Individual study: Efficacy of acaricidal tags and pour-on as prophylaxis against ticks and louping-ill in red grouse
Laurenson M.K., Hudson P.J., McGuire K. & Thirgood S.J. (1997) Efficacy of acaricidal tags and pour-on as prophylaxis against ticks and louping-ill in red grouse. Medical and Veterinary Entomology, 11, 389-393
This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.
Remove ectoparasites from feathers to increase survival or reproductive success
A replicated and controlled study in 1995-6 on a grouse moor in Morayshire, Scotland (Laurenson et al. 1997), found that red grouse Lagopus lagopus scoticus treated with spot applications of deltamethrin had significantly lower tick burdens, compared to control birds, significantly lower louping ill virus (LIV) infections and higher survival rates at ten weeks old compared with controls (82% survival for seven treated broods vs. 64% for seven controls). Chicks treated with lambdacyhalothrin-impregnated (tick-removal) tags also had lower tick burdens than controls, as did chicks from broods where mother only was treated (0-0.1 immature ticks/chick for broods with treated chicks vs. 0.5-0.7 for broods with treated hens and 1.4-2.3 for controls), but they did not have lower LIV infection rates or increased survival to ten weeks old.