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Biological control of Ostertagia ostertagi by feeding selected nematode-trapping fungi to calves

Published online by Cambridge University Press:  05 June 2009

J. Grønvold ,
J. Wolstrup ,
M. Larsen ,
S. A. Henriksen  and
P. Nansen
J. Grønvold
Affiliation:
Department of Veterinary Microbiology, Section for Parasitology, Royal Veterinary and Agricultural University, 13 Bülowsvej, DK-1870 Frederiksberg C, Denmark
J. Wolstrup
Affiliation:
Department of Ecology and Molecular Biology, Section for Microbiology, Royal Veterinary and Agricultural University, 21 Rolighedsvej, DK-1870 Frederiksberg C, Denmark
M. Larsen
Affiliation:
Department of Veterinary Microbiology, Section for Parasitology, Royal Veterinary and Agricultural University, 13 Bülowsvej, DK-1870 Frederiksberg C, Denmark
S. A. Henriksen
Affiliation:
National Veterinary Laboratory, 27 Bülowsvej, DK-1870 Frederiksberg C, Denmark
P. Nansen
Affiliation:
Department of Veterinary Microbiology, Section for Parasitology, Royal Veterinary and Agricultural University, 13 Bülowsvej, DK-1870 Frederiksberg C, Denmark
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Abstract

Three nematode-trapping fungi, one Arthrobotrys oligospora and two Duddingtonia flagrans isolates, were fed to Ostertagia ostertagi-infected calves to test their ability to destroy larvae of this parasite in faeces and consequently to reduce the transmission of infective larvae to herbage. The fungi had previously been selected for their capability to pass the alimentary tract of cattle without losing growth and nematode-trapping potentials. Dung was collected from three calves each fed one of the three fungi and placed as 1-kg cow pats on a parasite-free grass plot together with control cow pats from a calf that was not given fungi. The cow pats contained comparable concentrations of parasite eggs. The two D. flagrans isolates were highly effective in that they reduced herbage larval infectivity by 74–85%. In contrast, A. oligospora did not show any effect in the present experiment. Field experiments will demonstrate if D. flagrans represents a potential organism for biological control of bovine gastrointestinal nematodes under practical agricultural management conditions.

Keywords

Arthrobotrys oligosporaDuddingtonia flagransOstertagia ostertagiNematodacattlebiological controlnematode-trapping fungi
Type
Research Papers
Information
Journal of Helminthology , Volume 67 , Issue 1 , March 1993 , pp. 31 - 36
Copyright
Copyright © Cambridge University Press 1993

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