Variety resistance to Cercospora leaf spot and fungicide application as tools of integrated pest management in sugar beet cultivation – A German case study

Gummert, Annett; Ladewig, Erwin; Bürcky, K.; Märländer, Bernward

doi:10.1016/j.cropro.2015.02.024

Cited by 20 publications

(21 citation statements)

References 19 publications

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“…Varietal resistance against pathogens often comes along with a yield penalty in the absence of the disease ( Brown, 2002 ). This was also found in several studies with sugar beet (e.g., Miller et al, 1994 ; Mittler et al, 2004 ; Kaiser et al, 2010 ; Gummert et al, 2015 ). Breeding of resistant varieties with high yield performance even without or under low infection pressure is crucial for acceptance in commercial practice.…”

Section: Introductionsupporting

confidence: 79%

“…Two 3-year datasets from 2014–2016 (trial series 1) and 2009–2011 (trial series 2) at 45 and 49 environments (i.e., location × year), respectively, were analyzed. The 49 trials in series 2 were part of a bigger dataset analyzed earlier by Gummert et al (2015) . All trials were run according to the official guidelines for the implementation of agricultural variety trials ( BSA, 2000 ).…”

Section: Methodsmentioning

confidence: 99%

“…Even though fungicides were sprayed regularly, foliar diseases could occasionally occur. As the disease level remained rather low, the plots were considered as healthy ( Gummert et al, 2015 ).…”

Section: Methodsmentioning

confidence: 99%

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New Generation of Resistant Sugar Beet Varieties for Advanced Integrated Management of Cercospora Leaf Spot in Central Europe

et al. 2018

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Cercospora leaf spot (CLS) epidemics in sugar beet have been increasing in recent years causing higher use of fungicides. Concomitantly, the availability of effective fungicides is at risk because of resistance development in the fungus, the lack of new active ingredients as well as restrictive approval practices. A key option for an integrated management of CLS is cultivation of resistant varieties. Because of the yield penalty in resistant varieties, acceptance in commercial practice so far has been low. The aim of our study was to characterize recent sugar beet varieties registered in Germany in terms of resistance and tolerance to CLS and their value for integrated pest management. The genetic basis of CLS resistance in varieties is protected by intellectual property rights even after variety registration and not open to the public due to economic competition. To gain reliable data for cultivation, varieties have to be tested for their resistance traits under field conditions at varying levels of infection with Cercospora beticola. In collaboration with variety related stakeholders, 15 sugar beet varieties were tested in 49 field trials in Germany from 2014 to 2016 for their yield response to CLS. The trials were set up in a split-plot design with and without infection (i.e., with and without fungicide). The classification of varietal reaction to CLS is based on symptomatic leaf area (susceptibility) and the resulting relative yield loss (tolerance). Since the relation between both parameters varied among varieties, it was used as an additional parameter to describe tolerance. On this basis, three groups of varieties were identified. They can be characterized as a susceptible, a resistant and a presumably tolerant cluster. A comparison of the data with an older dataset originating from 2009 to 2011 revealed that yield performance of recent varieties with resistance to C. beticola caught up with susceptible varieties due to breeding progress. They showed no yield penalty in the absence of the disease and better economic performance than susceptible varieties. It is assumed that these varieties will allow a substantial reduction of fungicide use for an advanced integrated pest management under central European conditions.

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Section: Introductionsupporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%

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New Generation of Resistant Sugar Beet Varieties for Advanced Integrated Management of Cercospora Leaf Spot in Central Europe

et al. 2018

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“…In a case study carried out in Germany, the resistant varieties possessed a lower yield potential than susceptible ones under disease-free conditions (BSA, 2012). Less susceptible varieties yielded about 5-7% lower than the highest-yielding susceptible varieties under disease-free conditions (Gummert et al, 2015). Mechelke, (2000) reported that resistant varieties presented 10-18% yield penalty in the absence of the pathogen, and thus too low to gain acceptance for cultivation on a large scale on commercial farms.…”

Section: Introduction:-mentioning

confidence: 99%

Yield Penalty Associated With Stacking Resistance to Late Leaf Spot, Rosette Diseases and Drought Stress in Groundnut (Arachis Hypogaea L.)

Mohammed¹

2019

IJAR

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“…However, yield decrease of the investigated resistant varieties grown in Cercospora-free environments was 5-7% (Gummert et al, 2015). The application of synthetic fungicides is stills the most effective disease control method.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of fungicides in sugar beet crops

Avižienytė

Brazienė

Romaneckas

et al. 2016

Zemdirbyste-Agriculture

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Cercospora and ramularia leaf spot are the most damaging fungal diseases of sugar beet in Europe. The aim of the current study was to evaluate the severity of fungal diseases and the efficacy of various fungicides and their doses in sugar beet crops in Lithuania. A short-term field experiment was carried out in 2012 and 2013 at Rumokai Experimental Station, Lithuanian Research Centre for Agriculture and Forestry on a moderately heavy loam HapliEpihypogleyic Luvisol (LVg-p-w-ha). Fungicides Impact (a.i. flutriafol), Opus (a.i. epoxiconazole), Artea (a.i. propikonazole + cyproconazole), Folicur (a.i. tebuconazole), Opera N (a.i. pyraclostrobin + epoxiconazole) were applied as a single application at the beginning of the disease occurrence (in August) and as a double application, with one spray at the beginning of the disease occurrence (in August) plus a second spray one month later (in September). The experimental results showed that the main fungal diseases in the sugar beet crops tested were Cercospora beticola and Ramularia beticola. Erysiphe betae was of minor severity. The application of fungicides significantly decreased the severity of cercospora and ramularia leaf spots by on average 19.8-81.8% and 71.8-91.8%, respectively. The most effective fungicides were Opus (a.i. epoxiconazole) and Impact (a.i. flutriafol). A single or double application of all the investigated fungicides had essentially the same effect. The most effective against powdery mildew was fungicide Opus, treated twice. Various active ingredients of the fungicides had insignificant effect on sugar beet yield and sucrose content in the roots. A single application of the fungicide Artea 0.5 L ha -1 (a.i. propiconazole + cyproconazole) and a double application Opus 1.0 L ha -1 (a.i. epoxiconazole) and Folicur 1.0 L ha -1 (a.i. tebuconazole) significantly decreased the content of impurities (potassium, sodium, alpha amino nitrogen) in the sugar beet roots compared with the untreated control treatment.

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Variety resistance to Cercospora leaf spot and fungicide application as tools of integrated pest management in sugar beet cultivation – A German case study

Cited by 20 publications

References 19 publications

New Generation of Resistant Sugar Beet Varieties for Advanced Integrated Management of Cercospora Leaf Spot in Central Europe

New Generation of Resistant Sugar Beet Varieties for Advanced Integrated Management of Cercospora Leaf Spot in Central Europe

Yield Penalty Associated With Stacking Resistance to Late Leaf Spot, Rosette Diseases and Drought Stress in Groundnut (Arachis Hypogaea L.)

Efficacy of fungicides in sugar beet crops

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