General information State: Published Organisations: Section of Poultry Diseases, Division of Poul... more General information State: Published Organisations: Section of Poultry Diseases, Division of Poultry, Fish and Fur Animals, National Veterinary Institute, Division of Microbiology and Risk Assessment, National Food Institute Contributors: Skov, M. N., Hald, B., Nielsen, E. M., Madsen, J. J., Rahbek, C., Lodal, J., Jespersen, J. B., Jørgensen, J. C. , Pedersen, K., Dietz, H. H., Chriél, M., Baggesen, D. L. Pages: 18 Publication date: 2003 Peer-reviewed: No
. The density of cattle‐visiting flies (Muscidae) and the load of black‐flies (Simulium spp.) wer... more . The density of cattle‐visiting flies (Muscidae) and the load of black‐flies (Simulium spp.) were estimated in twelve and eighteen inland pastures in Denmark in 1984 and 1985 respectively. No differences in the geographical distribution pattern of the predominant cattle‐visiting Muscidae were recorded, whilst the relative abundance and density of the species and the total fly‐load varied considerably between pastures. In most cases the mean loads of Haema‐tobia irritans (L.) and Hydrotaea irritans (Fall.) on heifers varied significantly in relation to site topography and shelter. These crude site variables explained 65–98% of the variation in densities of horn flies and sheep head flies observed between pastures. Highest densities of Hydrotaea irritans were primarily associated with permanent, low‐lying, fairly sheltered grassland sites, whereas the density was low in temporary, dry, wind‐exposed pastures. A comparable relationship was found for Haematobia irritans. With Haematobosca stimulans (Mg.) and Morellia spp. no relation between grassland environment and fly density was detected.
Journal of Applied Ecology (1990), 27, 1-15 TREATING CATTLE WITH IVERMECTIN: EFFECTS ON THE FAUNA... more Journal of Applied Ecology (1990), 27, 1-15 TREATING CATTLE WITH IVERMECTIN: EFFECTS ON THE FAUNA AND DECOMPOSITION OF DUNG PATS By M. MADSEN,* B. OVERGAARD NIELSEN,t P. HOLTER,J О. С PEDERSEN,Î J. BR0CHNER JESPERSEN,§ K.-M. VAGN ...
Heifers were treated with the recommended doses of ivermectin: 0.2 mg/ kg bw by subcutaneous inje... more Heifers were treated with the recommended doses of ivermectin: 0.2 mg/ kg bw by subcutaneous injection or 0.5 mg/kg bw by pour-on. An analytic procedure is described and used for the detection of ivermectin residues excreted in dung. A large amount of the higher pour-on dose was excreted during the first five days after dosing due to a more rapid distribution to intestinal contents. Later faecal concentrations after the pour-on treatment were lower than those found after subcutaneous injection. No degradation of ivermectin was detected in pats exposed in the field for up to 45 days. Ivermectin excreted in dung voided 1–2 days after both treatments significantly reduced the number of dung inhabiting larvae of Aphodius spp. (Coleoptera: Scarabaeidae), but no effect was seen in dung deposited 13–14 days after treatments. Development of cyclorrhaphan larvae was inhibited in dung deposited up to 28–29 days after subcutaneous injection treatment, but only inhibited in dung deposited up to...
In connection with attacks by simuliids on cattle in Denmark in 1986, the biology of Simulium orn... more In connection with attacks by simuliids on cattle in Denmark in 1986, the biology of Simulium ornatum is discussed
General information State: Published Organisations: Section of Poultry Diseases, Division of Poul... more General information State: Published Organisations: Section of Poultry Diseases, Division of Poultry, Fish and Fur Animals, National Veterinary Institute, Division of Microbiology and Risk Assessment, National Food Institute Contributors: Skov, M. N., Hald, B., Nielsen, E. M., Madsen, J. J., Rahbek, C., Lodal, J., Jespersen, J. B., Jørgensen, J. C. , Pedersen, K., Dietz, H. H., Chriél, M., Baggesen, D. L. Pages: 18 Publication date: 2003 Peer-reviewed: No
. The density of cattle‐visiting flies (Muscidae) and the load of black‐flies (Simulium spp.) wer... more . The density of cattle‐visiting flies (Muscidae) and the load of black‐flies (Simulium spp.) were estimated in twelve and eighteen inland pastures in Denmark in 1984 and 1985 respectively. No differences in the geographical distribution pattern of the predominant cattle‐visiting Muscidae were recorded, whilst the relative abundance and density of the species and the total fly‐load varied considerably between pastures. In most cases the mean loads of Haema‐tobia irritans (L.) and Hydrotaea irritans (Fall.) on heifers varied significantly in relation to site topography and shelter. These crude site variables explained 65–98% of the variation in densities of horn flies and sheep head flies observed between pastures. Highest densities of Hydrotaea irritans were primarily associated with permanent, low‐lying, fairly sheltered grassland sites, whereas the density was low in temporary, dry, wind‐exposed pastures. A comparable relationship was found for Haematobia irritans. With Haematobosca stimulans (Mg.) and Morellia spp. no relation between grassland environment and fly density was detected.
Journal of Applied Ecology (1990), 27, 1-15 TREATING CATTLE WITH IVERMECTIN: EFFECTS ON THE FAUNA... more Journal of Applied Ecology (1990), 27, 1-15 TREATING CATTLE WITH IVERMECTIN: EFFECTS ON THE FAUNA AND DECOMPOSITION OF DUNG PATS By M. MADSEN,* B. OVERGAARD NIELSEN,t P. HOLTER,J О. С PEDERSEN,Î J. BR0CHNER JESPERSEN,§ K.-M. VAGN ...
Heifers were treated with the recommended doses of ivermectin: 0.2 mg/ kg bw by subcutaneous inje... more Heifers were treated with the recommended doses of ivermectin: 0.2 mg/ kg bw by subcutaneous injection or 0.5 mg/kg bw by pour-on. An analytic procedure is described and used for the detection of ivermectin residues excreted in dung. A large amount of the higher pour-on dose was excreted during the first five days after dosing due to a more rapid distribution to intestinal contents. Later faecal concentrations after the pour-on treatment were lower than those found after subcutaneous injection. No degradation of ivermectin was detected in pats exposed in the field for up to 45 days. Ivermectin excreted in dung voided 1–2 days after both treatments significantly reduced the number of dung inhabiting larvae of Aphodius spp. (Coleoptera: Scarabaeidae), but no effect was seen in dung deposited 13–14 days after treatments. Development of cyclorrhaphan larvae was inhibited in dung deposited up to 28–29 days after subcutaneous injection treatment, but only inhibited in dung deposited up to...
In connection with attacks by simuliids on cattle in Denmark in 1986, the biology of Simulium orn... more In connection with attacks by simuliids on cattle in Denmark in 1986, the biology of Simulium ornatum is discussed
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