occurrence of plant diseases is usually explained by differences in climatic conditions, synchronization between pathogen arrival and the growth stage of the host crop, cultivation history, host plant resistance and agricultural practices (Shaner 1981;Hosford et al 1987;Riaz et al 1991;Hardwick et al 2001;Oerke 2006;Jørgensen and Olsen 2007;Shaw et al 2008;Wiik and Ewaldz 2009).…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

Self Cite

View full text Add to dashboard Cite

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.

show abstract

Section: Introductionmentioning

confidence: 99%

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

et al. 2020

Self Cite

View full text Add to dashboard Cite

show abstract

“…The increasing of thousand grain weight by 1 g due to fungicide treatment just before/ during heading increased the yield by approximately 2000 kg ha -1 (Wiik, 2009). In other study, Ronis et al (2014) obtained an increase in thousand grain weight from 0.70 to 5.88 g compared to the grain weight in untreated plots. The results of experiments show that the increase in grain yield depended on fungicide group and even on active ingredients of a fungicide.…”

Section: Decision-support Systemsmentioning

confidence: 66%

“…For example, in Argentina, the grain yield increase per day under fungicide treatment containing triazole+strobilurin+carboxamide (fluxapyroxad) was 34.2 kg ha -1 day -1 , under fungicide treatment containing triazole+strobilurin-from 18.1 to 34.2 kg ha -1 day -1 , and without fungicide treatment -only 10.1 kg ha -1 day -1 . In Lithuania, a single epoxyconazole application increased the grain yield from 0.31 to 1.77 t ha -1 , but prothioconazole application increased the grain yield from 0.22 to 0.94 t ha -1 (Ronis et al, 2014).…”

Section: Decision-support Systemsmentioning

confidence: 93%

Winter wheat leaf diseases and several steps included in their integrated control: A review

Svarta¹,

Bimšteine²

2019

Research for Rural Development

View full text Add to dashboard Cite

Winter wheat (Triticum aestivum L.) leaf diseases is an important risk factor that influences the productivity and quality of wheat production. The aim of the present study was to review published scientific literature about the possibilities for integrated control of winter wheat leaf diseases. The most common and economically important wheat leaf diseases are Septoria leaf blotch (caused by Zymoseptoria tritici), tan spot (caused by Pyrenophora triticirepentis), yellow rust (caused by Puccinia striiformis), and powdery mildew (caused by Blumeria graminis). The severity of winter wheat diseases has varied significantly over the years and depended on meteorological conditions, variety resistance to pathogen, and tillage system. The crop rotation and an efficient residue management significantly decrease the development of tan spot. The development of Septoria leaf blotch mainly depends on meteorological conditions, but agronomic practice is less important. The use of disease-resistant varieties is the most economical, safe, and effective way to prevent and control wheat leaf diseases. Many European countries have a number of decision support systems for optimizing and minimizing the use of fungicides. Decision support systems are based on control thresholds and meteorological observations. Most used parameters are: air temperature, relative air humidity, and precipitation. These systems have been developed in the countries with a milder climate and a longer vegetation period than Latvia, and systems need to be adapted to Latvian conditions. The main groups of fungicides for disease control in winter wheat are azoles, strobilurin, and carboxamides. The results of many studies about the effectiveness of fungicide groups show that the obtained results differ and further research is needed.

show abstract

“…The first research project, aiming to evaluate the sensitivity levels of Z. tritici to DMI fungicides in Lithuania was by Ronis et al., 2014 . Subsequently, studies performed by researchers from Denmark ( Wieczorek et al., 2015 ; Heick et al., 2017 ) and Estonia ( Mäe et al., 2020 ) included few samples from Lithuania in their studies.…”

Section: Discussionmentioning

confidence: 99%

“…DMI fungicides have been used for almost 40 years in Lithuania, where they are essential fungicides for STB control, as in the rest of Europe. Ronis et al. (2014) reported a decline in sensitivity of the Lithuanian Z. tritici population to DMI fungicides epoxiconazole and cyproconazole between 2009 and 2011.…”

Section: Discussionmentioning

confidence: 99%

Fungicide sensitivity levels in the Lithuanian Zymoseptoria tritici population in 2021

Lavrukaitė

Heick²,

Ramanauskienė³

et al. 2023

Front. Plant Sci.

Self Cite

View full text Add to dashboard Cite

Zymoseptoria tritici causes the disease known as septoria leaf blotch in winter wheat and is a major factor in yield loss worldwide. Farmers are inclined to use fungicides to protect their crops; however, the efficacy of these measures is rapidly decreasing due to the natural mechanisms of mutation emergence in pathogen populations. Increasing fungicide resistance is being recorded worldwide, therefore, screening of the current situation in Lithuania is essential to determine the subsequent steps of crop protection strategies. In this study, in vitro fungicide sensitivity tests, mutation detection, and field experiments were carried out. The mean EC50 values for prothioconazole-desthio and mefentrifluconazole were 0.14 and 0.28 mg/l, respectively. Increased frequency of the mutation S524T, linked to DMIs resistance, was observed. Results revealed that the dominant point mutation in the gene CYP51 was I381V, and the most frequent CYP51 haplotype was D13 (V136C, I381V, Y461H, S524T). The mutation G143A, linked to QoI resistance, was detected in ¾ of the population. Mutations conferring resistance to SDHIs were not detected in single pycnidium isolates. Two-year field experiments likewise showed no decline in field efficacy of SDHI fungicide in Lithuania. Moreover, the baseline sensitivity of the Lithuanian Z. tritici population to QiI fungicide fenpicoxamid was established. The findings of this study provide an update on the current status of fungicide resistance in the Lithuanian Z. tritici population.

show abstract

Sensitivity of Mycosphaerella graminicola isolates to demethylation-inhibiting (DMI) fungicides

Cited by 7 publications

References 18 publications

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

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

Winter wheat leaf diseases and several steps included in their integrated control: A review

Fungicide sensitivity levels in the Lithuanian Zymoseptoria tritici population in 2021

Contact Info

Product

Resources

About