Nematode-tolerant sugar beet varieties – resistant or susceptible to the Beet Cyst Nematode Heterodera schachtii?

2017 ◽  
pp. 277-284 ◽  
Author(s):  
Marie Reuther ◽  
Christian Lang ◽  
Florian, M.W. Grundler
Keyword(s):  
Sugar Beet ◽  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
Yield Potential ◽  
High Yield ◽  
Resistant Variety ◽  
Resistance Level ◽  
Beet Cyst Nematode ◽  
Moderately Resistant ◽  
The Impact

The beet cyst nematode Heterodera schachtii (BCN) is an important parasite compromising yield of sugar beet. Standard sugar beet varieties are susceptible to BCN and strongly support BCN reproduction. Another type of variety is resistant to BCN. Although resistance leads to reduced nematode infestation levels, the yield potential of available resistant varieties is low. Tolerant varieties form a third type; high yield is produced with and without BCN infestation. However, so far it has remained unknown whether tolerant sugar beet varieties support or reduce BCN infestation and reproduction under field conditions. In order to address this question, the impact of five tolerant beet varieties on BCN population levels was investigated at 15 locations during a period of three years and compared to a resistant and a susceptible variety. The results demonstrate that all tolerant varieties led to population levels that ranged between that of the susceptible and that of the resistant variety. According to the respective BCN reproduction, the different varieties were classified as moderately susceptible (MS) or highly susceptible (HS) or as moderately resistant (MR) or highly resistant (HR). Tolerant varieties differed in their host status but tended to respond moderately resistant. In conclusion, it is suggested to include the analysis of resistance level either in the official registration procedure for BCN-tolerant sugar beet varieties or to perform this analysis for all registered varieties as a kind of risk assessment.

The beet cyst nematode (Heterodera schachtii): an ancient threat to sugar beet crops in Central Europe has become an invisible actor.

2021 ◽  
pp. 394-399
Author(s):  
Matthias Daub
Keyword(s):  
Sugar Beet ◽  
Integrated Management ◽  
Nematode Species ◽  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
Future Research ◽  
Parasitic Nematodes ◽  
Beet Cyst Nematode ◽  
Management Optimization ◽  
Damage Symptoms

Abstract The beet cyst nematode (BCN) was one of the first discovered plant parasitic nematodes. Heterodera schachtii was observed in 1859 in Halle in Central Germany by the botanist Herman Schacht and described later by Adolf Schmidt in 1871, who named this cyst nematode species after its original discoverer. Partly due to the lack of knowledge about the effect of sugar beet monocultures on the population build-up of BCN, this nematode had a devastating impact on sugar production in 1876 that led to the shutdown of 24 sugar factories in Germany. This chapter discusses the economic importance, distribution, host range, damage symptoms, biology and life cycle, interactions with other nematodes and pathogens, recommended integrated management, and management optimization of H. schachtii. Future research requirements and future developments are also mentioned.

scholarly journals Effect of Winter Oilseed Rape Cropping on the Development of the Sugar Beet Cyst Nematode, Heterodera schachtii, and Control of Volunteer Plants as a Trap Crop Method

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 355
Author(s):  
Daub Matthias
Keyword(s):  
Sugar Beet ◽  
Oilseed Rape ◽  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
Population Increase ◽  
Management Tool ◽  
Multiplication Rate ◽  
Degree Days ◽  
Trap Crop ◽  
Beet Cyst Nematode

The integration of oilseed rape (OSR) into sugar beet rotation systems is restricted due to the very good host status of OSR for the beet cyst nematode (BCN) Heterodera schachtii. In contrast to sugar beet, the cultivation of winter OSR covers a longer period, but at a lower soil temperature regime. Thus, presumably one or two generations of BCN may develop during the cultivation of winter OSR, resulting in moderate multiplication rates of 1–2 in the present study. This multiplication rate was year-dependent, but not affected by different sowing times. For the first time, the present study identified volunteer OSR emerging in high densities post-harvest as a major risk for a high multiplication of BCN at optimum temperatures. The emergence of BCN females with offspring was observed very early, resulting in a significant population increase before 350-degree days (>8 °C) in inoculation experiments and in field investigations. Conducting treatment trials with glyphosate to control volunteer OSR in micro-plots and field experiments confirmed effective suppression of BCN reproduction when growth of volunteer OSR was interrupted at 250–350-degree days. Thus, data gained from BCN reproduction studies under controlled and field conditions provided a unique basis for the development of a trap crop method. The degree day model has been successfully implemented as part of an open access management tool.

scholarly journals Development of a Species-Specific SCAR-PCR Assay for Direct Detection of Sugar Beet Cyst Nematode (Heterodera schachtii) from Infected Roots and Soil Samples

Life ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1358
Author(s):  
Chen Jiang ◽  
Yingdong Zhang ◽  
Ke Yao ◽  
Sulaiman Abdulsalam ◽  
Guangkuo Li ◽  
...  
Keyword(s):  
Sugar Beet ◽  
Cyst Nematode ◽  
Soil Samples ◽  
Heterodera Schachtii ◽  
Cyst Nematodes ◽  
Pcr Assay ◽  
Beet Cyst Nematode ◽  
Field Samples ◽  
Species Specific ◽  
Sugar Beet Cyst Nematode

Sugar beet cyst nematode (SBCN, Heterodera schachtii) is an important nematode that causes significant yield losses of 25–50% or more in most areas of sugar beet production worldwide. Rapid and accurate identification of this species is essential to support decisions on pest management. However, the difference between H. schachtii and other Heterodera spp. based on morphology is a challenging task. In the present study, a SCAR-PCR assay was developed to identify and differentiate H. schachtii in infected root and soil samples. H. schachtii-species-specific SCAR-PCR primers OPA06-HsF and OPA06-HsR were designed from the randomly amplified polymorphic DNA (RAPD) marker amplified with random primer OPA06. The developed primers specifically amplify a 922-bp fragment from the target populations but did not amplify DNA from non-target cyst nematodes including Heterodera, Globodera, Cactodera, and other related species tested in this study. The sensitivity detection indicated that 5 × 10−4 of a single cyst, 1/320 of a single second-stage juvenile (J2), or 10 pg of genomic DNA could be detected. The assay accurately identifies the different stages of H. schachtii in sugar beet and oilseed rape roots as well as a single J2 in 10 g of soil. Finally, the SCAR-PCR assay detected H. schachtii in seven samples out of the fifteen field samples. The assay will not only be useful for differentiating H. schachtii from mixed populations of Heterodera spp. but also for effective detection of the species directly from infested samples. The assay also requires no expertise in the taxonomy and morphology of the species but serves to improve the diagnosis of H. schachtii in infested fields.

Sugar beet nematode Heterodera schachtii distribution and harmfulness in Ukraine

2016 ◽  
Vol 3 (3) ◽  
pp. 3-11 ◽  
Author(s):  
L. Pylypenko ◽  
K. Kalatur ◽  
J. Hallmann
Keyword(s):  
Sugar Beet ◽  
Wide Distribution ◽  
Cyst Nematode ◽  
Control Measures ◽  
Heterodera Schachtii ◽  
Prevention Measures ◽  
Economic Threshold ◽  
Beet Cyst Nematode ◽  
Effi Ciency ◽  
Sugar Beet Cyst Nematode

Aim. To determine the distribution of sugar beet cyst nematode Heterodera schachtii in Ukraine, to defi ne its population density in soil, the degree of damage and the effi ciency of control measures. Methods. Field survey for soil samples, cyst extraction by fl otation and sieving method, light microscopy. Results. The examination of 12,130 ha of agricultural fi elds in six regions of Ukraine, conducted in 2010–2015, recorded the sugar beet cyst nematode to occur in fi ve of them (Kyiv, Chernihiv, Cherkasy, Khmelnytsky, and Vinnytsia), at a total area of 2,572 ha. Taking into consideration the results of previous nematological surveys, the presence of sugar beet cyst nematode has now been documented for 18 regions of Ukraine. In most regions H. schachtii was present in 10–11 % of the examined sugar and seed producing farms with nematode population densities reaching up to 142,000 eggs and juveniles in 100 cc of soil (710-fold above the economic threshold). Conclusions. The main reasons for this wide distribution of H. schachtii in Ukraine are seen in the negligence of prevention measures, unavailability of documented data on its occurrence (missing surveys), crop rotations with over 20 % of host plants, and unavailability of effi cient nematicides and domestic nematode-resistant sugar beet cultivars.

First Report of Sugar Beet Cyst Nematode, Heterodera schachtii on Beetroot and Broccoli in Mexico

Plant Disease ◽  
2019 ◽  
Vol 103 (6) ◽  
pp. 1434-1434
Author(s):  
I. M. Escobar-Avila ◽  
Y. Cruz-Alvarado ◽  
A. Tovar-Soto ◽  
S. A. Subbotin
Keyword(s):  
Sugar Beet ◽  
Cyst Nematode ◽  
Heterodera Schachtii ◽  
First Report ◽  
Beet Cyst Nematode ◽  
Sugar Beet Cyst Nematode
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