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Start Over Creator Mráček, Zdeněk

1. Comparison of the Galleria baiting technique and a direct extraction method for recovering Steinernema (Nematoda: Rhabditida) infective-stage juveniles from soil

Creator:
Sturhan, Dieter and Mráček, Zdeněk
Format:
print
Type:
model:internalpart and TEXT
Subject:
entomopathogenic nematodes, Steinernema, baiting, extraction, methods, soil, and Czech Republic
Language:
English
Description:
Forty soil samples from forests and other biotopes in Germany and the Czech Republic were studied for the presence of entomopathogenic nematodes using the Galleria bait method at the same time as a sieving-decanting method for direct extraction of infective-stage juveniles. Five Steinernema species were recovered trom the samples from Germany and four species from the samples from Czechia. All five species were recovered with both methods, but the baiting technique was generally less effective and mixtures of species were frequently undetected. The direct extraction method provided quantitative estimates of infective-stage juvenile density but no information on their infcclivity or on morphological characters of adults, and nematode cultures could not be established.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public

2. Survey of entomopathogenic nematodes from the families Steinernematidae and Heterorhabditidae (Nematoda: Rhabditida) in the Czech Republic

Creator:
Mráček, Zdeněk, Bečvář, Stanislav, and Kindlmann, Pavel
Format:
print
Type:
model:internalpart and TEXT
Subject:
Czech Republic, insect abundance, soil, habitat, entomopathogenic nematodes, Heterorhabditidae, and Steinernematidae
Language:
English
Description:
Soil samples were collected from the whole territory of the Czech Republic, and the presence of entomopathogenic nematodes from the families Steinernematidae and Heterorhabditidae was evaluated by Galleria traps method. Of the 342 samples studied, 53.8% were positive for entomopathogenic nematodes with only one positive for the heterorhabditid, Heterorhabditis megidis Poinar, Jackson ct Klein. 1987. Of steinernematid species, Steinernema kraussei (Steiner, 1923), Steinernema felliae (Filipjev, 1934), Steinernema affine (Bovicn, 1937), Steinernema intermedium (Poinar, 1985), Steinernema bicornutum Tallosi, Peters et F.hlers, 1995, and Steinernema sp. belonging to “glaseri" group were recovered. With several exceptions the nematodes occurred in all the ecosystems, subecosystcms and habitats studied. They were more frequently found in samples from tree than open habitats, from light than heavy soil, and their incidence was ubiquitous, rather than patchy. Dependence of entomopathogenic nematodes on insect incidence seemed to be elementary for both their incidence and abundance. The sampling sites with moderate to severe insect abundance were 66.5 % positive for nematodes while those with slight or no visible insect abundance only 15 %.
Rights:
http://creativecommons.org/licenses/by-nc-sa/4.0/ and policy:public