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Relative ovicidal effect of soil microfungi on thick-shelled eggs of animal-parasitic nematodes

Thapa, Sundar; Meyling, Nicolai V.; Katakam, Kiran Kumar; Thamsborg, Stig Milan and Mejer, Helena (2014) Relative ovicidal effect of soil microfungi on thick-shelled eggs of animal-parasitic nematodes. Biocontrol Science and Technology. [Completed]

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Summary

Thick-shelled eggs of animal-parasitic ascarid nematodes can survive and remain infective in the environment for years. The present study was conducted to assess the effect of two species of soil microfungi (Pochonia chlamydosporia and Purpureocillium lilacinum) on the development and survival of eggs (all of faecal origin) of three ascarid species, Ascaridia galli (chicken roundworm), Toxocara canis (canine roundworm) and Ascaris suum (pig roundworm), in vitro. Ascarid eggs were embryonated on water agar with or without one fungal species, and viability of the eggs was evaluated on days 7, 14, 21, 28, 35 and 42 post set up (p.s.). By day 14 p.s., P. chlamydosporia had reduced the viability of A. galli and T. canis eggs by 70-86% and 52-67%, respectively, compared to controls without fungus. In contrast, P. lilacinum had reduced the viability of A. galli and T. canis eggs by only 17-30% and 6-28%, respectively. Ascaris suum eggs were extremely resistant to both fungi. The differences in results are likely due to the variability in egg shell morphologies of the three ascarid species. The current in vitro study demonstrates that P. chlamydosporia may potentially be utilized as a biocontrol agent to reduce A. galli and T. canis egg contamination of the environment.


EPrint Type:Journal paper
Subjects: Animal husbandry > Health and welfare
Research affiliation: Denmark > Organic RDD 1 > PAROL
Denmark > KU - University of Copenhagen
Deposited By: Mejer, Dr Helena
ID Code:27341
Deposited On:03 Oct 2014 10:41
Last Modified:03 Oct 2014 10:41
Document Language:English
Status:Unpublished
Refereed:Not peer-reviewed

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