Pathotypes of Heterodera a Venae (Nematoda: Heteroderidae) in Czechoslovakia

Sabová, M.; Lišková, M.; Valocka, B.; Vargová, V.

doi:10.1163/002925990x00392

Cited by 3 publications

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“…The present results showed that the occurrence of Heterodera avenae in the cereal growing areas of Slovakia is 56.4%, that is less than the 60% reported by SABOVÁ et al (1977), but similar to the results of VALOCKÁ et al (1993b) at 56%. In 46.2% of the localities there was a low incidence of the parasite, while in 1977 that level was 52.4% and in 1993 it was 51%.…”

Section: Discussionsupporting

confidence: 90%

“…It is assumed that a high multiplication of the cereal cyst nematode on winter wheat cultivars presents a risk for high initial infestation of subsequent cereals in a crop rotation, as stressed by VALOCKÁ et al (1994). Our results demonstrate the fact that occurrence and geographical distribution of H. avenae in the Slovak Republic has not changed, although the incidence is slightly lower than found earlier by SABOVÁ et al (1977). Most cysts of the parasite were found at localities of Western Slovakia.…”

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confidence: 50%

“…41, The problem was sufficiently important to require characterisation of H. avenae pathotypes in Czechoslovakia. The first study on this aspect was done by SABOVÁ et al (1988b), who tested four H. avenae populations and showed the predominance of pathotype C (Ha 12). Several pathotypes of H. avenae have been found in Europe, for example, the two pathotypes Ha51 and Ha11 occur in Norway (ROSLANGEN 1998).…”

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confidence: 99%

“…The first study on this aspect was done by SABOVÁ et al (1988b), who tested four H. avenae populations and showed the predominance of pathotype C (Ha 12). Several pathotypes of H. avenae have been found in Europe, for example, the two pathotypes Ha51 and Ha11 occur in Norway (ROSLANGEN 1998).The aim of this work was to determine the current occurrence of Heterodera avenae in Slovakia at localities where a higher occurrence of it had been observed during previous studies (SABOVÁ et al 1977;VALOCKÁ et al 1993b) and to compare the new data with previous ones. …”

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confidence: 99%

“…The intensity of the occurrence of Heterodera avenae cysts depends on the type of cereals, type of soil and climatic conditions of the area. The growing of cereals as a monoculture has resulted in an increasing population of H. avenae.Seventeen cyst nematode species are known to occur in the Slovak Republic (STURHAN (SABOVÁ et al 1988c). It is assumed, that new species of cereal cyst nematodes may be found in cereals in the future.…”

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Current occurrence and distribution of heterodera avenae in the Slovak Republic

Renčo¹

2005

Plant Prot. Sci.

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(Woll.) in the cereal growing areas of the Slovak Republic was studied. 188 soil samples from 27 districts throughout the country were analysed; Heterodera avenae was present in 56.4% of the samples, at an incidence of 2-81 cysts in 100 g soil. At 87 localities the incidence of the parasite was low, at 15 it was medium, and high at 4 localities. 81Plant Protect. Sci. Vol. 41, The problem was sufficiently important to require characterisation of H. avenae pathotypes in Czechoslovakia. The first study on this aspect was done by SABOVÁ et al. (1988b), who tested four H. avenae populations and showed the predominance of pathotype C (Ha 12). Several pathotypes of H. avenae have been found in Europe, for example, the two pathotypes Ha51 and Ha11 occur in Norway (ROSLANGEN 1998).The aim of this work was to determine the current occurrence of Heterodera avenae in Slovakia at localities where a higher occurrence of it had been observed during previous studies (SABOVÁ et al. 1977;VALOCKÁ et al. 1993b) and to compare the new data with previous ones. MATERIAL AND METHODSThe survey of the occurrence and geographical distribution of Heterodera avenae sensu stricto in the Slovak Republic was performed during 2003 and 2004. In the cereal growing areas of Slovakia, 188 soil samples were collected from the rhizosphere of cereals (115 in winter wheat, 41 in winter barley, 18 in spring barley, 10 in oat and 4 in rye) at a depth of 15-20 cm, 2 weeks before harvest. One basic sample (500 g of soil) was obtained from an area of 10 × 10 m by 10 randomised soil collections. Average samples (200 g) were obtained by mixing two basic samples. The samples were slowly dried in a laboratory and cysts were extracted from 100 g of soil by using the flotation method (SABOVÁ & VALOCKÁ 1980). The species to which the cysts belonged were identified morphologically by the original descriptions of cysts and second stage larvae development (MULVEY 1972;WOUTS & WEISHER 1977). The population densities of H. avenae were evaluated as low if there were less than 14 cysts/100 g soil, as medium for 14 to 40 cysts/100 g, and high for more than 40 cysts/100 g soil. RESULTSThe current occurrence and geographical distribution of H. avenae in the Slovak Republic is presented in Table 1. The incidence of cysts ranged from 2 to 81 cysts in 100 g of soil. In the area with more intensive cultivation of cereals in Western Slovakia, 111 localities were investigated, with a medium abundance of occurrence at 53.1%. The abundance varied from 25 to 100% (district of Senica). The highest incidence was found in district Zlaté Moravce (81 cysts/100 g soil), which also showed the highest average number of cysts per locality (29.6 cysts). The lowest abundance was in the district of Pezinok, although the incidence was relatively high (23 cysts/100 g soil). Only in district Piešťany was no H. avenae found.In the Central area of the Slovak Republic, 64 localities were investigated with an abundance of 54.6%. The areas with the most infested soil were in district Nové Mesto na...

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Section: Discussionsupporting

confidence: 90%

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confidence: 99%

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Current occurrence and distribution of heterodera avenae in the Slovak Republic

Renčo¹

2005

Plant Prot. Sci.

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Description and molecular characterisation of Paralongidorus litoralis sp. n. and P. paramaximus Heyns, 1965 (Nematoda: Longidoridae) from Spain

Palomares-Rius

Subbotin

Landa

et al. 2008

Nematol

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Paralongidorus litoralis sp. n., a new bisexual species of the genus, is described and illustrated by light microscopy, scanning electron microscopy and molecular studies from specimens collected in a coastal sand dune soil around roots of lentisc (Pistacia lentiscus L.) from Zahara de los Atunes (Cadiz), southern Spain. Paralongidorus litoralis sp. n. is characterised by the large body size (7.5-10.0 mm), a rounded lip region, clearly offset from the body by a collar-like constriction, and bearing a very large stirrup-shaped, amphidial fovea, with conspicuous slit-like aperture, a very long and flexible odontostyle ca 190 μm long, guiding ring located at 35 μm from anterior end, and males with spicules ca 70 μm long. In addition, identification data of a Spanish population of P. paramaximus Heyns, 1965 recovered from sandy soil of a commercial citrus orchard at Alcala de Guadaira (Seville), southern Spain, agree very well with the original description of the species from South Africa. The 18S rRNA and D2 and D3 expansion regions of 28S rRNA gene sequences were obtained for P. litoralis sp. n. and P. paramaximus. Phylogenetic analyses of P. litoralis sp. n. and P. paramaximus rRNA gene sequences and of Longidoridae sequences published in GenBank were done using maximum likelihood and Bayesian inference. In trees generated from the 18S data set Paralongidorus clustered as an external clade from Longidorus, and in trees generated from D2-D3 of 28S dataset Paralongidorus was monophyletic and nested within Longidorus. Maximum likelihood test supported the hypothesis of validity of the Paralongidorus genus.

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Occurrence and geographical distribution of cyst nematodes in cereals and grassland in the Slovak Republic

Renčo

Čerevková

2008

Helminthologia

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A study of occurrence and geographical distribution of cyst-forming nematodes in monocultural cereal fields and multispecies grassland vegetation in Slovak Republic revealed the presence of two species of Heterodera: H. avenae and H. schachtii. The frequency of occurrence of H. avenae was 37.8 % in cereal fields and 3.3 % in grassland. Cysts of H. schachtii were found only in cereal fields along with cysts of H. avenae, in the western part of country. The occurrence of other graminaceous cyst nematode species was not recorded.

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Pathotypes of Heterodera a Venae (Nematoda: Heteroderidae) in Czechoslovakia

Cited by 3 publications

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Current occurrence and distribution of heterodera avenae in the Slovak Republic

Current occurrence and distribution of heterodera avenae in the Slovak Republic

Description and molecular characterisation of Paralongidorus litoralis sp. n. and P. paramaximus Heyns, 1965 (Nematoda: Longidoridae) from Spain

Occurrence and geographical distribution of cyst nematodes in cereals and grassland in the Slovak Republic

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