Ralf-Udo Ehlers
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Publications of Ralf-Udo Ehlers (57 listed):
Journal of Applied Entomology (2022) 146, 415-423
Kunlachat Burana, Ralf-Udo Ehlers and Prakaijan Nimkingrat (2022)
Entomopathogenic nematodes for control of the cotton cutworm Spodoptera litura in marigolds
Nematology (2022) 24, 559-570
Puping Ta-oun, Ralf-Udo Ehlers and Prakaijan Nimkingrat (2022)
Effects of soil texture and moisture on the host searching abilities of Steinernema siamkayai against Bactrocera latifrons
Journal of Applied Entomology (2020) 144, 491-499
Branimir Njezic and Ralf-Udo Ehlers (2020)
Entomopathogenic nematodes control Plum Sawflies (Hoplocampa minuta and H. flava)
Nematology (2016) 18, 367-376
Temesgen Addis, Nevena Mijuskovic, Olaf Strauch and Ralf-Udo Ehlers (2016)
Life history traits, liquid culture production and storage temperatures of Steinernema yirgalemense
Nematology (2016) 18, 277-291
Mudassir Iqbal, Ralf-Udo Ehlers and Lieven Waeyenberge (2016)
Molecular characterisation of novel isolates of entomopathogenic nematodes
Nematology (2016) 18, 963-972
Temesgen Addis, Shiferaw Demissie, Olaf Strauch and Ralf-Udo Ehlers (2016)
Influence of bacterial density and mating on life history traits of Heterorhabditis bacteriophora
Nematology (2014) 16, 929-936
Temesgen Addis, Asmamaw Teshome, Olaf Strauch and Ralf-Udo Ehlers (2014)
Life history trait analysis of the entomopathogenic nematode Steinernema riobrave
BioControl (2013) 58, 417-426
Prakaijan Nimkingrat, Shakhina Khanam, Olaf Strauch and Ralf-Udo Ehlers (2013)
Hybridisation and selective breeding for improvement of low temperature activity of the entomopathogenic nematode Steinernema feltiae
Journal of Applied Entomology (2013) 137, 88-96
S. Anbesse and R.-U. Ehlers (2013)
Heterorhabditis sp. not attracted to synthetic (E)-β-caryophyllene, a volatile emitted by roots upon feeding by corn rootworm
BioControl (2013) 58, 85-93
Samuel Anbesse, Nanette Hope Sumaya, Anna Verena Dörfler, Olaf Strauch and Ralf-Udo Ehlers (2013)
Stabilisation of heat tolerance traits in Heterorhabditis bacteriophora through selective breeding and creation of inbred lines in liquid culture
Nematology (2013) 15, 451-458
Prakaijan Nimkingrat, Felix Uhlmann, Olaf Strauch and Ralf-Udo Ehlers (2013)
Desiccation tolerance of dauers of entomopathogenic nematodes of the genus Steinernema
Biocontrol Science and Technology (2013) 23, 348-361
P. Nimkingrat, O. Strauch and R.-U. Ehlers (2013)
Hybridisation and genetic selection for improving desiccation tolerance of the entomopathogenic nematode Steinernema feltiae
Biocontrol Science and Technology (2012) 22, 1035-1045
Samuel Ashebir Anbesse, Olaf Strauch and Ralf-Udo Ehlers (2012)
Genetic improvement of the biological control nematode Heterorhabditis bacteriophora (Rhabditidomorpha: Heterorhabditidae): heterosis effect enhances desiccation but not heat tolerance
Nematology (2012) 14, 389-394
Michael J. Wilson, Ralf-Udo Ehlers and Itamar Glazer (2012)
Entomopathogenic nematode foraging strategies - is Steinernema carpocapsae really an ambush forager?
Nematology (2012) 14, 741-757
Tewodros Tamiru, Lieven Waeyenberge, Tesfaye Hailu, Ralf-Udo Ehlers, Vladimír Puza and Zdenek Mrácek (2012)
Steinernema ethiopiense sp. n. (Rhabditida: Steinernematidae), a new entomopathogenic nematode from Ethiopia
European Journal of Plant Pathology (2011) 130, 287-295
Ruba Abuamsha, Mazen Salman and Ralf-Udo Ehlers (2011)
Effect of seed priming with Serratia plymuthica and Pseudomonas chlororaphis to control Leptosphaeria maculans in different oilseed rape cultivars
BioControl (2011) 56, 101-112
Ruba Abuamsha, Mazen Salman and Ralf-Udo Ehlers (2011)
Differential resistance of oilseed rape cultivars (Brassica napus ssp. oleifera) to Verticillium longisporum infection is affected by rhizosphere colonisation with antagonistic bacteria, Serratia plymuthica and Pseudomonas chlororaphis
Biocontrol Science and Technology (2011) 21, 199-213
Ruba Abuamsha, Mazen Salman and Ralf-Udo Ehlers (2011)
Improvement of seed bio-priming of oilseed rape (Brassica napus ssp. oleifera) with Serratia plymuthica and Pseudomonas chlororaphis
Agricultural and Forest Entomology (2010) 12, 389-402
Stefan Toepfer, Ibolya Hatala-Zseller, Ralf-Udo Ehlers and Arne Peters (2010)
The effect of application techniques on field-scale efficacy: can the use of entomopathogenic nematodes reduce damage by western corn rootworm larvae?
Journal of Applied Entomology (2010) 134, 467-480
S. Toepfer, R. Burger, R.-U. Ehlers, A. Peters and U. Kuhlmann (2010)
Controlling western corn rootworm larvae with entomopathogenic nematodes: effect of application techniques on plant-scale efficacy
Nematology (2010) 12, 201-210
Ayako Hirao, Ralf-Udo Ehlers and Olaf Strauch (2010)
Life cycle and population development of the entomopathogenic nematodes Steinernema carpocapsae and S. feltiae (Nematoda, Rhabditida) in monoxenic liquid culture
BioControl (2010) 55, 423-434
John Mukuka, Olaf Strauch, Lieven Waeyenberge, Nicole Viaene, Maurice Moens and Ralf-Udo Ehlers (2010)
Heat tolerance among different strains of the entomopathogenic nematode Heterorhabditis bacteriophora
Nematology (2010) 12, 711-720
John Mukuka, Olaf Strauch and Ralf-Udo Ehlers (2010)
Variability in desiccation tolerance among different strains of the entomopathogenic nematode Heterorhabditis bacteriophora
BioControl (2010) 55, 511-521
J. Mukuka, O. Strauch, C. Hoppe and R.-U. Ehlers (2010)
Improvement of heat and desiccation tolerance in Heterorhabditis bacteriophora through cross-breeding of tolerant strains and successive genetic selection
Journal of Pest Science (2010) 83, 281-287
John Mukuka, Olaf Strauch, Christopher Hoppe and Ralf-Udo Ehlers (2010)
Fitness of heat and desiccation tolerant hybrid strains of Heterorhabditis bacteriophora (Rhabditidomorpha: Heterorhabditidae)
BioControl (2010) 55, 777-788
Thurkathipana Navaneethan, Olaf Strauch, Samantha Besse, Antoine Bonhomme and Ralf-Udo Ehlers (2010)
Influence of humidity and a surfactant-polymer-formulation on the control potential of the entomopathogenic nematode Steinernema feltiae against diapausing codling moth larvae (Cydia pomonella L.) (Lepidoptera: Tortricidae)
Biocontrol Science and Technology (2009) 19, 1-65
S. Toepfer, T. Haye, M. Erlandson, M. Goettel, J.G. Lundgren, R.G. Kleespies, D.C. Weber, G. Cabrera Walsh, A. Peters, R.-U. Ehlers, H. Strasser, D. Moore, S. Keller, S. Vidal and U. Kuhlmann (2009)
A review of the natural enemies of beetles in the subtribe Diabroticina (Coleoptera: Chrysomelidae): implications for sustainable pest management
Biocontrol Science and Technology (2008) 18, 635-640
Alper Susurluk and Ralf-Udo Ehlers (2008)
Sustainable control of black vine weevil larvae, Otiorhynchus sulcatus (Coleoptera: Curculionidae) with Heterorhabditis bacteriophora in strawberry
BioControl (2008) 53, 627-641
Alper Susurluk and Ralf-Udo Ehlers (2008)
Field persistence of the entomopathogenic nematode Heterorhabditis bacteriophora in different crops
Journal of Applied Entomology (2008) 132, 337-348
S. Toepfer, A. Peters, R.-U. Ehlers and U. Kuhlmann (2008)
Comparative assessment of the efficacy of entomopathogenic nematode species at reducing western corn rootworm larvae and root damage in maize
Biocontrol Science and Technology (2007) 17, 295-302
Jesko Oestergaard, Sabina Voss, Hans Lange, Hilmar Lemke, Olaf Strauch and Ralf-Udo Ehlers (2007)
Quality control of Bacillus thuringiensis ssp. israelensis products based on toxin quantification with monoclonal antibodies
Journal of Applied Entomology (2007) 131, 420-425
B. Kurtz, S. Toepfer, R.-U. Ehlers and U. Kuhlmann (2007)
Assessment of establishment and persistence of entomopathogenic nematodes for biological control of western corn rootworm
Applied and Environmental Microbiology (2007) 73, 3623-3629
Jesko Oestergaard, Ralf-Udo Ehlers, Amparo C. Martínez-Ramírez and Maria Dolores Real (2007)
Binding of Cyt1Aa and Cry11Aa toxins of Bacillus thuringiensis serovar israelensis to brush border membrane vesicles of Tipula paludosa (Diptera: Nematocera) and subsequent pore formation
BioControl (2005) 50, 699-716
Ralf-Udo Ehlers, Jesko Oestergaard, Sonja Hollmer, Michael Wingen and Olaf Strauch (2005)
Genetic selection for heat tolerance and low temperature activity of the Entomopathogenic nematode - bacterium complex Heterorhabditis bacteriophora - Photorhabdus luminescens
Bulletin of Entomological Research (2005) 95, 473-482
S. Toepfer, C. Gueldenzoph, R.-U. Ehlers and U. Kuhlmann (2005)
Screening of entomopathogenic nematodes for virulence against the invasive western corn rootworm, Diabrotica virgifera virgifera (Coleoptera: Chrysomelidae) in Europe
Nematology (2005) 7, 37-44
Sibylle Schroer, Xiaoli Yi and Ralf-Udo Ehlers (2005)
Evaluation of adjuvants for foliar application of Steinernema carpocapsae against larvae of the diamondback moth (Plutella xylostella)
Journal of Applied Entomology (2005) 129, 198-204
S. Schroer, D. Sulistyanto and R.-U. Ehlers (2005)
Control of Plutella xylostella using polymer-formulated Steinernema carpocapsae and Bacillus thuringiensis in cabbage fields
Biocontrol Science and Technology (2005) 15, 601-613
S. Schroer, D. Ziermann and R.-U. Ehlers (2005)
Mode of action of a surfactant-polymer formulation to support performance of the entomopathogenic nematode Steinernema carpocapsae for control of diamondback moth larvae (Plutella xylostella)
Nematology (2004) 6, 633-639
Elisabeth Struck, Lemma Ebssa, Ralf-Udo Ehlers, Hans-Michael Poehling, Andreas Gaigl and Christian Borgemeister (2004)
Interactions between host plants, the subterranean burrower bug, Cyrtomenus bergi, and the entomopathogenic nematode Heterorhabditis megidis
Nematology (2003) 5, 539-547
Dammini W.T.S. Premachandra, Christian Borgemeister, Oliver Berndt, Ralf-Udo Ehlers and Hans-Michael Poehling (2003)
Laboratory bioassays of virulence of entomopathogenic nematodes against soil-inhabiting stages of Frankliniella occidentalis Pergande (Thysanoptera: Thripidae)
BioControl (2003) 48, 529-541
W.T.S.D. Premachandra, C. Borgemeister, O. Berndt, R.-U. Ehlers and H.-M. Poehling (2003)
Combined releases of entomopathogenic nematodes and the predatory mite Hypoaspis aculeifer to control soil-dwelling stages of western flower thrips Frankliniella occidentalis
Biocontrol Science and Technology (2002) 12, 267-276
S.A. Johnigk, S. Hollmer, O. Strauch, U. Wyss and R.-U. Ehlers (2002)
Heritability of the liquid culture mass production potential of the entomopathogenic nematode Heterorhabditis bacteriophora
Nematology (2001) 3, 833-841
Alper Susurluk, Ilona Dix, Erko Stackebrandt, Olaf Strauch, Urs Wyss and Ralf-Udo Ehlers (2001)
Identification and ecological characterisation of three entomopathogenic nematode-bacterium complexes from Turkey
Nematology (2001) 3, 849-853
Jens Aumann and Ralf-Udo Ehlers (2001)
Physico-chemical properties and mode of action of a signal from the symbiotic bacterium Photorhabdus luminescens inducing dauer juvenile recovery in the entomopathogenic nematode Heterorhabditis bacteriophora
Biocontrol Science and Technology (2000) 10, 607-616
R.-U. Ehlers, I. Niemann, S. Hollmer, O. Strauch, D. Jende, M. Shanmugasundaram, U.K. Mehta, S.K. Easwaramoorthy and A. Burnell (2000)
Mass production potential of the bacto-helminthic biocontrol complex Heterorhabditis indica - Photorhabdus luminescens
Journal of Applied Entomology - Zeitschrift für angewandte Entomologie (2000) 124, 375-380
N. Iraki, N. Salah, M.A. Sansour, D. Segal, I. Glazer, S.-A. Johnigk, M.A. Hussein and R.-U. Ehlers (2000)
Isolation and characterization of two entomopathogenic nematode strains, Heterorhabditis indica (Nematoda, Rhabditida), from the West Bank, Palestinian Territories
Nematology (2000) 2, 319-324
Peter Jessen, Olaf Strauch, Urs Wyss, Reiner Luttmann and Ralf-Udo Ehlers (2000)
Carbon dioxide triggers recovery from dauer juvenile stage in entomopathogenic nematodes (Heterorhabditis spp.)
BioControl (2000) 45, 483-500
O. Strauch, I. Niemann, A. Neumann, A.J. Schmidt, A. Peters and R.-U. Ehlers (2000)
Storage and formulation of the entomopathogenic nematodes Heterorhabditis indica and H. bacteriophora
Nematology (1999) 1, 687-693
R.C. Han and R.U. Ehlers (1999)
Trans-specific nematicidal activity of Photorhabdus luminescens
Nematology (1999) 1, 717-726
Stefan-Andreas Johnigk and Ralf-Udo Ehlers (1999)
Endotokia matricida in hermaphrodites of Heterorhabditis spp. and the effect of the food supply
Nematology (1999) 1, 251-260
S.A. Johnigk and R.U. Ehlers (1999)
Juvenile development and life cycle of Heterorhabditis bacteriophora and H. indica (Nematoda : Heterorhabditidae)
Nematologica (1998) 44, 425-435
R.C. Han and R.U. Ehlers (1998)
Cultivation of axenic Heterorhabditis spp. dauer juveniles and their response to non-specific Photorhabdus luminescens food signals
BioControl (1998) 43, 77-86
Ralf-Udo Ehlers, Stefan Lunau, Karina Krasomil-Osterfeld and Karl Hermann Osterfeld (1998)
Liquid culture of the entomopathogenic nematode-bacterium-complex Heterorhabditis megidis / Photorhabdus luminescens
Biocontrol Science and Technology (1996) 6, 303-316
Ralf-Udo Ehlers (1996)
Current and future use of nematodes in biocontrol: Practice and commercial aspects with regard to regulatory policy issues
Biocontrol Science and Technology (1996) 6, 295-302
R.-U. Ehlers (1996)
Insect biocontrol with non-endemic entomopathogenic nematodes (Steinernema and Heterorhabditis spp.): conclusions and recommendations of a combined OECD and COST workshop on scientific and regulatory policy issues
Russian Journal of Nematology (1995) 3, 71-80
B. Tallosi, A. Peters and R.-U. Ehlers (1995)
Steinernema bicornutum sp. n. (Rhabditida: Steinernematidae) from Vojvodina, Yugoslavia
Zeitschrift für Pflanzenkrankheiten und Pflanzenschutz - Journal of Plant Diseases and Protection (1993) 100, 343-353
R.-U. Ehlers and Annette Gerwien (1993)
Selection of entomopathogenic nematodes (Steinernematidae and Heterorhabditidae, Nematoda) for the biological control of cranefly larvae Tipula paludosa (Tipulidae, Diptera).
