EurekaMag.com logo
+ Site Statistics
References:
52,725,316
Abstracts:
28,411,598
+ Search Articles
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Factors influencing rain splash dispersal of infective larvae of Ostertagia ostertagi (Trichostrongylidae) from cow pats to the surroundings






Veterinary Parasitology, 311: 57-70

Factors influencing rain splash dispersal of infective larvae of Ostertagia ostertagi (Trichostrongylidae) from cow pats to the surroundings

Laboratory experiments were conducted to investigate rain splash dispersal of infective Ostertagia ostertagi larvae (L3) from cow pats to the surroundings during simulated rainfall. Simulated rainfall on dry cow pats resulted in dispersal of only very few L3. When cow pats were watered prior to the experiments, many infective larvae were stimulated to migrate up onto the surface of the pats, where they might be hit by water drops. When pre-watered pats were hit by falling drops, a considerable proportion of L3 was translocated. More than 90% of the translocated larvae were transported passively by splash droplets and only a minor part of the larvae migrated actively in water films or were transported passively by water run-off to the soil surrounding the pats. A reduction of the fall height of the simulated raindrops resulted in a significant reduction of the number of translocated L3. When cow pats were hit by drops of diameters between 2 and 5 mm, it was found that small raindrops were just as effective as large drops in splash dispersal of L3, provided the amount of rain was the same; but individual small drops were less effective in this respect than individual large drops. When splash droplets could travel freely, most of the splash-dispersed L3 were found within a horizontal distance of 90 cm from the pats; this applied for all sizes of drops. Most splash droplets carrying L3 were travelling within a vertical distance of 30 cm from the ground.

Accession: 001833767

PMID: 2728328

DOI: 10.1016/0304-4017(89)90008-3

Download PDF Full Text: Factors influencing rain splash dispersal of infective larvae of Ostertagia ostertagi (Trichostrongylidae) from cow pats to the surroundings



Related references

Grønvold, J.; Høgh-Schmidt, K., 1989: Factors influencing rain splash dispersal of infective larvae of Ostertagia ostertagi (Trichostrongylidae) from cow pats to the surroundings. Laboratory experiments were conducted to investigate rain splash dispersal of infective Ostertagia ostertagi larvae (L3) from cow pats to the surroundings during simulated rainfall. Simulated rainfall on dry cow pats resulted in dispersal of only...

Grønvold, J., 1987: A field experiment on rain splash dispersal of infective larvae of Ostertagia ostertagi (Trichostrongylidae) from cow pats to surrounding grass. Faecal pats containing O. ostertagi eggs were placed on pasture, either directly on the herbage or in sunken buckets, to prevent active migration or passive transportation by water run-off. Larval counts on the surrounding grass after 28 and 50 da...

Grønvold, J.; Nansen, P.; Henriksen, S.A.; Thylin, J.; Wolstrup, J., 1988: The capability of the predacious fungus Arthrobotrys oligospora (Hyphomycetales) to reduce numbers of infective larvae of Ostertagia ostertagi (Trichostrongylidae) in cow pats and herbage during the grazing season in Denmark. Artificially prepared cow pats containing O. ostertagi eggs were deposited on 2 pasture plots near Copenhagen, Denmark, in May, June and July 1986. Half of the cow pats, placed on one plot, were inoculated with 2000 conidia/g faeces of A. oligospo...

Gronvold, J., 1989: Transmission of infective larvae of Ostertagia ostertagi and Cooperia oncophora (Trichostrongylidae: Nematoda)

Gronvold J., 1984: Rain splash dispersal of 3rd stage larvae of cooperia spp trichostrongylidae. Laboratory investigations were designed to study the distribution of splash droplets caused by splashes of water on the surface of a cow pat. Laboratory and field experiments were designed to evaluate the possibility of water splash dispersal of 3...

Grønvold, J., 1984: Rain splash dispersal of third-stage larvae of Cooperia spp. (Trichostrongylidae). One incident drop of water 5 mm in diameter falling 2.2 m on a cow pat produced approximately 1000 splash droplets. In still air, more than 90% of the splash droplets were found within 60 cm from the point of impact and only a few travelled beyond...

Grønvold, J., 1989: Induction of nematode-trapping organs in the predacious fungus Arthrobotrys oligospora (Hyphomycetales) by infective larvae of Ostertagia ostertagi (Trichostrongylidae). Laboratory experiments were designed to study the influence of temperature, concentrations of nematodes, oxygen tension, light, and nutrient levels, on the induction of nematode-trapping hyphal nets in the predacious fungus Arthrobotrys oligospora...

Grønvold, J.; Henriksen, S.A.; Nansen, P.; Wolstrup, J.; Thylin, J., 1989: Attempts to control infection with Ostertagia ostertagi (Trichostrongylidae) in grazing calves by adding mycelium of the nematode-trapping fungus Arthrobotrys oligospora (Hyphomycetales) to cow pats. Artificially prepared cow pats containing O. ostertagi eggs were deposited on 2 comparable grazing plots in Denmark at weekly intervals during June and July 1987. Before deposition the cow pats, on the one plot, were inoculated with 0.250 g myceli...

Bisset, S.; Kleinjan, E.; Vlassoff, A., 1984: Development of Ostertagia leptospecularis in cattle, and the differentiation of infective larvae and female adults from those of Ostertagia ostertagi. Veterinary parasitology: (1 2) 23-33

Bisset S.A.; Kleinjan E.D.; Vlassoff A., 1984: Development of ostertagia leptospicularis in cattle and the differentiation of infective larvae and female adults from those of ostertagia ostertagi. The development of O. leptospicularis was observed in helminthologically-naive calves. Infective larvae and parasitic stages of the species were also examined to find a reliable means of distinguishing these from comparable stages of O. ostertagi....