Invasive Species Compendium

Detailed coverage of invasive species threatening livelihoods and the environment worldwide

Abstract

Blowfly strike and wool growth. 1. Role of anorexia in mediating effects on wool.

Abstract

Finewool Merino wethers 18 months of age were experimentally infected with 500 1st instar Lucilia cuprina (FS), pair-fed with an infected sheep (PFC) or left untreated as controls (C). Struck sheep developed moderate areas of myiasis (452±102 cm2) associated with fever and reduced feed intake. FS or PFC treatments had no effect on final fleece weight but FS significantly reduced staple strength (27.0±2.6, 12.8±2.6 and 23.4±1.7 for C, FS and PFC, respectively, P<0.05). Autoradiography revealed significant depression in wool growth during days 1-14 in FS sheep and overall depression in wool growth relative to C of -20.4% over days 1-42. In contrast, PFC sheep had a non-significant depression of 5.5% over the same period.