Sammanfattning

Management of nematode parasites of grazing livestock is essential, but there is concern about the potential environmental risk from agents used in their control. In this experiment, parasites in young cattle were controlled, using ivermectin boluses or the predacious fungus Duddingtonia flagrans, over 3 years. Treatment differences were sought among the soil nematodes recovered from soil samples collected from the paddocks on which treated animals grazed, and compared with similar samples taken from an untreated control paddock. Analysis of the soil nematode fauna on 21 occasions failed to demonstrate any impact of parasite management on soil nematodes. In 0-22 mm soil total nematode abundance averaged 524 000 m(-2), with 18 nominal taxa and. H' diversity 2.41. There were both underlying paddock and year-to-year, climate-related, differences. The results of this trial not only confirm the lack of any adverse environmental impact of D. flagrans, a promising biological control agent, on soil nematodes, but also fail to show any impact arising from the use of ivermectin boluses.

Nyckelord

bacterial feeding; diversity; Duddingtonia flagrans; environmental impact; Helicotylenchus; ivermectin; nutrient cycling; pasture; Tylenchorhynchus

Publicerad i

Acta Agriculturae Scandinavica, Section A - Animal Science
2002, Volym: 52, nummer: 4, sidor: 233-242
Utgivare: TAYLOR & FRANCIS AS

SLU författare

• Dimander, Sten-Olof

  • Sveriges Veterinärmedicinska Anstalt (SVA)
  • Sveriges lantbruksuniversitet, Sveriges lantbruksuniversitet
    

• Waller, Peter J.

  • Sveriges Veterinärmedicinska Anstalt (SVA)
  • Sveriges lantbruksuniversitet, Sveriges lantbruksuniversitet
    

• Höglund, Johan

  • Institutionen för veterinärmedicinsk mikrobiologi, Sveriges lantbruksuniversitet
    
  • Sveriges Veterinärmedicinska Anstalt (SVA)

UKÄ forskningsämne

Patobiologi


Publikationens identifierare

DOI: https://doi.org/10.1080/090647002762381113

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/40888