Manure characteristics affecting the management of house fly (Musca domestica L.) populations in duck production facilities
Management techniques rendering poultry manure less suitable for fly reproduction creates unfavourable conditions for larval growth, egg-laying and adult feeding and may reduce fly infestations. Four types of poultry manure (duck, turkey, broiler & layer) were compared. House fly landing preference was highest on duck manure. Laboratory tests investigated house fly preference to duck manure of different moisture levels (40-90%). Adult emergence numbers were highest when moisture content was 65–85%. Adult fly emergence and landing preference from manures treated with 7 concentrations of acetic acid (0.5, 1.0, 2.0, 3.25, 4.5, 5.75 and 7.0 %) and boric acid (0.25, 0.5, 1.0, 1.5, 2.0, 3.25, and 4.5%) was also assessed. All concentrations of acetic and boric acid tested significantly reduced adult emergence, but only the highest dose of acetic acid repelled adults. Practicality and cost of applying the acids to duck manure in production facilities needs to be further investigated.